National Library of Energy BETA

Sample records for longwall mining method

  1. Longwall mining

    SciTech Connect (OSTI)

    1995-03-14

    As part of EIA`s program to provide information on coal, this report, Longwall-Mining, describes longwall mining and compares it with other underground mining methods. Using data from EIA and private sector surveys, the report describes major changes in the geologic, technological, and operating characteristics of longwall mining over the past decade. Most important, the report shows how these changes led to dramatic improvements in longwall mining productivity. For readers interested in the history of longwall mining and greater detail on recent developments affecting longwall mining, the report includes a bibliography.

  2. Assessment of the single-pass thick-seam longwall mining method. Final report

    SciTech Connect (OSTI)

    Adam, R.F.J.; Douglas, W.J.

    1982-04-01

    The objectives of the project are a review of the foreign experiences in longwall mining of thick seams, an evaluation of the US thick seam reserves, a mine design, equipment specifications, and an economic study for longwall mining in a single pass up to 16 feet in US conditions. The review of foreign experience shows a steady increase in the maximum height of extraction with several examples in the range of 13 to 15 feet. Longwall face equipment is available up to an 18 feet height of extraction, based upon shields support and shearer loader. There are important reserves of thick coal seams which can be mined by a longwall in a single pass (125 billion tons). In US conditions, a retreating face with a 16 foot height of extraction and a double entry system, driven 10 feet high, are proposed. The face stability can be improved by using a two bench face cut in good geological conditions. The economic study compares longwall mining with the room-and-pillar method. Longwall mining 16 feet high coal in a single pass can compete advantageously with room-and-pillar mining. 74 figures, 14 tables.

  3. Longwall mining of thin seams

    SciTech Connect (OSTI)

    Curth, E A

    1981-01-01

    Thin seam operations pose a challenge to the ingenuity of mining engineers to overcome the factor of human inconvenience in the restricted environment and associated high cost production. Surprisingly, low seam longwalls in the Federal Republic of Germany in an average thickness of 35 in. and dipping less than 18/sup 0/ come close to achieving the average production rate of all German longwall operations. They are all plow faces, and a consistent production of 3300 tons per day and a productivity of 40 tons per man shift are reported from one of the thin seam longwalls. These results were attained by reliable high-capacity equipment and roof support by shields that can be collapsed to as low as 22 inches. Maximum mining height for plow operated faces lies at 31.5 inches. Technology for mechanized mining of flat lying coalbeds less than 31.5 inches in thickness without rock cutting is not available, and firmness of coal, undulation of the strata, coalbed thickness variation, and the necessity of cutting rock, particularly through faults, set limits to plow application. The in-web shearer can be used in firm coal to a minimum mining height of 40 inches, and a daily production of 1650 to 2200 tons is reported from a longwall in the Saar district of Germany equipped with such a shearer and shields. Numerous in-web shearers are employed in the United Kingdom; reports as to their success are contradictory. Also, experience in the United States, though limited, has been negative. The steady increase in output from single drum shearer faces in Pennsylvania is a remarkable achievement, and occasional record breaking peaks in production indicate the potential of such mining. Technology development for the future is discussed.

  4. Reactivation of landslides by surface subsidence from longwall mining

    SciTech Connect (OSTI)

    Iannacchione, A.T.; Ackman, T.E.

    1984-12-01

    Subsidence research by the US Bureau of Mines has identified and documented the occurrence of landslides over a longwall mining area in the Dunkard basin. Mining by longwall methods has been observed or produce a gradual surface subsidence profile of up to 60% of the thickness of the mined coal bed. The gradual subsidence of panels averaging 600 x 5000 ft (180 x 1525 m) can cause reactivation of older landslide deposits by decreasing the support to the landslide toe area. Examination of surficial features over a longwall mining area comprised of nine panels has led to the identification of several reactivated landslides. The two largest landslides occurred above a thin sandstone member with several associated springs. The largest landslides ranged from 100 to 300 ft (30 to 90 m) in length and from 100 to 200 ft (30 to 60 m) in width. Maximum scarp-slope displacements were approximately 7 ft (2 m). Less significant mass wasting was also observed over the longwall panels. Identification of landslides was accomplished through examination of premining aerial photographs and geologic field investigation. Characterization of reactivated zones was achieved through evaluation of current aerial 2-ft (0.6-m) surface contour map and field surveys. Recognition of problem areas will make civic and mining personnel aware of the landslide potential so that damage in such areas can be minimized.

  5. Famur delivers longwall system to Russian coal mine

    SciTech Connect (OSTI)

    2008-08-15

    The first complete Polish longwall system that was recently delivered to Russia for mining coal seams with a thickness exceeding 5 m is described. 2 photos.

  6. Respirable dust control on longwall mining operations in the United States

    SciTech Connect (OSTI)

    Mundell, R.L.; Jankowski, R.A.; Ondrey, R.S.; Tomb, T.F.

    1984-01-01

    Between 1967 and 1978 use of longwall methods to mine coal in the United States continually increased. Although these methods offer several advantages, health hazards often exist because of unique and difficult problems in the control of respirable dust. This paper discusses the results of respirable dust studies conducted on United States longwall mining operations in 1972 and 1978. Prevalent engineering control methods (ventilation, water application and use of machine cutting parameters) and administrative controls for minimizing employees' respirable dust exposure are discussed. Current research efforts for the control of respirable dust on longwall mining operations are reviewed. 21 figs.

  7. Automation of the longwall mining system

    SciTech Connect (OSTI)

    Zimmerman, W.; Aster, R.; Harris, J.; High, J.

    1982-11-01

    The longwall automation study presented is the first phase of a study to evaluate mining automation opportunities. The objective was to identify cost-effective, safe, and technologically sound applications of automation technology to understand coal mining. The prime automation candidates resulting from the industry experience and survey were: (1) the shearer operation, (2) shield and conveyor pan-line advance, (3) a management information system to allow improved mine logistics support, and (4) component fault isolation and diagnostics to reduce untimely maintenance delays. A system network analysis indicated that a 40% improvement in productivity was feasible if system delays associated with all of the above four areas were removed. A technology assessment and conceptual system design of each of the four automation candidate areas showed that state-of-the-art digital computer, servomechanism, and actuator technologies could be applied to automate the longwall system. The final cost benefit analysis of all of the automation areas indicated a total net national benefit (profit) of roughly $200 million to the longwall mining industry if all automation candidates were installed. This cost benefit represented an approximate order of magnitude payback on the research and development (R and D) investment. In conclusion, it is recommended that the shearer operation be automated first because it provides a large number of other sensor inputs required for face alignment (i.e., shields and conveyor). Automation of the shield and conveyor pan-line advance is suggested as the next step since both the shearer and face alignment operations contributed the greatest time delays to the overall system downtime.

  8. Method for describing and evaluating coal mine wastes for coal recovery: a case history from the historical longwall district in the northeastern Illinois coal field

    SciTech Connect (OSTI)

    Khan, L.A.; Berggren, D.J.

    1984-12-01

    A method for describing and evaluating coal mine wastes evolved in 1982 from studies at more than 100 historic longwall mine sites conducted by the Illinois State Geological Survey and partially funded by the Illinois Abandoned Mined Lands Reclamation Council (IAMLRC). The primary purpose was to locate and identify different types of waste materials at these sites and to evaluate them for future reclamation. The method which involves geologic characterization, sampling, standard analyses, and evaluation tests, can be used to determine the potential of a mine waste deposit for secondary recovery of coal. It yields data relating to three factors involved in secondary recovery: quality (ash content, heating value), quantity (recoverable tonnages), and the net effect of the recovery operation (product value relative to operations costs; social and environmental assets relative to liabilities). The longwall study did not directly address the question of recoverable tonnages of coal but provided information that can be used to make this evaluation, minimize the amount of drilling required for accurate forecasts of profitability, and measure the economic and environmental benefits of secondary recovery steps in a reclamation plan.

  9. Underground coal operators install several new longwall mining systems

    SciTech Connect (OSTI)

    Fiscor, S.

    2008-02-15

    Several new names appear in the annual US Longwall Census, but the population remains the same: 52 although the number of longwall mines dropped from 40 to 47. CONSOL Energy remains the leader with 12 faces. Robert E. Murray owns 8 longwall mines followed by Arch Coal with 5 and Foundation Coal with 3. West Virginia has 13 longwalls followed by 9 in Pennsylvania, 7 in Utah and 6 in Alabama. The article describes CONSOL Energy's operations. A detailed table gives for each longwall installation, the ownership, seam height, cutting height, panel width and length, overburden, number of gate entries, depth of cut, model of equipment used (shearer, haulage system, roof support, face conveyor, stage loader, crusher, electrical controls and voltage to face). 2 tabs.

  10. Innovative tailgate support for heavy ground: 11 left longwall panel, Cyprus Shoshone Mine

    SciTech Connect (OSTI)

    Woomer, C.C.; Stewart, C.

    1995-11-01

    Cyprus Shoshone Mines uses the longwall method to extract a deep, thick, pitching coal seam in the Hanna Basin of South Central Wyoming. The immediate, and main roof rock consists of weak, thinly-bedded, silty mudstones with weak, interbedded fine-to medium-grained sandstone. Tailgate ground control has been a critical factor impacting productivity at the mine. A gateroad condition mapping program for the 11 left longwall gateroads indicated potentially severe ground control problems for the tailgate. It was predicted that the existing, secondary support pattern of wood cribs would not provide adequate support capacity. Longwall coordinators and engineers made the decision to use a low density, pumpable cement known to the industry as Tekseal{trademark}, to provide the system required. A 200 psi ultimate strength mix was decided on to provide the required load capacity. The existing cribs were formed with 1-in. by 6-in. boards and brattice cloth to provide the containment. To overcome the access limitations, three boreholes were drilled from the surface to the tailgate on 2,000-ft centers. A mobile pumping station was established on the surface and the Tekseal{trademark} was pumped 900-ft. down the boreholes through a 1.5-in. steep pipe, then as much as 1,800-ft. along the tailgate entry through 1.25-in. miner spray hose. The materials required for the Tekseal{trademark} supports could all be carried into the construction locations by hand. As a direct result of incorporating relatively new methods of pumping high yield, low density, cementitious grout, the Shoshone Mine reduced downtime due to tailgate ground control problems by approximately 70% in comparison with previous longwall panels. The longwall set three monthly production records while mining the 11 left longwall under the deepest cover, steepest pitch, and most extreme ground control conditions ever encountered at the mine.

  11. Site selection report: characterization of subsidence over longwall mining panels

    SciTech Connect (OSTI)

    Not Available

    1981-02-20

    We have completed our evaluation of candidate longwall mines available for study in the Rocky Mountain Coal Province. This report summarizes our views and evaluation of two candidate mines, the Allen Mine in Weston, Colorado, and the Hawk's Nest Mine in Somerset, Colorado. WCC visited the Allen and the Hawk's Nest Mines, and rated them in order of preference for subsidence monitoring according to criteria given in this report. Based on these evaluations and related discussions with the Technical Project Officer, the Hawk's Nest Mine appears to be the preferred mine for subsidence monitoring, because it is the only candidate mine offering two adjacent longwall panels for monitoring wherein a full subsidence profile may be obtained for at least one of the panels. Selection of this mine requires that provisions be made for monitoring 2000 ft of overburden, whereas our proposal addressed a mine with 600 ft of overburden. Changes in instrumentation which may permit the project to remain within the current budget were investigated and are discussed.

  12. Evaluation of the Kloswall longwall mining system. Final report

    SciTech Connect (OSTI)

    Not Available

    1982-04-01

    This report presents the results of design studies and critical requiremental tests of a new longwall mining system specifically designed to extract a very deep web (48 inches or deeper) from a longwall panel. The report includes a productivity and cost analysis comparing the new mining system with a conventional longwall operation taking a 30-inch wide web. The analysis shows the new system will increase annual production and return on investment in most cases. The report also includes conceptual drawings and specifications for a high capacity three-drum shearer and a unique shield type of roof support specifically designed for very wide web operation. The advantages and problems associated with wide web mining are discussed in general and as they relate specifically to the equipment selected for the new mining system. Details of the critical testing and the test results are presented. The study concludes by recommending that surface tests of the haulage and guidance system be conducted as the follow-on work.

  13. 2009 underground/longwall mining buyer's guide

    SciTech Connect (OSTI)

    2009-06-15

    The guide lists US companies supplying equipment and services to underground mining operations. An index by product category is included.

  14. 2008 Underground/Longwall Mining Buyer's Guide

    SciTech Connect (OSTI)

    2008-06-15

    The guide lists US companies supplying equipment and services to mines. An index by product category is included.

  15. Coal recovery from mine wastes of the historic longwall mining district of north-central illinois. Illinois mineral notes

    SciTech Connect (OSTI)

    Khan, L.A.; Berggren, D.J.; Camp, L.R.

    1986-01-01

    Recovery of coal from mine wastes produced by historic longwall mines in northeastern Illinois was studied as part of a project undertaken in 1982 for the Illinois Abandoned Mined Lands Reclamation Council. About 100 of these mines operated in the Wilmington and La Salle Districts of the Illinois Coal Field between about 1870 and 1940; all worked the Colchester (No. 2) Coal Seam, using a manual high-extraction mining method. Large samples of the three major kinds of mine waste - gray mining gob, preparation gob, and preparation slurry - were collected from deposits at nine of the larger mine sites and analyzed to determine their general ranges of sulfur, ash, and heating values. Preparation gob and slurry from six of the sites had significant combustible contents, and were evaluated by a simple procedure in which ash analyses and wet-screening tests were used to determine the washability and yield of combustibles to recovery processes.

  16. EIA new releases: EIA examines the growing importance of longwall mining

    SciTech Connect (OSTI)

    1995-05-17

    This publication disseminates information on progress in various DOE research areas. This issues contains information on Longwall mining; electric fleet utility survey; electronic publishing system; other publications of the EIA; and places from which to purchase publications.

  17. Mine demonstration of longwall dust control techniques: Final report

    SciTech Connect (OSTI)

    Pothini, B.R.

    1988-07-01

    This report represents the results of in-mine demonstration of three dust control techniques for controlling respirable dust levels on shearer-longwall faces. The techniques were: water infusion, foam spray and reverse shearer drum rotation. The mines in which tests were conducted were in Upper Freeport seam and Pocahontas No. 3 seam. Both gravimetric samplers and GCA RAM-1 real time dust monitors were used for dust surveys. Dust control technology was reviewed, pertinent techniques were selected, equipment was procured and demonstrated as part of the program. The results indicated that water infusion can be readily implemented, foam spray holds promise, but requires more work to be done, and reverse drum rotations effective in select conditions. The tests showed that reversing cutting drum rotation has brought several positive results: (1) lower dust levels; (2) lower methane liberations; (3) improved productivity and (4) less fines. Although the improvements were only in the 10% range, the costs except for the initial change of cutting drums are nil. Therefore this technique should further be tested in soft seams with thick binder rock and also in hard blocky seams. Such investigations may lead to universal application of reverse drum rotation in the industry for beneficial reductions in respirable dust levels at insignificant costs. 13 refs., 34 figs.

  18. Instrumentation plan for characterization of subsidence over longwall mining panels at Allen Mine, Weston, Colorado

    SciTech Connect (OSTI)

    O'Rourke, J.

    1980-01-01

    The program includes surface, subsurface, and mine-level instrumentation to monitor subsidence characteristics over two adjacent longwall mining panels, situated in mountainous topography in southern Colorado. An installation plan has been detailed to show numbers and arrangements of instruments in and over the panels, and includes pertinent installation details. The appendix contains technical descriptions of standard features of some of the instrument systems, though in certain cases standard instruments will be modified by Woodward-Clyde Consultants (WCC) or the manufacturer to suit site specific installation requirements detailed on attached drawings. Technical discussions on the application of the instrument arrangements and data monitored to subsidence modeling are given in the report.

  19. Mine demonstrations of longwall dust control techniques. Technical status report, July 31, 1981-August 31, 1981

    SciTech Connect (OSTI)

    Not Available

    1981-09-09

    The objective of this study is to evaluate the effectiveness of automatic variable delivery system of water for double drum shearer longwall sections in a coordinated, systematic program conducted at a few selected longwall test sections, and to make the results available to the entire coal mining industry. The demonstrations are restricted to double drum shearer sections, because this is where the respirable dust problem is most severe. These demonstrations should guide the coal mining industry toward the best available technology to control respirable dust with the least adverse impact on coal production. Demonstration sites will be chosen to be representative of typical longwall double drum shearer sections to achieve maximum transferability of technology to the rest of the industry. Meetings were held with representatives of the following shearer manufacturers: Anderson Mavor (USA) Limited, Eickhoff-America Corporation, and Joy Manufacturing Corporation.

  20. Longwall mining dust control. Technical progress report No. 26, September 1-30, 1983

    SciTech Connect (OSTI)

    Not Available

    1983-10-14

    Dust measurements in two underground longwall mines are reported and analyzed. Shearer generated dust was the major dust source affecting personnel, at least partly because the shearer cut some bottom and top rock as well as rock inclusion - also low air velocity limited its dilution by ventilating air. (LTN)

  1. Longwall data bank

    SciTech Connect (OSTI)

    Not Available

    1982-03-01

    Sixteen longwall questionnaires were received from operators and two additional longwalls were added to the questionnaire file. Data from questionnaires were tabulated and analyzed. Relevant coal mining publications were reviewed for longwall references and 25 were added to the index file. Fifteen abstracts from selected R and D reports and professional journal articles were prepared.

  2. Longwall mining thrives in Colorado's North Fork Valley

    SciTech Connect (OSTI)

    Buchsbaum, L.

    2006-08-15

    With mining units poised for record-setting capacity and rail service restored, these mines in Colorado's North Fork valley are ready to cut coal. 4 photos.

  3. Longwall census '82

    SciTech Connect (OSTI)

    Sprouls, M.W.

    1982-12-01

    Surveys the number of operating longwall systems in the US in 1982. Active longwall systems totalled 112, with 22 companies operating faces in 11 states. Tables list the number of longwalls for each of the top 12 longwall mining companies, and the number of longwalls in each state. The most sophisticated type of longwall roof supports, shields, now comprise 93 of US longwall installations. The most sophisticated type of cutting machines, the double-ended-rangingdrum shearer (DERS) dominates. The survey also shows a trend for operators to purchase stage loaders with crusher/breakers. The crushers eliminate problems with chunks of material at conveyor transfer points. Concludes that the longwall's future in the US looks bright.

  4. Error correction for vertical surveys conducted over a subsiding longwall mining panel

    SciTech Connect (OSTI)

    Hughes, A.

    1996-12-31

    The difference between a conventional land survey and a survey of subsiding ground is discussed and a correction method was formulated for surveys conducted on subsiding ground. The area over the longwall mining panel subsided detectable amounts during the time required to conduct the survey when subsidence was at its highest rate, which introduces error into the survey. When the ground subsides before the survey is completed, the survey no longer represents the locations of all points at a common point in time, which is a basic assumption of conventional land surveying. Conventional methods of correction average movement of subsiding points and apply those amounts of movement to points which were unaffected by subsidence, a different correction method was needed. A correction method was used which uses multiple surveys to calculate rates of subsidence for each point in the survey. Subsidence rates were used to estimate the location of each point at a common time, Results are presented using the correction for subsiding ground and using no correction. Different results of the same surveys are shown in terms of elevations and curvatures. The significance of the different types of corrections is discussed and the compounding of error is demonstrated when calculating curvatures.

  5. An Experiment Study of the Propagation of Radio Waves in a Scaled Model of Long-Wall Coal Mining Tunnels

    SciTech Connect (OSTI)

    Han, G.R.; Zhang, W.M.; Zhang, Y.P.

    2009-07-01

    A long-wall coal mining tunnel is the most important working area in a coal mine. It has long been realized that radio communications can improve both productivity and safety in this dangerous area. Hence, many attempts to use radio communications in such an environment have been made. Unfortunately, no radio system has satisfactorily provided communication services there, which, we believe, is partially due to poor understanding of the propagation characteristics of radio waves in the long-wall mining tunnel. To have deeper physical insight into the propagation problem, a scaled model of the long-wall mining tunnel was built, and the propagation characteristics of UHF radio waves were measured. The experiment and the measured results are presented and discussed.

  6. Demonstration of shield-type longwall supports at York Canyon Mine of Kaiser Steel Corporation. Final technical report A

    SciTech Connect (OSTI)

    Lawrence, R.G.; King, R.

    1980-04-01

    This report represents work on a program that was originated by the USBM of the Department of the Interior and was transferred to the Department of Energy on October 1, 1977. A demonstration with the Government funded Hemscheidt 320 HSL caliper type shield supports was conducted at three longwall panels of Kaiser Steel Corporation's York Canyon Mine. The purpose of this longwall demonstration was to provide the US coal industry with information on all aspects of shield longwall mining in high seams. The demonstration provided a working model for the coal industry and during the project, 350 people from the industry, schools, and government agencies visited the demonstration. They were provided with a first hand knowledge of a working shield longwall. The demonstration showed that the control of large coal lumps may be a problem in the mining of coal seam thicker than 8 feet. Mining with shield type supports provided good working conditions and a safe working environment. The shield requires very little maintenance and has a high mechanical availability.

  7. Methane drainage with horizontal boreholes in advance of longwall mining: an analysis. Final report

    SciTech Connect (OSTI)

    Gabello, D.P.; Felts, L.L.; Hayoz, F.P.

    1981-05-01

    The US Department of Energy (DOE) Morgantown Energy Technology Center has implemented a comprehensive program to demonstrate the technical and economic viability of coalbed methane as an energy resource. The program is directed toward solution of technical and institutional problems impeding the recovery and use of large quantities of methane contained in the nation's minable and unminable coalbeds. Conducted in direct support of the DOE Methane Recovery from Coalbeds Project, this study analyzes the economic aspects of a horizontal borehole methane recovery system integrated as part of a longwall mine operation. It establishes relationships between methane selling price and annual mine production, methane production rate, and the methane drainage system capital investment. Results are encouraging, indicating that an annual coal production increase of approximately eight percent would offset all associated drainage costs over the range of methane production rates and capital investments considered.

  8. Analysis of the applicability and probable cost effectiveness of advancing longwall-mining systems in the United States. Final technical report. [Advance vs retreat

    SciTech Connect (OSTI)

    Hill, F.E.; Peake, C.V.; Sharkey, A.

    1981-07-01

    In the first phase of this study it was concluded that there are a number of advancing longwall systems that might well be applicable in the United States and, furthermore, meet the health and safety requirements of MSHA, state inspectors, operating management, and unions. Comparative analyses showed that only two of the advancing-type systems evaluated in the Phase I report failed to approach or better, economically, the typical retreating method in at least some conditions; the others appeared to warrant further attention. And if the mining plan could be worked out to allow for a switch from advancing to retreating after the early years of mining, then almost any combination of advancing and retreating would provide a better return on investment, or in our terms, have a higher net present value than would a typical retreating system. The reason for this lies in the higher initial production rates of the advancing systems and in the lower operating cost and higher ultimate productivity of a retreating system once it is established. After analyzing the advantages and disadvantages of the various advancing longwall systems for a trial program it became apparent that the modified Z System offered the best combination of economic potential and lack of conflict with US mining laws. The major attraction of the modified Z system is that it provides separate roadways to the face for intake air, exhaust air and a beltway. Thus regulatory approval of the ventilation system should not be a major obstacle. The Kaiser Steel Corporation agreed to cooperate with the development of a specification for a trial of the system at its Sunnyside Mine in Utah. The specification was developed for one longwall face to mine a series of panels at Sunnyside.

  9. First North American longwall in pitching seams proven feasible. [Colorado

    SciTech Connect (OSTI)

    Reynolds, J.F.

    1983-12-01

    There are 1.4 Gt (1.5 billion st) of recoverable coal under less than 914 m (3,000 ft) of cover in Colorado in pitching seams. Snowmass Coal Co., in cooperation with the US Department of Energy, introduced the longwall mining method in pitching seams to North America. This venture is a coal mining research program directed toward the profitable production of coal under difficult mining conditions as found in pitching seams of the western US. Snowmass Coal classifies pitching seams into the following categories for longwall on the strike in seams 3 m (10 ft) or less thick: Flat = 0 to 10/sup 0/: Normal continuous mines and shuttle cars work efficiently. Slight = 10/sup 0/ to 22/sup 0/: The maximum pitch that rubber tired equipment will function. Moderate = 22/sup 0/ to 40/sup 0/: The angle of repose of mined coal. Steep = 40/sup 0/ to 60/sup 0/: The limit of safe use of this roof support. Vertical = over 60/sup 0/. The longwall roof support covered here will work in all pitches except vertical. The shearer and conveyor will work in flat through moderate conditions. Longwalling across strike with this equipment in seam pitch over 60/sup 0/ could be accomplished with an inclined face. Development of the first longwall panel began in 1979 and was completed in 1981. The longwall equipment was installed and mining began on Aug. 11, 1981. Snowmass' performance shows that the capacity of a longwall operating on moderate pitch, up to 45/sup 0/, should be the same as a flat seam longwall. With equipment now available, pitching seam longwall is not only feasible, but cost competitive. The actual roof support method of troika concept has excellent maneuverability, good support, and low maintenance. The shearer has proven power to operate on moderate pitching seams.

  10. Development of a longwall water jet mining machine. Final technical report

    SciTech Connect (OSTI)

    Not Available

    1981-07-01

    The contract initial objective was to construct a prototype longwall water jet mining machine and evaluate its performance by field testing the unit in a strip mine coal panel. The design of the machine, Hydrominer I, was based on USBM Contract H0232064. The second objective was to design and construct an improved cutting head, Hydrominer II, which would be tested in an artificial coal heading. The testing of Hydrominer I in coal indicated significant beneficial features resulting from the application of water jet cutting to coal mining. These features were the elimination of dust, the reduction of the danger of gas and dust explosions from machine generated sparks, the ability to cut a wider web with a lower haulage force requirement than for a shearer, and the production of larger coal with fewer fines. However, the production rate was limited by inherent machine design problems which prevented Hydrominer I from achieving its full potential. The design generated for Hydrominer II was intended to correct the difficulties of the first generation machine and allow the full productive capability of the concept to be achieved while retaining the beneficial features clearly proven in the field tests of Hydrominer I. However, the artificial coal in which Hydrominer II was to be tested did not respond to the jet cutting in a manner similar to that of coal. Therefore, no conclusions can be drawn in regard to the performance of Hydrominer II based on the artificial coal tests.

  11. Research allays longwall dust

    SciTech Connect (OSTI)

    Scott, F.E.

    1984-02-01

    Longwall shearer operators have to walk with their machines along the face to mine coal, but some must endure more respirable dust than others. The Bureau of Mines is willing to help any mine having trouble keeping dust levels below the Federal standard of 2.0 mg/m/sup 3/. Recently, Robert A. Jankowski and others at the Bureau of Mines (BoM) completed a survey of twelve US longwall mines. With the cooperation of mine operators and Mine Safety and Health Administration (MSHA) officials, they gathered information on longwall double-drum shearer installations from compliance records. Six of the operations examined were ''clean'' or regularly in compliance with the dust standard, while the other six had great difficulty in complying. Subsequently, BoM conducted an investigation into the reasons for the non-compliance and a search for possible solutions to the problems.

  12. Evaluate fundamental approaches to longwall dust control. Phase II report

    SciTech Connect (OSTI)

    Babbitt, C.; Bartlett, P.; Kelly, J.; Ludlow, J.; Mangolds, A.; Rajan, S.; Ruggieri, S.; Varga, E.

    1983-03-31

    Increased levels of coal production on longwalls has brought with it higher levels of dust generation. Most United States longwalls have diffuculty complying with federal dust standards which are much stricter than those imposed in Europe. This program offers the mining industry the opportunity to sort out and share assessments of the dust control techniques in use today and those proposed for the future. This objective is being achieved through laboratory and field evaluations of both available and proposed dust control practices using innovative sampling procedures and state-of-the-art respirable dust monitors and instrumentation. In this manner, the effectiveness or lack of effectiveness of longwall dust control techniques can be quantified, thereby providing the information necessary for proper application of these techniques. This program is investigating nine different dust control techniques. This report documents the Phase II effort on each of the subprograms: Passive Barriers/Spray Air Movers for Dust Control at the Shearer; Practical Aspects of Deep Cutting; Stage Loader Dust Control; Longwall Automation Technology (remote control); Longwall Application of Ventilation Curtains; Reversed Drum Rotation; Reduction of Shield Generated Dust; Air Canopies for Longwalls; and Mining Practices. Each of these dust control methods was investigated, usually at a few or several mines, and the results were often supplemented by discussion with manufacturers and special sampling tests.

  13. A study of mining-induced seismicity in Czech mines with longwall coal exploitation

    SciTech Connect (OSTI)

    Holub, K.

    2007-01-15

    A review is performed for the data of local and regional seismographical networks installed in mines of the Ostrava-Karvina Coal Basin (Czech Republic), where underground anthracite mining is carried out and dynamic events occur in the form of rockbursts. The seismological and seismoacoustic observations data obtained in panels that are in limiting state are analyzed. This aggregate information is a basic for determining hazardous zones and assigning rockburst prevention measures.

  14. Handbook for face-to-face moves of longwall equipment

    SciTech Connect (OSTI)

    Adam, R.F.J.; Pimentel, R.A.; Shoff, W.E.

    1982-10-01

    The problem of moving the equipment of a longwall face from one (the finished) panel to the next has always been an issue critical to any longwall operation. In the United States, moving longwall equipment from panel to panel takes an average of 20 days, and moves as long as 30 days are no exception. With $8 million invested and a 20% return on investment, a longwall move of four weeks represents a $135,000 opportunity loss, in addition to the $200,000 labor required to perform the move and the interest and depreciation related to the equipment. A four to six week move each year will decrease the longwall yearly production by 10% to 15%. For the average US longwall, move time reduction is second only to increasing the system availability in its production improvement potential. The reduction of move time can only be achieved through careful planning, optimal method development, and effective and efficient operational procedures. This handbook has been developed to provide the US coal mining industry with a comprehensive background for and guidance in performing safe and efficient face-to-face moves.

  15. Evaluate fundamental approaches to longwall dust control. Phase III report

    SciTech Connect (OSTI)

    Babbitt, C.; Bartlett, P.; Kelly, J.; Ludlow, J.; Mangolds, A.; Rajan, S.; Ruggieri, S.; Varga, E.

    1984-03-31

    The overall objective of the contract is to evaluate the effectiveness of available dust control technology for double-drum shearer longwall sections in a coordinated, systematic program at a few longwall test sections and to make the results available to the entire coal mining industry. This program is investigating nine different dust control techniques. These nine subprograms encompass a broad range of dust control measures ranging from administrative controls to new hardware. They span not only presently employed methods but also those recently adopted in the United States and those proposed for the future. This report documents the Phase III effort on each of the subprograms. For clarity, the report is divided in sections by subprogram as follows: Section 2, Subprogram A - passive barriers/spray air movers for dust control; Section 3, Subprogram B - practical aspects of deep cutting; Section 4, Subprogram C - stage loader dust control; Section 5, Subprogram D - longwall automation technology; Section 6, Subprogram E - longwall application of ventilation curtains; Section 7, Subprogram F - reversed drum rotation; Section 8, Subprogram G - reduction of shield generated dust; Section 9, Subprogram H - air canopies for longwalls; and Section 10, Subprogram I - mining practices. 43 figures, 11 tables.

  16. Single-entry Longwall study. Volume I: report. Final report, May 1982. [195 references; single vs multiple entry

    SciTech Connect (OSTI)

    Not Available

    1980-05-01

    This study is an effort to determine legal and technical constraints on the introduction of single entry longwall systems to US coal mining. US mandatory standards governing underground mining are compared and contrasted with regulations of certain foreign countries, mainly continental Europe, relating to the employment of longwall mining. Particular attention is paid to the planning and development of entries, the mining of longwall panels and consequent retrieval operations. Sequential mining of adjacent longwall panels is considered. Particular legal requirements, which constrain or prohibit single entry longwall mining in the US, are identified, and certain variances or exemptions from the regulations are described. The costs of single entry systems and of currently employed multiple entry systems are compared. Under prevailing US conditions multiple entry longwall is preferable because of safety, marginal economic benefit and compliance with US laws and regulations. However, where physical conditions become hazardous for the multiple entry method, for instance, in greater depth or in rockburst prone ground, mandatory standards, which now constrain or prohibit single entry workings, are of doubtful benefit. European methods would then provide single entry operation with improved strata control.

  17. Rock-mechanics instrumentation program for Kaiser Steel Corporation's demonstration of shield-type longwall supports at York Canyon Mine, Raton, New Mexico. Volume 1. Final report

    SciTech Connect (OSTI)

    Gentry, D.W.; Stewart, C.L.; King, R.P.

    1981-05-01

    This report presents the results of a rock mechanics instrumentation program designed to determine the rock mass response due to longwall mining a thick coal seam utilizing shield-type supports at the York Canyon Mine near Raton, New Mexico. The data collected during this study is unique in that it represents the results from mining three adjacent longwall panels varying from sub-critical to super-critical in a known geologic environment with cross- and along-panel topographic variations. Data from the program indicated the following: (1) Topography significantly influenced the magnitude and distribution of surface movements. (2) The study failed to substantiate the theory that the angle of draw decreased as the depth of overburden increased. (3) Subsidence started when the face was an average of 0.33h (h = overburden depth) from a given surface point and was essentially completed when the face was 0.9h beyond the surface point. (4) Underground mining activity produced almost instantaneous surface movement and major surface subsidence ceased almost as soon as mining ceased. (5) Topography influenced shield loading patterns only where the overburden depth was thin. (6) The width of the pressure abutment was apparently related to the depth of overburden. (7) The type of roof rock controlled the amount of roof-sag. (8) With longwall face advance, the roof tended to move away from surface topographic highs and towards the caved area. (9) Roof-floor convergence at the mining face was approximately one percent of extracted seam height. (10) The magnitude of roof-floor convergence out ahead of the mining face could be related to the face distance with a logarithmic curve function.

  18. Current longwall ventilation problems and implications for thick seam longwalls. Final technical report. [133 references

    SciTech Connect (OSTI)

    Not Available

    1980-06-01

    The objective of this investigation was to identify, analyze and suggest solutions to ventilation problems of the following mining systems proposed for use in western thick seams; multiple lift longwall; single pass longwall with face height in the range of 12 to 19 feet; longwall sublevel caving. To reach this objective, background information on the regulations and ventilation practices relevant to the three methods was reviewed. This was followed by an identification of ventilation problems including the sources and quantities of methane emissions, respirable coal dust, self ignition and self heating. The problems were then analyzed to determine the probability of occurrence, the cause of the problem, and its consequences. Having analyzed these problems, solutions were described to the problems. The major finding of this effort was that, while certain ventilation difficulties can be isolated peculiar to these three moethods, in general, seam specific conditions have a larger role in determining the success of ventilation than does the method used. The major difficulties to be faced by these novel methods are the same as those to be faced by conventional longwalls. Research efforts should proceed on that basis.

  19. Longwall population holds steady at 52

    SciTech Connect (OSTI)

    Fiscor, S.

    2007-02-15

    The overall population stands at 48 mines operating 53 longwalls. CONSOL Energy remains the leading US longwall operator with 12 installations. With the acquisition of the Andalex properties in Utah, Robert E Murray now owns eight longwall mines followed by Arch Coal (5) and Massey Energy (4). West Virginia remains the leading longwall mining state with 14 faces in 2005, followed by Pennsylvania (8), Alabama (6), Utah (6) and Colorado (5). A detailed table gives for each longwall installation, the ownership, seam height, cutting height, panel width and length, overburden, number of gate entries, depth of cut, model of equipment used (shearer, haulage system, roof support, face conveyor, stage loader, crusher, electrical controls and voltage to face). The most striking difference between the 2007 US Longwall Census and past reports carried out by Coal Age is the increased number of longwall operators that believe they have the most productive operation. Several operators have purchased or intend to purchase new equipment or upgrade the technology of the faces. Longwall mining in the US has reached a balanced state. 1 photo., 1 tab.

  20. Total number of longwall faces drops below 50

    SciTech Connect (OSTI)

    Fiscor, S.

    2009-02-15

    For the first time since Coal Age began its annual Longwall Census the number of faces has dropped below 50. A total of five mines operate two longwall faces. CONSOL Energy remains the leader with 12 faces. Arch Coal operates five longwall mines; Robert E. Murray owns five longwall mines. West Virginia has 13 longwalls, followed by Pennsylvania (8), Utah (6) and Alabama (6). A detailed table gives for each longwall installation, the ownership, seam height, cutting height, panel width and length, overburden, number of gate entries, depth of cut, model of equipment used (shearer, haulage system, roof support, face conveyor, stage loader, crusher, electrical controls and voltage to face). 2 tabs., 1 photo.

  1. Rib pillar extraction - An alternative to longwalling and shortwalling

    SciTech Connect (OSTI)

    Habenicht, H.; Urschitz, E.

    1987-06-01

    Three mining methods for full extraction in flat coal seams - i.e., longwall (LW), shortwall (SW), and rib pillar extraction (RPE) - are compared with each other in view of the introduction of a mechanized, self-advancing roof support. Features are shown according to which RPE appears most attractive under certain conditions. In this presentation, the mining methods are outlined and discussed. The new support (Alpine Breaker Line Support, ABLS) is described, and its employment is explained. A trial operation in RPE using the ABLS has been conducted successfully in a South African coal mine. The results and improvements are stated.

  2. Dust control technology in longwall coal mining. Progress report No. 37, August 1-31, 1984

    SciTech Connect (OSTI)

    Ruggieri, S.K.

    1984-09-20

    Consistent data-recording intervals offer much greater insight into the mechanics of shield dust than the traditional one-reading-per-movement approach. Based on the upstream-downstream comparisons, it would appear that a significant amount of shield-generated dust does occur, and that a large fraction of the upstream content may in fact be from residual shield dust filtering through the canopy gaps. It appears that the vast majority of respirable dust in the walkway occurs during the set cycle. A large amount of visually impressive nuisance debris is dropped during the drop and advance, however, this does not appear to be as dangerous as the set cycle. Not enough consistent data were collected to ascertain any positive, quantifiable cause and effect relationship between dust and debris accumulation, amounts lost, canopy, and checkplate gaps. The graphical plots, however, are extremely suggestive and the next field visits should incorporate a more intensive examination of these parameters. It may also be instructive to follow the mining sequence throughout a mining day, such that shift to shift variations would be minimized and determinable. The canopy gap water sprays could not be tested due to operational constraint.

  3. McElroy grows longwall production safely

    SciTech Connect (OSTI)

    Fiscor, S.

    2009-05-15

    One of America's leading underground coal mines has successfully transitions to a two-panel mine. A second longwall face way installed by CONSOL Energy at the McElroy mine south of Moundsville, W.Va. as part of a $200 m upgrade some five years ago. The article describes this installation and the current operations. 3 photos.

  4. Coal companies invest in more longwall capacity

    SciTech Connect (OSTI)

    Fiscor, S.

    2006-02-15

    This year's annual survey shows not much has changed since last year. The overall population stands at 47 mines operating 53 longwalls. CONSOL Energy remains the leading US longwall operator with 13 installations, followed by Arch Coal (5), Robert E. Murray (5) and Massey Energy (4). West Virginia remains the leading longwall mining state with 14 faces in 2005, followed by Pennsylvania (8), Alabama (7), Utah (7) and Colorado (5). A detailed table gives for each longwall installation, the ownership, seam height, cutting height, panel width and length, overburden, number of gate entries, depth of cut, model of equipment used (shearer, haulage system, roof support, face conveyor, stage loader, crusher, electrical controls and voltage to face). 1 photos., 2 tabs.

  5. Dust control technology for longwall mining. Technical progress report, No. 36, July 1-31, 1984

    SciTech Connect (OSTI)

    Ruggieri, S.K.

    1984-08-21

    Preliminary analysis of the data from the Emery Wilberg Mine evaluation showed that the intake dust level and ventilation conditions were virtually constant throughout the evaluation. These factors coupled with the consistent cutting sequence of the shearer appear to have resulted in very reliable data. The evaluation examined four major test conditions: open stageloader with baseline sprays (10 gpm); open stageloader with all spraybars operating (20 gpm); covered stageloader with baseline sprays (10 gpm); and covered stageloader with all spraybars operating (20 gpm). Data was recorded during both the cutting and clean-up passes. Very little dust was generated during the clean-up pass. Any dust reductions due to improved conditions were difficult to detect because of low dust levels. During the cutting pass, dust levels were considerably higher and the improvements were quite obvious. With an open stageloader the changes from baseline conditions to that of all spray systems operating produced dust reductions of up to 50 percent within the headgate and a 30 percent improvement at shield number 20. Under baseline operating conditions, the dust levels produced with an open stageloader were compared with the levels produced with the stageloader covered. The results showed a significant improvement in the discharge region of the crusher, with 40 percent improvements at the headgate operator and shield number 20. It appears that covering the stageloader provides the largest reduction in dust levels. The application of additional water to the spraybars produced further improvements. Reductions in belt entry dust levels were directly related to the amount of water applied to the stageloader to belt transfer point spraybar.

  6. DOE - Fossil Energy: Coal Mining and Transportation

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Mining Fossil Energy Study Guides Coal Mining and Transportation Coal Miners - One type of mining, called "longwall mining", uses a rotating blade to shear coal away from the ...

  7. Coal mine directory: United States and Canada

    SciTech Connect (OSTI)

    2004-07-01

    The directory gives a state-by-state listing of all US and Canadian coal producers. It contains contact information as well as the type of mine, production statistics, coal composition, transportation methods etc. A statistical section provides general information about the US coal industry, preparation plants, and longwall mining operations.

  8. Hydraulic mining method

    DOE Patents [OSTI]

    Huffman, Lester H.; Knoke, Gerald S.

    1985-08-20

    A method of hydraulically mining an underground pitched mineral vein comprising drilling a vertical borehole through the earth's lithosphere into the vein and drilling a slant borehole along the footwall of the vein to intersect the vertical borehole. Material is removed from the mineral vein by directing a high pressure water jet thereagainst. The resulting slurry of mineral fragments and water flows along the slant borehole into the lower end of the vertical borehole from where it is pumped upwardly through the vertical borehole to the surface.

  9. Evaluate fundamental approaches to longwall dust control: Subprogram D, Longwall automation technology

    SciTech Connect (OSTI)

    Ludlow, J.; Ruggieri, S.

    1990-05-01

    The use of automated equipment on longwall faces can offer significant benefits by the dust exposures of face personnel can be reduced by removing them from areas of high dust concentrations. While the advantages are clear, and sufficiently mature, and developments have been commercially available, the application of automated systems on US longwalls has met with limited success. The objective of this subprogram was to determine the engineering and economic restraints on the implementation and acceptance of longwall automation technology and to study the potential dust control benefits offered by the technology. Two of the more highly developed automation techniques were chosen for detailed investigation: automated shield advance and shearer remote control. This report discusses the manufacturer surveys, mining company surveys and underground evaluations conducted as part of this effort. Specific conclusions and recommendations are offered regarding the use of the techniques. 4 figs., 5 tabs.

  10. Proceedings, 27th international conference on ground control in mining

    SciTech Connect (OSTI)

    Peng, S.S.; Mark, C.; Finfinger, G.

    2008-07-01

    Topics covered include: coal bumps and rockbursts, surface subsidence, surface mining, mine seals, longwall mining, pillars, roof bolting, rock mechanics and standing supports.

  11. Longwall data bank. Quarterly project status report, August 28-November 28, 1982 and semiannual report No. 3

    SciTech Connect (OSTI)

    Not Available

    1983-01-01

    The objectives of the program are to compile and transfer to the coal industry comprehensive operational data on US longwall installations, and to provide abstracts of domestic and foreign literature related to longwall production, productivity, and dust control published since 1975. During the period of August through November 1982, five updated longwall questionnaires were received from operators and two additional longwalls were added to the questionnaire file. Three requests for information from the Data Bank were received and processed. Data from questionnaires were tabulated and analyzed. Also, relevant coal-mining publications were reviewed for articles on longwall mining. Fifteen abstracts were prepared from selected R and D reports, conference papers, and articles in professional journals. These abstracts are included in Appendix B.

  12. Longwall data bank 2. 2nd quarterly project status report, August 28-November 28, 1981

    SciTech Connect (OSTI)

    Not Available

    1982-03-01

    The literature search was completed during the period, except for an ongoing review of monthly abstract publications and coal mining journals. Working cards were completed for the comprehensive index file for all longwall publications of interest; abstracts were prepared for selected longwall publications. Revised questionnaire forms, with information from the original questionnaires, were forwarded for updating to nearly all companies presently in the questionnaire file. Selected operational data were tabulated and compared.

  13. Proceedings, 26th international conference on ground control in mining

    SciTech Connect (OSTI)

    Peng, S.S.; Mark, C.; Finfinger, G.

    2007-07-01

    Papers are presented under the following topic headings: multiple-seam mining, surface subsidence, coal pillar, bunker and roadway/entry supports, mine design and highwall mining, longwall, roof bolting, stone and hardrock mining, rock mechanics and mine seal.

  14. Geologic investigation of roof and floor strata: longwall demonstration, Old Ben Mine No. 24. Prediction of coal balls in the Herrin Coal. Final technical report: Part 2. [Mineralized peat balls

    SciTech Connect (OSTI)

    DeMaris, P.J.; Bauer, R.A.; Cahill, R.A.; Damberger, H.H.

    1983-04-01

    Coal-ball areas, large deposits of mineralized peat in the coal seam, obstructed longwall mining in the Herrin Coal at Old Ben Mine No. 24. In-mine mapping located coal balls under transitional roof - areas where the roof lithology alternates between the Energy Shale and the Anna Shale/Brereton Limestone. Specifically, coal balls occur under eroded exposures or windows of the marine Anna Shale/Brereton Limestone in the Energy Shale. Two types of coal-ball areas have been identified, based on stratigraphic position in the coal seam: type I is restricted to the top of the seam, and type II occurs at midseam and below. To predict the distribution of coal balls, as well as explain their formation, a depositional model was developed: First, freshwater sediments buried the Herrin peat. Decomposition of the sealed peat continued, producing high CO/sub 2/ partial pressures; then selective erosion took place as a river removed the cover along sinuous paths, cutting through to the peat in some places. With the seal broken, CO/sub 2/ was released, and freshwaters that contained Ca and Mg ions flushed out organic acids. Later, marine mud buried both the freshwater sediments and the exposed peat, which accounts for the transitional roof over the Herrin Coal and the coal balls under the marine shale windows in the Energy Shale. The depositional model was supported by the first comprehensive set of geochemical data for coal balls. Coal balls generally contained less than 4 percent organic carbon and very low levels of detrital minerals. Although individual sites of concentrated coal balls cannot be predicted, the specific linear roof exposures associated with these coal-ball areas can be identified by mapping. Based on previously mapped areas, the trends of these linear exposures can be projected.

  15. Longwall data bank. Quarterly project status report, February 28-May 28, 1982 and semiannual report No. 2

    SciTech Connect (OSTI)

    Not Available

    1982-07-01

    During the period of February through May 1982, five updated longwall questionnaires were received from operators and two additional longwalls were added to the questionnaire file. Two requests for information from the Data Bank were received and processed. Data from questionnaires were tabulated and analyzed. Also, relevant coal-mining publications were reviewed for longwall references and 29 were added to the index file. Thirty abstracts were prepared from selected R and D reports, conference papers, and articles in professional journals. These and 15 others prepared since the first semiannual report appear in Appendix B.

  16. Evaluate fundamental approaches to longwall dust control: Subprogram E, Longwall application of ventilation curtains

    SciTech Connect (OSTI)

    Babbitt, C.; Ruggieri, S.

    1990-05-01

    There are a number of applications on longwall faces where Brattice curtains they can improve face ventilation and dust control in coal mines. This report describes the laboratory development and/or field evaluation of several longwall ventilation curtains, including: wing curtains: The headgate cut-out'' provides a source of extreme dust concentrations for shearer operators. A wing curtain in the headgate, which shields the headgate drum from the ventilation airstream as the drum cuts out, can reduce the operator's dust exposures during the cutout by 50 to 60%; Gob curtains: a significant amount of ventilating air can be lost to the gob in the headgate area. A gob curtain between the first shield and the chain pillar rib can block much of the leakage and increase the volume of air supplied to the face by approximately 10%; walkway curtains: curtains in the walkway, perpendicular to the airflow, were evaluated for their potential to reduce the migration of dusty face air into the walkway. Unfortunately they proved ineffective; and Extended spillplate: a vertical extension to the existing spillplate was evaluated for its potential to partition the clean and contaminated airflow. Unfortunately, only a full-height spillplate (impractical for actual application), showed appreciable reductions in walkway dust levels. 30 figs., 3 tabs.

  17. Development of a high capacity longwall conveyor. Final technical report

    SciTech Connect (OSTI)

    Sparks, C

    1982-05-01

    The objectives of this program were to develop, fabricate, and demonstrate a longwall conveying system capable of transporting coal at a rate of 9000 tons/day (1000 tons/hr) and capable of accommodating a surge rate of 20 tons/min. The equipment was required to have the structural durability to perform with an operating availability of 90%. A review of available literature and discussions with longwall operators identified the problem areas of conveyor design that required attention. The conveyor under this contract was designed and fabricated with special attention given to these areas, and also to be easily maintainable. The design utilized twin 300 hp drives and twin inboard 26-mm chain at 270 ft/min; predictions of capacity and reliability based on the design indicating that it would satisfy the program requirements. Conveyor components were critically tested and the complete conveyor was surface-tested, the results verifying the design specifications. In addition, an instrumentation system was developed with analysis by computer techniques to monitor the performance of the conveyor. The conveyor was installed at a selected mine site, and it was the intention to monitor its performance over the entire longwall panel. Monitoring of the conveyor performance was conducted over approximately one-third of the longwall panel, at which point further effort was suspended. However, during the monitored period, data collected from various sources showed the conveyor to have exhibited its capability of transporting coal at the desired rate, and also to have conformed to the program requirements of reliability and availability.

  18. Method of locating underground mines fires

    DOE Patents [OSTI]

    Laage, Linneas; Pomroy, William

    1992-01-01

    An improved method of locating an underground mine fire by comparing the pattern of measured combustion product arrival times at detector locations with a real time computer-generated array of simulated patterns. A number of electronic fire detection devices are linked thru telemetry to a control station on the surface. The mine's ventilation is modeled on a digital computer using network analysis software. The time reguired to locate a fire consists of the time required to model the mines' ventilation, generate the arrival time array, scan the array, and to match measured arrival time patterns to the simulated patterns.

  19. Method of underground mining by pillar extraction

    DOE Patents [OSTI]

    Bowen, Ray J. (1879 Delann, Salt Lake City, UT 84121); Bowen, William R. (1636 Sunnydale La., Salt Lake City, UT 84108)

    1980-08-12

    A method of sublevel caving and pillar and top coal extraction for mining thick coal seams includes the advance mining of rooms and crosscuts along the bottom of a seam to a height of about eight feet, and the retreat mining of the top coal from the rooms, crosscuts and portions of the pillars remaining from formation of the rooms and cross-cuts. In the retreat mining, a pocket is formed in a pillar, the top coal above the pocket is drilled, charged and shot, and then the fallen coal is loaded by a continuous miner so that the operator remains under a roof which has not been shot. The top coal from that portion of the room adjacent the pocket is then mined, and another pocket is formed in the pillar. The top coal above the second pocket is mined followed by the mining of the top coal of that portion of the room adjacent the second pocket, all by use of a continuous miner which allows the operator to remain under a roof portion which has not been shot.

  20. Study of face-to-face moves for longwall equipment. Final report, Part 1

    SciTech Connect (OSTI)

    Pimentel, R.A.; Shoff, W.E.; Adam, R.F.J.

    1982-11-01

    This report documents a study with the objective to design and develop methods and techniques to reduce longwall equipment move time by 30 percent. A literature study was performed and general foreign and US longwall move practices were documented. Subsequently, four US longwall moves were studied using existing records and on-site time and method studies. These moves were analyzed to identify the positive and negative aspects with respect to time, manpower use, cost and safety. Recommendations are made for each of the four moves studied and a cost benefit analysis is performed to determine the economic feasibility of the recommendations. The actual results are compared with projected results determined by a Critical Path Model analysis of a move incorporating the recommendations. General recommendations are made for improving face-to-face move performance.

  1. Patent data mining method and apparatus

    DOE Patents [OSTI]

    Boyack, Kevin W.; Grafe, V. Gerald; Johnson, David K.; Wylie, Brian N.

    2002-01-01

    A method of data mining represents related patents in a multidimensional space. Distance between patents in the multidimensional space corresponds to the extent of relationship between the patents. The relationship between pairings of patents can be expressed based on weighted combinations of several predicates. The user can select portions of the space to perceive. The user also can interact with and control the communication of the space, focusing attention on aspects of the space of most interest. The multidimensional spatial representation allows more ready comprehension of the structure of the relationships among the patents.

  2. 14. International conference on ground control in mining: Proceedings

    SciTech Connect (OSTI)

    Peng, S.S.

    1995-11-01

    This volume contains the 38 papers presented at the conference. Papers have been divided into the following sections: Innovative longwall tailgate support; Effects of high horizontal stresses; Pillar recovery; Pillar design; Prop support; Roof and rib bolting; Floor stability; Surface subsidence; Longwall operations; Longwall entry stability; and Multiple seam mine design. Except for two papers, one on iron ore mining and the second on the Waste Isolation Pilot Plant, all papers deal with underground coal mining. Thirty-seven papers have been processed separately for inclusion on the data base.

  3. Dust controls at longwalls with water infusion and foam: Technical progress report

    SciTech Connect (OSTI)

    Pothini, R.; Hamilton, H.

    1987-12-31

    A study of the effects of shearer drum rotation on dust generation, product size, productivity, power consumption, machine reliability, and methane generation was undertaken in the Virginia Pocahonatas No. 1 mine. The study was made to determine the benefits, if any, achieved from the reversal of the head drum rotation from the normal direction (roof to floor) to the reversed direction (floor to roof). The operation of the shearer with reversed drum rotation proved superior. There was a 14% reduction in respirable dust on the up-wind side of the shearer and a 40% reduction on the down-wind side when the machine was operated with reversed rotation. Reversed rotation yielded an improvement of approximately 10% in the amount of coarse (+1/4 inch) material reaching the longwall conveyor belt. Time studies indicated a 13% improvement in productivity using reversed rotation. There was no discernible difference in the rate of power consumption. Reversed rotation data indicated a 22% reduction in methane generation per ton of coal mined during the cutting pass. Reversed drum rotation provided the benefits of a safer work environment (reduced respirable dust and methane generation), increased production (improvement in machine potential and availability), and improved product size. Reversed rotation should be considered a standard for all longwall shearers in the Virginia division and evaluated for use on the remaining longwalls within the company.

  4. High horizontal movements in longwall gate roads controlled by cable support systems

    SciTech Connect (OSTI)

    Dolinar, D.R.; Tadolini, S.C.; Blackwell, D.V.

    1996-12-01

    Controlling coal mine roofs subjected to high-horizontal stress conditions has always been difficult and uncertain. Traditional supports such as wooden cribs and posts, concrete donut cribs, and standing supports collapse and fail when the roof and floor move horizontally as mining progresses. The former U.S. Bureau of Mines (USBM) (currently the U.S. Department of Energy (DOE)), in cooperation with Western Fuels-Utah, Incorporated, conducted research to provide an alternative for traditional secondary support systems in a 3-entry gate road system subjected to high horizontal movements. The support system used in several other coal mine operations, consisted of internal high-strength galvanized resin-grouted cable supports. The system virtually eliminates the necessity for external crib, timber, or concrete supports. The support system consisted of 2.4 m (8 ft) full-column resin grouted bolts and 4.8 m (16 ft) long cable supports installed in conjunction with wire mesh and {open_quotes}Monster-Mats.{close_quotes} Cable loading and roof deformations were monitored to evaluate the behavior of the immediate and main roofs during first and second panel extractions. Additionally, cable trusses were installed on the longwall headgate to protect the coal conveyance system from roof and pillar falls created by the formation of cutters and gutters. The test results indicated that the designed support system successfully maintained the roof during the extraction of two longwall panels and dramatically reduced the cost of secondary support. This paper describes the theory of high-horizontal roof movements, the advantages of vertical cable supports and cable trusses, and presents the roof and cable measurements made to assess the support performance during longwall retreat mining.

  5. Longwall dust control field tests

    SciTech Connect (OSTI)

    Not Available

    1984-06-14

    Following are highlights of the observations and conclusions drawn from the certain field tests: The use of Kaiser's wing curtain significantly reduced the average air velocity around the face corner, particularly when the gob curtain was removed (Kaiser's existing procedure). The velocity reduction will result in a lessened tendency for headgate cutout dust to be blown directly into the walkway negatively impacting the operator's exposure. Dust will be more effectively channeled around the face corner and downstream past the shearer body. At shield No. 10, average air velocities were within 15 percent of each other over all four of the curtain configurations tested. This indicated that curtain usage had a minimal effect on airflow levels along the face for Kaiser's given condition of gob consolidation. The high air velocity (spot) readings occurring just downstream of the installed wing curtain were due to leakage through gaps in the curtain around the stageloader. The volume of leakage was not significant, but proved to be helpful in sweeping the downstream headgate region clean of contaminants and preventing recirculation. Kaiser's curtain system design has proven to be very rugged, practical and effective and would be suitable for use in many coal mines. Used in conjunction with the semipermanent stageloader curtain, the wing curtain can remain in position for nearly 30 to 40 feet of face advance before needing to be repositioned. The stageloader curtain itself could be mounted directly to the stageloader for automatic advance with headgate equipment. This would only be feasible if the headgate roof horizon was consistent. Kaiser currently hangs the curtain independently and repositions it as required.

  6. Evaluate fundamental approaches to longwall dust control: Subprogram H, Air canopies for longwalls

    SciTech Connect (OSTI)

    Rajan, S.; Ruggieri, S.K.

    1990-05-01

    This report describes the laboratory development and evaluation of an air canopy concept for longwall faces. The objective in an underground application would be to create a clean air zone along the face walkway by equipping the shields with water-powered scrubbers or other devices. Contaminated air would be extracted, cleaned and reinjected into the breathing zone of face personnel. The concept was evaluated in a full scale longwall test facility by equipping alternate shields with simulated air canopies. A variety of canopy configurations and airflow capacities were tested under different face ventilation situations to determine the quality and extent of the clean air zone developed by the canopy. The results revealed that even the most optimum configurations were unable to create a suitable clean air zone. Low effectiveness, coupled with high projected costs for underground application, showed the concept to be unfeasible and further development effort was cancelled. 21 figs.

  7. 87th regular meeting of the Rocky Mountain Coal Mining Institute: Proceedings

    SciTech Connect (OSTI)

    Finnie, D.G.

    1991-01-01

    Eleven papers are included in these proceedings. Topics include management of coal mining operations, improving mine health and safety, new technologies for longwall mining, coal haulage, coal drying, a demonstration of the LFC process, and state of the art in mining automation. All eleven papers have been processed for inclusion on the data base.

  8. Evaluate fundamental approaches to longwall dust control: Subprogram F, Reversed drum rotation

    SciTech Connect (OSTI)

    Ludlow, J.; Kelly, J.; Ruggieri, S.

    1990-05-01

    In longwall mining, a significant portion of the shearer operator's dust exposure is caused by dust generated during loading. With the conventional direction of shearer drum rotation, loading efficiency is usually poor due to obstructions caused by the ranging arms and the cowl support arms. By reversing the normal direction of rotation, however, the arms no longer provide an obstruction. This results in improved loading efficiency and reduced dust generation. This report describes the reversed drum rotation concept and presents the results of a field survey and underground evaluation conducted to prove its feasibility and to measure its dust control benefits. Through this effort, the technique was shown to be feasible from both a mining and mechanical standpoint. During the underground test, it reduced dust levels near the shearer operator's positions by about 85%. 20 figs., 4 tabs.

  9. European empirical methods applied to subsidence in U. S. coal fields

    SciTech Connect (OSTI)

    Munson, D.E.; Eichfeld, W.F.

    1980-10-01

    The empirical methods commonly used in Europe to describe the shape of subsidence troughs are tested against the field data of the York Canyon Mine in Northern New Mexico. This mine is in a flat lying seam under rugged terrain. The subsidence data consists of time-correlated measurements of surface displacements above two longwall panels. While the profile fits from the graphical methods (United Kingdom) do not agree with the measured profiles, the profile functions of the error integral type used in Continental Europe fit the data well. The profile function analysis of the development curves also suggests a time-dependent response of the overburden. These results, except for the specific profile function used, are similar to those found previously for longwall subsidence at the Old Ben No. 24 Mine. Parameter values of the fit, i.e., the effective half range of the function and inflection point offset, were determined for all profiles. These parameters for the development curves and traveling profiles, which fundamentally result from the same raw data, exhibit markedly different apparent ''scatter.'' The rather narrow range of values for the development curves suggest that individual points subside in a well-behaved manner; and hence, the large variation in parameter values for the traveling profiles reflects an inadequacy in the analysis in correlation between points. Consequently, the use of influence functions appears to be a possible method for improving the empirical analysis of longwall subsidence.

  10. Gauging apparatus and method, particularly for controlling mining by a mining machine

    SciTech Connect (OSTI)

    Campbell, J.A.; Moynihan, D.J.

    1980-04-29

    Apparatus for and method are claimed for controlling the mining by a mining machine of a seam of material (e.g., coal) overlying or underlying a stratum of undesired material (e.g., clay) to reduce the quantity of undesired material mined with the desired material, the machine comprising a cutter movable up and down and adapted to cut down into a seam of coal on being lowered. The control apparatus comprises a first electrical signal constituting a slow-down signal adapted to be automatically operated to signal when the cutter has cut down into a seam of desired material generally to a predetermined depth short of the interface between the seam and the underlying stratum for slowing down the cutting rate as the cutter approaches the interface, and a second electrical signal adapted to be automatically operated subsequent to the first signal for signalling when the cutter has cut down through the seam to the interface for stopping the cutting operation, thereby to avoid mining undesired material with the desired material. Similar signalling may be provided on an upward cut to avoid cutting into the overlying stratum.

  11. Dust control at longwalls with water infusion and foam. Technical progress report through November 30, 1982

    SciTech Connect (OSTI)

    Not Available

    1982-01-01

    Foam spray equipment and materials for dust suppression on longwall double drum shearer faces have been procured. This equipment includes metering pumps, foam generators and mounting brackets, foam solutions, flow meters, real time and gravimetric sampling equipment, hoses and valve banks. Initial tests have been conducted in the laboratory with three types of generators and five types of foam solutions. Based on these tests, Senior Conflow's cluster spray and Onyx Chemical Company's millifoam solution have been selected. For pumping foam solution to the shearer, Jon Bean's 2 hp, 120 VAC single-phase ceramic lined piston pump has been selected. For field tests, equipment has been installed underground in Dobbin mine in Upper Freeport seam on Eickhoff EDW 300 double drum shearer. Foamspray tests have been conducted. Real time and gravimetric dust samples have been collected. Real time sampling results indicate a dust level reduction of up to 37 percent with foam spray compared to the base case of water sprays.

  12. Evaluate fundamental approaches to longwall dust control: Subprogram G, Reduction of shield generated dust

    SciTech Connect (OSTI)

    Mangolds, A.; Rajan, S.; Ruggieri, S.

    1990-05-01

    As longwall shield supports have become more popular and shearer-generated dust has been reduced, many mines have noticed that support movement can be a significant respirable dust contributor. The objective of this program was to isolate and document the mechanics of support dust generation and mobilization and to devise appropriate control techniques. This was accomplished through a literature review, laboratory testing and underground surveys. The literature review studied past research related to support dust generation and existing control measures. Laboratory testing investigated a variety of ventilation factors such as canopy cross flow, eddy effects and the effectiveness of canopy sprays. Airflow over and around advancing shields was shown to be a significant factor in dust dispersion, and spray systems indicated promise for control. The underground surveys provided additional insight into the patterns of shield dust generation and dispersion, and confirmed that shield dust can be a significant fraction of workers' dust exposures. 17 figs., 3 tabs.

  13. The variable wall mining machine. Third quarterly technical report, April 1, 1994--June 30, 1994

    SciTech Connect (OSTI)

    Not Available

    1994-08-20

    This is the Third Technical Report to develop the Variable Wall Mining Machine(VWM), a patented mining system that has the potential of greatly improving the underground mining of coal and other flat-lying mineral beds by providing a greater safety for workers, a healthier human environment, and a higher productivity. One of the thrusts of this project is to analyze the adaptation of the VWM system to a dual duct ventilation system which separates the air for human breathing from the air which becomes contaminated from dust and dangerous gases. In conventional practice there is one zone in an underground working section where workers breathe the air used to carry away gases and dust. A proposed dual duct system divides the single zone into two zones: one for cutting and fragmentation and one for worker occupancy. It is both technically and economically impossible to ventilate longwall face with the conventional method when methane emission rate is higher than 1,500 cfM. The only available option to the methane problem is to pre-drain the methane before mining so the methane emission rate will be lower later during longwall mining. But it is questionable that enough methane can be predrained to significantly erase the explosibility problem. Contrariwise, the dual-duct gas control method requires significantly less ventilating air, resulting in large savings in fans, air course construction, and energy. The overall costs are measurably less. Since the cutting chamber is sealed, the dust and methane are extracted from the mine in a separate ventilation system at a speed which is independent of the general mine ventilation system.

  14. Longwall data bank. Semiannual project report, May 28-November 28, 1981

    SciTech Connect (OSTI)

    Not Available

    1981-12-01

    This is the first semiannual report on Contract No. DE-AC01-81FE00080 entitled Longwall Data Bank. The objectives of the program are to compile and transfer to the coal industry comprehensive longwall operational data representing 95 percent of the US longwall installations and to provide abstracts of domestic and foreign literature published since 1975 related to longwall production, productivity, and dust control. The number of longwall faces operating in the US is steadily increasing, but their full production potential has not been achieved due to problems such as respirable-dust control, excessive move time, roof control, etc. Generally, longwall operators are not knowledgeable of operational data for longwall operations other than their own, nor of results from current longwall research. Therefore, the purpose of this program is to establish more effective technology-transfer procedures. The literature search was completed, except for an ongoing review of weekly abstract publications. Working cards were completed for the comprehensive index file for all longwall publications of interest; abstracts were prepared for selected longwall publications. Revised questionnaire forms, with information from the original questionnaires, were forwarded for updating to nearly all companies presently in the questionnaire file. Selected operational data were tabulated and compared.

  15. Explosive fluid transmitted shock method for mining deeply buried coal

    DOE Patents [OSTI]

    Archibald, Paul B.

    1976-06-22

    A method for recovering coal from deeply buried deposits comprising drilling a hole down into a coal seam, filling the hole with water, and periodically detonating an explosive charge at the bottom of the water-filled hole. The water transmits the explosive shock wave to the face of the coal seam, thereby fracturing and dislodging the coal. The resulting suspension of loose coal in water is then pumped to the surface where the coal is recovered and the water is recycled to the mining operation.

  16. Mining

    Broader source: Energy.gov [DOE]

    Supply and cost management–including energy costs–pose key challenges for U.S. mining companies. The industry has worked with AMO to develop a range of resources for increasing energy efficiency and reducing costs.

  17. Evaluate fundamental approaches to longwall dust control

    SciTech Connect (OSTI)

    Kelley, J; Ruggieri, S.; Babbitt, C.; Wirch, S.; Rajan, S.

    1990-05-01

    Mine operators have long known that by changing certain mining practices they can reduce personnel dust exposures. The objective of this subprogram was to identify mining practices which inherently reduce personnel exposures. This was achieved through several tasks: (a) Modeling mining cycles to quantify reductions through altered practices; one key result showed the benefits of homotropal ventilation to reduce intake contamination. (b) An underground evaluation of homotropal ventilation, which revealed that intake contamination from the stageloader and crusher can be reduced by 60 to 70 percent. (c) A feasibility study of asymmetrical drums, showing that over 60 percent less cutting can be performed upstream of shearer operators during tail to head cutting. (d) Laboratory studies of the headgate cutout, showing that exposures during the cutout can be reduced by over 90 percent using special water spray and ventilation curtain techniques. (e) Underground studies of downwind dust from cutting and shield movement, showing how to best position personnel to reduce exposures from these sources. The subprogram effort culminated in extensive technology transfer through two expert system computer programs, DUSTPRO and DRUMPRO. 18 figs., 26 tabs.

  18. Characterization of subsidence over multiple-lift longwall panels. Final technical report

    SciTech Connect (OSTI)

    Not Available

    1982-09-01

    This report presents the methodology and procedures utilized in installing and removing a surface subsidence monitoring net in remote, rugged, alpine terrain. Work on this project was performed by Mine Subsidence Engineering Company (MSE) and funded by the Department of Energy (DOE). The original contract (73-month duration) called for the installation and monitoring of a surface subsidence net suitable for the characterization of subsidence over multiple lift longwall panels. However, because of DOE contract modifications, actual project work involved only the installation, baseline surveys, and subsequent removal of the subsidence monitoring net during the 24-month contract period. These activities are described herein, as well as the required permitting process. This report describes a successful methodology for permitting, installing and removing a surface subsidence monitoring net under conditions typical of those faced by many operators in the western US. This work was performed above Mid-Continent Resources' L.S. Wood No. 3 Mine, in Coal Basin, Pitkin and Gunnison Counties, Colorado, approximately five miles west of the town of Redstone.

  19. Refinement and evaluation of basic longwall dust-control techniques. Twenty-eighth monthly technical letter report, August 1984

    SciTech Connect (OSTI)

    Kost, J.A.

    1984-09-06

    The objective is to evaluate the effectiveness of available dust-control technology for double-drum shearer longwall sections. A preliminary visit was made to Harris No. 2 Mine, Eastern Associated Coal Corporation, on August 9, 1984, to assess the suitability of the longwall panel and shearer drums for a comparison of the dust-control effectiveness of Thru-flush bits and pick-face-flushing vane-mounted sprays. The section and drums were found acceptable and sampling began August 15, 1984. The sampling program consisted of two distinct test periods for each spray system (A-B-A-B) and was completed on August 28, 1984. A total of 17 cutting passes was sampled with the Thru-flush bits and 19 cutting passes were sampled with the vane sprays. Preliminery analysis of the data has begun. For the first test period with Thru-flush bits, the average perpass dust levels for H ..-->.. T cuts at the shearer and tailgate sampling locations were 5.4 mg/m/sup 3/ and 7.9 mg/m/sup 3/, respectively. The average water flow to the shearer was 42.4 gpm at a water pressure of 225 psi, as measured with the BCRNL water meter installed in the shearer line just inby the water filter at the stageloader. The water pressure at the drum spray nozzle was checked and found to be 45 psi, with all shearer water sprays operating.

  20. Preliminary report on LLNL mine seismicity deployment at the Twentymile Coal Mine

    SciTech Connect (OSTI)

    Walter, W.R.; Hunter, S.L.; Glenn, L.A.

    1996-01-01

    This report summarizes the preliminary results of a just completed experiment at the Twentymile Coal Mine, operated by the Cyprus Amax Coal Company near Oak Creek, CO. The purpose of the experiment was to obtain local and regional seismic data from roof caves associated with long-wall mining activities and to use this data to help determine the effectiveness with which these events can be discriminated from underground nuclear explosions under a future Comprehensive Test Ban Treaty.

  1. Remote mining for in-situ waste containment. Final report

    SciTech Connect (OSTI)

    Martinelli, D.; Banta, L.; Peng, S.

    1995-10-01

    This document presents the findings of a study conducted at West Virginia University to determine the feasibility of using a combination of longwall mining and standard landfill lining technologies to mitigate contamination of groundwater supplies by leachates from hazardous waste sites.

  2. UK mining invests, suppliers profit

    SciTech Connect (OSTI)

    2009-04-15

    In the midst of a major economic crisis in the United Kingdom, equipment suppliers have been reporting a number of considerable purchases by British coal mining companies. In December 2008, Liebherr-Great Britain delivered the first two of four Rq350 Litronic hydraulic excavators for use at the Broken Cross opencast coal site in Lanarkshire, Scotland. Ten Terex TR100 rigid haulers were delivered to the site in late 2008. Hatfield Colliery at Stainforth, South Yorkshire, has been reopened by PowerFuel. The main equipment for two longwall faces was supplied by Joy Mining Machinery UK Ltd. 2 photos.

  3. Research on water proportioning for dust control at Longwalls. Phase II report. [For dust control by water sprays

    SciTech Connect (OSTI)

    Pimentel, R.A.

    1983-01-07

    After the Quarto Mining Corporation had offered its cooperation, the face equipment at the South Longwall of Quarto's Powhatan No. 4 mine was studied in detail. It was decided not to increase the water system's capacity. Thus, only modifications on the shearer had to be made. The sharer is an Eickhoff 300. Some modifications had been made to the water distribution system on this machine by the mine. The water distribution, cooling and spray system as we found it is shown in Figure 4. To enable the water proportioning tests, modifications were designed as shown in Figure 5. Valve and gauge assemblies were installed in each of the water supply lines to the drums. In addition, gauges were installed to measure the flow and pressure of the water supplied to the shearer. It was decided to incorporate the existing distribution block in the design and not to change the water supply system to the motor. This could safely be done, because the modifications would not decrease the flow to the motor. Consequently, the modifications could be kept simple. All hardware necessary for the tests at Quarto was procured and the valve systems pre-assembled. A detailed sampling strategy was developed, geared toward the data collection effort at Quarto.

  4. Complementary influence functions for predicting subsidence caused by mining

    SciTech Connect (OSTI)

    Sutherland, H.J.; Munson, D.E.

    1982-01-01

    Surface subsidence caused by underground mining is described through complementary influence functions. The complementary functions developed here differ from the simple functions previously used in that the surface displacement is the result of the combined contributions of the mined and unmined zones. This eliminates computational difficulties experienced with the simple functions in determining the deflections above the rib side and in the eventual application of influence functions to complex room-and-pillar configurations. Although the analysis framework presented is intended for predicting subsidence over complex mine configurations, use of the complementary functions is illustrated adequately by application to a longwall panel of the Old Ben No. 24 coal mine.

  5. Nature-oriented open coal mining technologies using mined-out space in an open-pit. Part II: A method for selecting rational sequence of mining flat dipping stratified deposits

    SciTech Connect (OSTI)

    Molotilov, S.G.; Norri, V.K.; Cheskidov, V.I.; Mattis, A.R.

    2007-01-15

    A method is proposed for selecting a rational mining sequence with internal dumping for flat stratified deposits, using new principles of the open-pit process-space formation and development. The main criteria for substantiating the mining sequence are geometrical form and development direction of the open-pit space, structure of the working wall and transportation network, internal dumping capacities and mining earthworks volumes.

  6. High pressure water jet mining machine

    DOE Patents [OSTI]

    Barker, Clark R.

    1981-05-05

    A high pressure water jet mining machine for the longwall mining of coal is described. The machine is generally in the shape of a plowshare and is advanced in the direction in which the coal is cut. The machine has mounted thereon a plurality of nozzle modules each containing a high pressure water jet nozzle disposed to oscillate in a particular plane. The nozzle modules are oriented to cut in vertical and horizontal planes on the leading edge of the machine and the coal so cut is cleaved off by the wedge-shaped body.

  7. Evaluation of longwall industrial engineering data. Volume 1. Text. Final technical report

    SciTech Connect (OSTI)

    Pimentel, R.A.; Urie, J.T.; Douglas, W.J.

    1981-04-01

    An analysis was undertaken of an existing US Longwall Industrial Engineering data base to determine the components most in need of improvement and to investigate the performance of several mathematical models in describing the delay occurrence in longwall faces. The three longwall components identified as the major sources of production delays are: the shearer; the face conveyor; and the outby haulage system. These three components typically account fo 75% of all downtime. The major delay types for these components were identified. Recommendations are presented for further research to eliminate these delay sources. The delay frequency and duration distributions were found to be so skewed that the arithmetic mean loses its value of being typical. The use of the median to convey the idea of a typical observation is recommended. Mathematical models could provide a more comprehensive description of downtime behavior. However, the curve fitting tests performed so far were unsuccessful. Recommendations are presented for continued research in this area.

  8. Solution mining systems and methods for treating hydrocarbon containing formations

    DOE Patents [OSTI]

    Vinegar, Harold J.; de Rouffignac, Eric Pierre; Schoeling, Lanny Gene

    2009-07-14

    A method for treating an oil shale formation comprising nahcolite is disclosed. The method includes providing a first fluid to a portion of the formation through at least two injection wells. A second fluid is produced from the portion through at least one injection well until at least two injection wells are interconnected such that fluid can flow between the two injection wells. The second fluid includes at least some nahcolite dissolved in the first fluid. The first fluid is injected through one of the interconnected injection wells. The second fluid is produced from at least one of the interconnected injection wells. Heat is provided from one or more heaters to the formation to heat the formation. Hydrocarbon fluids are produced from the formation.

  9. EVALUATION OF A METHOD USING COLLOIDAL GAS APHRONS TO REMEDIATE METALS-CONTAMINATED MINE DRAINAGE WATERS

    SciTech Connect (OSTI)

    R. Williams Grimes

    2002-06-01

    concentration factor with this sample. For the two samples where CGA flotation was effective, the separation was very rapid and the concentrate volume was reduced when compared to gravity separation under similar conditions. Effective separations were achieved with very low chemical dosages and low residence times, suggesting the possibility of economic viability for processes based on this concept. The CGA flotation experiments described in the following report were conducted to provide preliminary data with which to assess the technical feasibility of using the method for remediation of metals-contaminated mine drainage waters. The experiments were conducted using common, low-cost, precipitating reagents and CGA prepared from several surfactants. Results were evaluated in terms of metals concentration reduction, reagent consumption, and concentrate volume. The results of these preliminary experiments indicate that CGA flotation may be a useful tool for the treatment of some types of mine drainage.

  10. The Kelastic variable wall mining machine. Interim final report

    SciTech Connect (OSTI)

    1995-11-12

    This machine cuts coal along a longwall face extending up to 500 feet by a rotating auger with bits. The machine also transports the coal that is cut acting as screw conveyor. By virtue of an integral shroud comprising part of the conveyor the machine is also amenable to a separation of the zones where men work from air being contaminated by dust and methane gas by the cutting action. Beginning as single intake air courses, the air separates at the working section where one split provides fresh air to the Occupied Zone (OZ) for human needs and the other split purges and carries away dust and methane from face fragmentation in the Cutting Zone (CZ). The attractiveness of the Variable Wall Mining Machine is that it addresses the limitations of current longwall mining equipment: it can consistently out-produce continuous mining machines and most longwall shearing machines. It also is amenable to configuring an environment, the dual-duct system, where the air for human breathing is separated from dust-laden ventilating air with methane mixtures. The objective of the research was to perform a mathematical and experimental study of the interrelationships of the components of the system so that a computer model could demonstrate the workings of the system in an animation program. The analysis resulted in the compilation of the parameters for three different configurations of a dual aircourse system of ventilating underground mines. In addressing the goal of an inherently safe mining system the dual-duct adaptation to the Variable Wall Mining Machine appears to offer the path to solution. The respirable dust problem is solvable; the explosive dust problem is nearly solvable; and the explosive methane problem can be greatly reduced. If installed in a highly gassy mine, the dual duct models would also be considerably less costly.

  11. Evaluation of European empirical methods for subsidence in US coal fields

    SciTech Connect (OSTI)

    Munson, D.E.; Eichfeld, W.F.

    1980-04-01

    The purpose of this study was to assess the applicability of European subsidence methods for the emerging US longwall practice. Subsidence prediction in Europe has typically used either graphical methods (United Kingdom) or mathematical methods. The mathematical methods utilize either profile or influence functions. The graphical methods were developed in the United Kingdom (UK) by the National Coal Board (NCB) from subsidence data obtained from numerous mines. Although a large data base in the United States (US) is not available, the methods can be tested against some recent measurements of subsidence of an essentially flat deposit mined at a depth of 189 m in the Illinois Coal Basin. While the total predicted subsidence by the NCB method is approximately correct, the profile shapes are not well matched. On the other hand, the profile functions, which are fundamentally independent of orientation with respect to mining, give quite accurate representation of the measured profiles. Of the antisymmetric forms tried, a trigonometric form was slightly preferably because it predicted strains that were conservative, i.e., always somewhat greater than the measured values. These results suggest that much of the European subsidence experience is applicable to US practice. Consistent values of the parameters were found for profiles with similar initial conditions or similar orientations for two longwall panel results. It should be noted that the actual profiles were always somewhat more complex than the profile functions could adequately handle and that the development curves showed time-dependent effects as well. The magnitude of these time-dependent effects, while possibly small compared to the time-independent or instantaneous subsidence, are of importance and must eventually be incorporated into a proper analysis.

  12. Socio-economic, subsidence, transportation, and legal ramifications of potential liquefaction plant sitings. Task B. Prediction of subsidence potential over abandoned mine land. Quarterly report, October 1-December 31, 1983

    SciTech Connect (OSTI)

    Peng, S.S.; Su, W.H.

    1983-01-01

    Subsidence over active longwall mines, which occurs concurrently with mining or is completed within a few days following coal extraction has been studied extensively over the past decade. On the other hand, subsidence over abandoned coal mines is difficult to predict and may take place decades after mining has ceased. Two types of delayed subsidence are normally observed: troughs, which are shallow depressions, and sinks, which are steep-sided pits. Both types of delayed subsidence may cause damages to surface structures. Most of the abandoned coal mines in the Appalachian coal field were mined by the room-and-pillar method. These mines generally are very shallow and are very irregular with unsupported roof spans of varying widths. The approach adopted in this research for predicting the subsidence potential over abandoned coal mines focuses on the development of a mathematical model, essentially a finite element model capable of modeling the viscoelastic behavior of rocks and coal. The simulation of the viscoelastic behavior of rocks and coal is needed for predicting the delayed subsidence. The assessment of subsidence potential over abandoned mine land is currently being conducted on two sites. Site investigation is aimed at obtaining the following data: surface topography, information on the overburden, local geology and ground crater hydrology, the physical and mechanical properties of the rock strats, past subsidence damages, if any, in the area, and the old mine maps. Most of the physical and mechanical properties of the rock strata will be obtained, if possible, from previous tests performed on similar types of rocks. Information on the viscoelastic behavior of the rocks and coals, however, are very scarce.

  13. Evaluate fundamental approaches to longwall dust control: Subprogram B, Practical aspects of deep cutting

    SciTech Connect (OSTI)

    Ludlow, J.; Ruggieri, S.

    1990-05-01

    Deep/slow cutting is one of the few changes that a longwall operator can make that will simultaneously reduce respirable dust, increase production and decrease power consumption. Though extensively employed in other countries, the technique has not seen widespread use in the United States. The objective of this research effort was to promote the use of deep/slow cutting by examination of the real and perceived constraints to its application. This report discusses the theoretical and experimental background of cutting with high pick penetration, the benefits to be obtained in terms of reduced dust make and specific energy consumption and the practical imparts of deeper cutting in terms of shearer performance and coal loading. Included in the report are literature references, results of surveys of equipment manufacturers and US longwall operations, results of laboratory and underground testing of deep/slow cutting and specific conclusions and recommendations for use of the technique. 9 figs. 1 tab.

  14. Tomographic imaging of rock conditions ahead of mining using the shearer as a seismic source - A feasibility study

    SciTech Connect (OSTI)

    Luo, X.; King, A.; Van de Werken, M.

    2009-11-15

    Roof falls due to poor rock conditions in a coal longwall panel may threaten miner's life and cause significant interruption to mine production. There has been a requirement for technologies that are capable of imaging the rock conditions in longwall coal mining, ahead of the working face and without any interruption to production. A feasibility study was carried out to investigate the characteristics of seismic signals generated by the continuous coal cutter (shearer) and recorded by geophone arrays deployed ahead of the working face, for the purpose of seismic tomographic imaging of roof strata condition before mining. Two experiments were conducted at a coal mine using two arrays of geophones. The experiments have demonstrated that the longwall shearer generates strong and low-frequency (similar to 40 Hz) seismic energy that can be adequately detected by geophones deployed in shallow boreholes along the roadways as far as 300 m from the face. Using noise filtering and signal cross correlation techniques, the seismic arrival times associated with the shearer cutting can be reliably determined. It has proved the concept that velocity variations ahead of the face can be mapped out using tomographic techniques while mining is in progress.

  15. Longwall data bank. First quarterly project status report, May 28-August 28, 1981

    SciTech Connect (OSTI)

    Not Available

    1981-09-01

    During the months June through August, a comprehensive literature search and index file were initiated; references from various abstract publications and indices were obtained; a microfiche reader-printer was purchased; and abstracts from selected R and D reports and articles were prepared. The longwall questionnaire was revised; a number of revised questionnaires were filled in with information from the original questionnaires and forwarded to companies for updating. In addition, new companies were requested to respond to the questionnaire.

  16. (Longwall coal mining dust control). Technical progress report, 1 November-30 November 1984

    SciTech Connect (OSTI)

    Not Available

    1984-12-28

    During November, evaluation of the dust (and gas) concentrations around the tailgate drum zone continued with the spillplate extended up to the point of shield advance. The extension of the spillplate reduced recirculation downwind of the tailgate drum and also provided test conditions. In order to better evaluate the tailgate drum zone, additional sampling points were installed. Tracer gas concentrations from a twenty-one (21) point three-tier sampling volume arround the tailgate drum were measured for comparative purposes. Tests were conducted varying one test parameter at a time, normally under two spray conditions: (A) Base Line - drums rotating with drum sprays operating at 100 psi water pressure; and (B) Base Line (as in A above) - with a shearer clearer spray system at 150 psi water pressure. The tracer gas concentration at the headgate operator, tailgate operator and at the twenty-one point tailgate drum volume for each parameter change is presented in Table 1.

  17. Feasibility of high recovery highwall mining equipment. Final report

    SciTech Connect (OSTI)

    Not Available

    1981-01-01

    Three equipment systems exhibited significant promise: the RSV Miner, a surface longwall using standard underground equipment, and the variable angle auger. Other equipment systems showing considerable merit were the surface shortwall, and the two extended depth augers. Of the three most significant systems, the RSV Miner exhibits the greatest versatility and adaptability. It may be used competently in many surface mining applications and readily adapts to geologic anomalies and changing seam heights. The machine employs steering and guidance equipment and provides the necessary capabilities for extended depth operation. Safety is good, as no men are required to work underground. However, most important is the system's recovery factor of approximately 75% to 80% of the in-situ coal reserve within reach. The surface longwall system using standard underground equipment (preferably a ranging drum shearer in conjunction with shield supports) is most suited to either a trench mining or a modified area mining application. Both applications would allow the length of the face to be held constant. Another important consideration is legal requirements for a tailgate entry, which would necessitate additional equipment for development in a modified area mining application. When compared to surface shortwall, surface longwall exhibits higher productivity, a far greater equipment selection which allows system tailoring to geologic conditions, and greater roof control due to the significantly smaller section of overburden that must be supported. Recovery should approach, and possibly exceed, 90% of the coal in-place. The variable angle auger, which is currently only a concept, fills a very real need for which no other equipment is available at this time.

  18. Types and causes of haulage-system delays out by the face in US underground coal mines. Final report. [Data from 5 mines

    SciTech Connect (OSTI)

    Douglas, W.J.; Kiefer, J.A.; Kohler, J.L.

    1982-04-01

    This report summarizes the results of a study to characterize and quantify the occurrence and impact of outby haulage delays on production in US underground coal mines. An instrumentation system employing digital data loggers was used to acquire data for over 500 belt shifts in six mines. Observers collected section production data and section delay data to supplement the haulage database. A statistical data reduction system was applied to develop statistics on failure rates and delay lengths. A production impact model was developed and applied to analyze the effect of reducing delays and implementing engineering changes to the haulage systems. Analytical investigations of the relationship between delays and mine characteristics were conducted, and the impact of feeder-breakers and bunkerage, and the addition of longwall units to existing mines was investigated. The study provides a quantitative information base on underground belt haulage delays for use by mining companies and mining researchers.

  19. Method and apparatus for measuring incombustible content of coal mine dust using gamma-ray backscatter

    DOE Patents [OSTI]

    Armstrong, Frederick E.

    1976-09-28

    Method and apparatus for measuring incombustible content of particulate material, particularly coal mine dust, includes placing a sample of the particulate material in a container to define a pair of angularly oriented surfaces of the sample, directing an incident gamma-ray beam from a radiation source at one surface of the sample and detecting gamma-ray backscatter from the other surface of the sample with a radiation detector having an output operating a display to indicate incombustible content of the sample. The positioning of the source and detector along different surfaces of the sample permits the depth of the scattering volume defined by intersection of the incident beam and a detection cone from the detector to be selected such that variations in scattered radiation produced by variations in density of the sample are compensated by variations in the attenuation of the incident beam and the gamma-ray backscatter.

  20. Evaluate fundamental approaches to longwall dust control: Subprogram A, Passive barriers/spray air movers for dust control

    SciTech Connect (OSTI)

    Kelly, J.; Ruggieri, S.

    1990-05-01

    One method to control shearer-generated dust on longwall faces is to confine the dust cloud to the face area and keep it away from face personnel as it travels downstream over the shearer body and beyond. Passive barriers can help this process by partitioning the airflow around the shearer into a clean split and a contaminated split. In addition, water sprays used as air movers (such as the Shearer Clearer developed on another USBM contract) aid the air partitioning process. A variety of passive barrier designs were developed and evaluated in the laboratory, tested in conjunction with the Shearer Clearer. The results showed that a headgate splitter arm'' to begin the airsplitting process is a vital part of a passive barrier system, whether or not a spray air moving system is also used on the shearer. A simple gob-side passive barrier along the edge of the shearer was also shown to help partition the airflow. Underground evaluations were conducted on a combination passive barrier/spray air moving system. The results confirmed the importance of the headgate splitter arm and showed that a gob-side barrier was very effective when used on shearers with ineffective external spray systems. The gob-side barrier was unnecessary, however, on shearers equipped with effective external air moving systems such as the Shearer Clearer. 32 figs., 14 tabs.

  1. Effects of pillar geometry and arrangement on the stability of longwall panel entries

    SciTech Connect (OSTI)

    Su, W.H.; Peng, S.S.

    1983-03-01

    Relative structural stability among longwall panel entries of different geometry is examined. Parametric variations are applied using two-dimensional finite element models to study the effect of various arrangements of unequal-sized chain pillars on the stability of the pillars and the entries. The average pillar stress and entry convergence are adopted as the basic stability criteria. Three models of different entry geometry and pillar size are analyzed for the three-entry system, and nine models are analyzed for the four-entry system. The tailgate phase of the entry life cycle is emphasized in the analyses.

  2. A jewel in the desert: BHP Billiton's San Juan underground mine

    SciTech Connect (OSTI)

    Buchsbaum, L.

    2007-12-15

    The Navajo Nation is America's largest native American tribe by population and acreage, and is blessed with large tracks of good coal deposits. BHP Billiton's New Mexico Coal Co. is the largest in the Navajo regeneration area. The holdings comprise the San Juan underground mine, the La Plata surface mine, now in reclamation, and the expanding Navajo surface mine. The article recounts the recent history of the mines. It stresses the emphasis on sensitivity to and helping to sustain tribal culture, and also on safety. San Juan's longwall system is unique to the nation. It started up as an automated system from the outset. Problems caused by hydrogen sulfide are being tackled. San Juan has a bleederless ventilation system to minimise the risk of spontaneous combustion of methane and the atmospheric conditions in the mine are heavily monitored, especially within the gob areas. 3 photos.

  3. Technical progress report No. thirty-one, 1 February-29 February 1984

    SciTech Connect (OSTI)

    Not Available

    1984-03-19

    The objective of this program is to evaluate the effectiveness of available dust control technology for double-drum shearer longwall sections in a coordinated, systematic program at a few longwall test sections, and to make the results available to the entire coal mining industry. Methods of controlling dusts at several longwall mines were examined and measurements made of dust concentrations at various positions at and near the face are reported. 4 figures, 1 table.

  4. Evaluate fundamental approaches to longwall dust control: Subprogram C, Stageloader dust control

    SciTech Connect (OSTI)

    Kelly, J.; Ruggieri, S.

    1990-05-01

    The contamination of intake air is a significant dust control problem, often overlooked on many longwall faces, that can add to the full shift dust exposure of all face personnel. Several sources can contribute to intake air contamination; however, the stageloader (particularly with a crusher) is the single largest source. The objective of this subprogram was to design and evaluate a stageloader dust control system. This was accomplished through a manufacturer's survey to document existing dust controls and determine design parameters for the new systems, laboratory investigations of potential system components, and three underground evaluations of different prototype ideas. Ultimately a series of simple, practical and mineworthy recommendation evolved for optimized stageloader dust control. These included enclosing the entire stageloader with brattice or conveyor belting and installing three auxiliary spraybars at strategic locations along the enclosed stageloader. A field test of these techniques reduced dust levels by 80 percent in the headgate and by 45 percent along the face. 27 figs., 8 tabs.

  5. Influence of rock discontinuities on coal mine subsidence. Open file report 29 Sep 80-10 Sep 83

    SciTech Connect (OSTI)

    O'Connor, K.M.; O'Rourke, J.E.; Carr, J.

    1983-09-10

    This report documents the process of literature review, site selection, instrument installation, data acquisition, and preliminary data reduction performed to evaluate the influence of rock mass discontinuities on coal mine subsidence. A system of surface, subsurface, and mine level instrumentation was installed at the Armco No. 7 Mine in Montcoal, WV, where the overburden ranged from 630 to 1,040 ft thick. Survey monuments, borehole pressure cells, full profile borehole inclinometer-extensometers, mine level extensometers, stressmeters, and tape extensometer convergence stations were installed to monitor displacements and stress changes. Final design of the instrumentation system was based on (1) review of available information, (2) field mapping and analysis of areal photography, (3) drilling, and (4) borehole geophysics. The report contains the complete graphed data of stress and displacements accompanying the longwall mining of a 4,800-ft-long by 480-ft-wide coal panel.

  6. Health-hazard evaluation report MHETA 89-009-1990, Consolidation Coal Company, Humphrey No. 7 Mine, Pentress, West Virginia

    SciTech Connect (OSTI)

    Kullman, G.J.

    1989-09-01

    An evaluation was made of worker exposure to hydraulic fluid used on the longwall-mining operations at Consolidated Coal Company's Humphrey Number 7 Mine, Pentress, West Virginia. Employees were complaining of headache, eye and throat irritation, congestion, and cough. A particular emulsion oil, Solcenic-3A, was used with water in the mine's hydraulic roof-support system. An analysis of the oil indicated the presence of methyl-isobutyl-carbinol (MIBC), dipropylene glycol, and paraffin hydrocarbons. Personal breathing-zone samples for MIBC were collected from all workers on the longwall mining operation during the two days of the visit. All the analysis indicated concentrations of MIBC below the limit of quantification, which was 0.6 parts per million for an 8 hour sample. These levels were well below the exposure recommendations of the Mine Safety and Health Administration. Exposure to MIBC may be occurring through skin contact with oil through hydraulic line leaks, accidents, and maintenance activity on the hydraulic machines. The report concludes that Solcenic-3A oil constituents in air did not pose a health hazard at the time of the survey.

  7. Tenth anniversary of the Surface Mining Control and Reclamation Act of 1977. Oversight hearing before the Subcommittee on Energy and the Environment of the Committee on Interior and Insular Affairs, House of Representatives, One Hundredth Congress, First Session

    SciTech Connect (OSTI)

    Not Available

    1988-01-01

    Testimony was heard from representatives from the Society of American Archeology, the Office of Surface Mining and Reclamation Enforcement, the Office of Environmental Energy Management of Pennsylvania, National Wildlife Federation, Sierra Club, Western Organizations of Resource Councils, Southwest Research and Information Center, West Virginia Highlands Conservancy, Illinois South Project, Concern About Water Loss Due to Mining, Mountain Stream Monitors, Citizens Organized Against Longwalling, Environmental Policy Institute, Kentucky Fair Tax Coalition, Save Our Cumberland Mountains, Navajo Nation, several coal mining companies, the National Coal Association, and Small Coal Operator Advisory Council. Prepared statements from all witnesses plus additional materials are included.

  8. Innovative secondary support technologies for western mines

    SciTech Connect (OSTI)

    Barczak, T.M.; Molinda, G.M.

    1996-12-01

    With the development of the shield support, the primary requirement for successful ground control in longwall mining is to provide stable gate road and bleeder entries. Wood cribbing has been the dominant form of secondary support. However, the cost and limited availability of timber, along with the poor performance of softwood crib supports, has forced western U.S. mines to explore the utilization of other support systems. The recent success of cable bolts has engendered much interest from western operators. Several innovative freestanding support systems have been developed recently including: (1) {open_quotes}The Can{close_quotes} support by Burrell Mining Products International, Inc., (2) Hercules and Link-N-Lock wood cribs and Propsetter by Strata Products (USA) Inc., (3) Variable Yielding Crib and Power Crib supports by Mountainland Support Systems, (4) the Confined Core Crib developed by Southern Utah Fuels Corporation; and (5) the MEGA prop by MBK Hydraulik. This paper assesses design considerations and compares the performance and application of these alternative secondary support systems.

  9. Seismic signals from underground cavity collapses and other mining-related failures

    SciTech Connect (OSTI)

    Walter, W.R.; Heuze, F.; Dodge, D.

    1997-07-01

    The sudden collapse of man-made underground cavities have generated seismic signals as large as magnitude 5.4. Collapses are just one of the many types of mining associated seismicity including coalbumps and rockbursts which need to be identified and distinguished from potential clandestine nuclear explosions under the recently signed Comprehensive Test Ban Treaty (CTBT). Collapses, coalbumps and rockbursts are of concern for seismically monitoring a CTBT for a number of reasons. First, they can look like explosions when using some seismic discriminant measures, such M{sub s}:m{sub b}, M{sub o}: m{sub b}, regional P/S ratios and depth. Second, underground nuclear explosions themselves produce cavities that might collapse, possibly aiding in the detection of a clandestine event. Finally, because all mine-related events occur in the vicinity of underground cavities, they may come under special scrutiny because of the concern that very large, specially constructed cavities could be used to evasively decouple a clandestine test. For these reasons mine-related seismicity in both active and former mining regions have the potential to be false alarms under a CTBT. We are investigating techniques to identify collapses, either directly via waveform modeling, or indirectly by combining several seismic discriminants. We are also investigating the source mechanisms of coalbumps and collapses to better understand the performance of seismic discriminants for these events. In particular we have found similarities in point source models of some longwall coalbumps, room- and-pillar mine collapses and NTS nuclear explosion cavity collapses. In order to understand coalbumps we are analyzing events from central Utah recorded at regional distances in Utah and Nevada including at the auxiliary station ELK. Some of these have anomalous, explosion- like high frequency P/S ratios. We are combining this new study with results from previous field work done in 1995 at a Colorado long-wall

  10. Precision Mining

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Precision Mining Double Beta Decay Dark Matter Biology Repository Science Renewable Energy Precision Mining at WIPP is Routine All tunnels that make up the WIPP underground are ...

  11. Methods and costs of thin-seam mining. Final report, 25 September 1977-24 January 1979. [Thin seam in association with a thick seam

    SciTech Connect (OSTI)

    Finch, T.E.; Fidler, E.L.

    1981-02-01

    This report defines the state of the art (circa 1978) in removing thin coal seams associated with vastly thicker seams found in the surface coal mines of the western United States. New techniques are evaluated and an innovative method and machine is proposed. Western states resource recovery regulations are addressed and representative mining operations are examined. Thin seam recovery is investigated through its effect on (1) overburden removal, (2) conventional seam extraction methods, and (3) innovative techniques. Equations and graphs are used to accommodate the variable stratigraphic positions in the mining sequence on which thin seams occur. Industrial concern and agency regulations provided the impetus for this study of total resource recovery. The results are a compendium of thin seam removal methods and costs. The work explains how the mining industry recovers thin coal seams in western surface mines where extremely thick seams naturally hold the most attention. It explains what new developments imply and where to look for new improvements and their probable adaptability.

  12. Method of locating related items in a geometric space for data mining

    DOE Patents [OSTI]

    Hendrickson, B.A.

    1999-07-27

    A method for locating related items in a geometric space transforms relationships among items to geometric locations. The method locates items in the geometric space so that the distance between items corresponds to the degree of relatedness. The method facilitates communication of the structure of the relationships among the items. The method is especially beneficial for communicating databases with many items, and with non-regular relationship patterns. Examples of such databases include databases containing items such as scientific papers or patents, related by citations or keywords. A computer system adapted for practice of the present invention can include a processor, a storage subsystem, a display device, and computer software to direct the location and display of the entities. The method comprises assigning numeric values as a measure of similarity between each pairing of items. A matrix is constructed, based on the numeric values. The eigenvectors and eigenvalues of the matrix are determined. Each item is located in the geometric space at coordinates determined from the eigenvectors and eigenvalues. Proper construction of the matrix and proper determination of coordinates from eigenvectors can ensure that distance between items in the geometric space is representative of the numeric value measure of the items' similarity. 12 figs.

  13. Method of locating related items in a geometric space for data mining

    DOE Patents [OSTI]

    Hendrickson, Bruce A.

    1999-01-01

    A method for locating related items in a geometric space transforms relationships among items to geometric locations. The method locates items in the geometric space so that the distance between items corresponds to the degree of relatedness. The method facilitates communication of the structure of the relationships among the items. The method is especially beneficial for communicating databases with many items, and with non-regular relationship patterns. Examples of such databases include databases containing items such as scientific papers or patents, related by citations or keywords. A computer system adapted for practice of the present invention can include a processor, a storage subsystem, a display device, and computer software to direct the location and display of the entities. The method comprises assigning numeric values as a measure of similarity between each pairing of items. A matrix is constructed, based on the numeric values. The eigenvectors and eigenvalues of the matrix are determined. Each item is located in the geometric space at coordinates determined from the eigenvectors and eigenvalues. Proper construction of the matrix and proper determination of coordinates from eigenvectors can ensure that distance between items in the geometric space is representative of the numeric value measure of the items' similarity.

  14. Method using a density field for locating related items for data mining

    DOE Patents [OSTI]

    Wylie, Brian N.

    2002-01-01

    A method for locating related items in a geometric space transforms relationships among items to geometric locations. The method locates items in the geometric space so that the distance between items corresponds to the degree of relatedness. The method facilitates communication of the structure of the relationships among the items. The method makes use of numeric values as a measure of similarity between each pairing of items. The items are given initial coordinates in the space. An energy is then determined for each item from the item's distance and similarity to other items, and from the density of items assigned coordinates near the item. The distance and similarity component can act to draw items with high similarities close together, while the density component can act to force all items apart. If a terminal condition is not yet reached, then new coordinates can be determined for one or more items, and the energy determination repeated. The iteration can terminate, for example, when the total energy reaches a threshold, when each item's energy is below a threshold, after a certain amount of time or iterations.

  15. Method of data mining including determining multidimensional coordinates of each item using a predetermined scalar similarity value for each item pair

    DOE Patents [OSTI]

    Meyers, Charles E.; Davidson, George S.; Johnson, David K.; Hendrickson, Bruce A.; Wylie, Brian N.

    1999-01-01

    A method of data mining represents related items in a multidimensional space. Distance between items in the multidimensional space corresponds to the extent of relationship between the items. The user can select portions of the space to perceive. The user also can interact with and control the communication of the space, focusing attention on aspects of the space of most interest. The multidimensional spatial representation allows more ready comprehension of the structure of the relationships among the items.

  16. Survey of nine surface mines in North America. [Nine different mines in USA and Canada

    SciTech Connect (OSTI)

    Hayes, L.G.; Brackett, R.D.; Floyd, F.D.

    1981-01-01

    This report presents the information gathered by three mining engineers in a 1980 survey of nine surface mines in the United States and Canada. The mines visited included seven coal mines, one copper mine, and one tar sands mine selected as representative of present state of the art in open pit, strip, and terrace pit mining. The purpose of the survey was to investigate mining methods, equipment requirements, operating costs, reclamation procedures and costs, and other aspects of current surface mining practices in order to acquire basic data for a study comparing conventional and terrace pit mining methods, particularly in deeper overburdens. The survey was conducted as part of a project under DOE Contract No. DE-AC01-79ET10023 titled The Development of Optimal Terrace Pit Coal Mining Systems.

  17. ITP Mining: Exploration and Mining Technology Roadmap

    Broader source: Energy.gov [DOE]

    This document describes the Mining Industry of the Future's development of technology roadmaps to guide collaborative research activities for mining.

  18. African mining

    SciTech Connect (OSTI)

    Not Available

    1987-01-01

    This book contains papers presented at a conference addressing the development of the minerals industry in Africa. Topics covered include: A review - past, present and future - of Zimbabwe's mining industry; Geomorphological processes and related mineralization in Tanzania; and Rock mechanics investigations at Mufulira mine, Zambia.

  19. Refinement and evaluation of basic longwall dust-control techniques. Final report, July 1981-December 1984

    SciTech Connect (OSTI)

    Kost, J.A.; Colinet, J.F.; Shirey, G.A.

    1985-02-01

    The contract objective was to evaluate the effectiveness of available dust-control technology for double-drum shearers. Eight underground surveys were conducted to evaluate drum design, drum spray nozzle locations, ranging-arm sprays, water quantity, wetting agents, and cutting techniques. The final report is made up of eight dust-control technique reports, each discussing details of the individual mine surveys. 114 refs., 37 figs., 40 tabs.

  20. Measuring mine roof bolt strains

    SciTech Connect (OSTI)

    Steblay, Bernard J.

    1986-01-01

    A mine roof bolt and a method of measuring the strain in mine roof bolts of this type are disclosed. According to the method, a flat portion on the head of the mine roof bolt is first machined. Next, a hole is drilled radially through the bolt at a predetermined distance from the bolt head. After installation of the mine roof bolt and loading, the strain of the mine roof bolt is measured by generating an ultrasonic pulse at the flat portion. The time of travel of the ultrasonic pulse reflected from the hole is measured. This time of travel is a function of the distance from the flat portion to the hole and increases as the bolt is loaded. Consequently, the time measurement is correlated to the strain in the bolt. Compensation for various factors affecting the travel time are also provided.

  1. Alternative methods for dispoal of low-level radioactive wastes. Task 1. Description of methods and assessment of criteria. [Alternative methods are belowground vaults, aboveground vaults; earth mounded concrete bunkers, mined cavities, augered holes

    SciTech Connect (OSTI)

    Bennett, R.D.; Miller, W.O.; Warriner, J.B.; Malone, P.G.; McAneny, C.C.

    1984-04-01

    The study reported herein contains the results of Task 1 of a four-task study entitled Criteria for Evaluating Engineered Facilities. The overall objective of this study is to ensure that the criteria needed to evaluate five alternative low-level radioactive waste (LLW) disposal methods are available to the Nuclear Regulatory Commission (NRC) and the Agreement States. The alternative methods considered are belowground vaults, aboveground vaults, earth mounded concrete bunkers, mined cavities, and augered holes. Each of these alternatives is either being used by other countries for low-level radioactive waste (LLW) disposal or is being considered by other countries or US agencies. In this report the performance requirements are listed, each alternative is described, the experience gained with its use is discussed, and the performance capabilities of each method are addressed. Next, the existing 10 CFR Part 61 Subpart D criteria with respect to paragraphs 61.50 through 61.53, pertaining to site suitability, design, operations and closure, and monitoring are assessed for applicability to evaluation of each alternative. Preliminary conclusions and recommendations are offered on each method's suitability as an LLW disposal alternative, the applicability of the criteria, and the need for supplemental or modified criteria.

  2. Geophysical methods for coal seam variability detection in front of mining face. Report No. 1, state of the art report

    SciTech Connect (OSTI)

    Zakolski, R.

    1980-07-01

    Problems in detecting geologic faults or washouts in coal seams by the use of seismic waves are considered. For transmission, the shot point should not be greater than 500 m from the detection point. A minimum thickness of the seam for transmission is equivalent to the lower limit of thickness for mining. The interpretation of the results is more difficult for thick seams (25 m) and the resolution is lower. The throw of a fault should be equal to the seam thickness or greater; throws of half the thickness can be detected only in favorable conditions; the fault must not be parallel to the propagation. The nature of the fault or washout cannot usually be determined. Problems are even greater when use is made of reflected waves: shorter distances (< 250 m), inclination to seam plane must be 25 to 30/sup 0/ and angle of incidence at a plane of the seam is equal to the angle of reflection. The theory of such measurements is given, the use of models for interpretation considered; the availability of equipment; and the processing of the data are discussed. (LTN)

  3. Surface mine regulations complicate reclamation

    SciTech Connect (OSTI)

    Seltz-Patrash, A.

    1980-09-01

    The Surface Mining Control and Reclamation Act of 1977 is a landmark environmental law intended to protect U.S. lands from stripmining effects. However, coal mine operators claim that some SMCRA regulations are misguidedcosting time and money, but yielding no substantial environmental benefit. Unlike other environmental acts, SMCRA details specifically the goals of reclamation and the methods that must be implemented to meet these goals. Coal industry representatives believe that this discourages innovation, promotes inefficiency by ignoring regional differences among sites, and results in unnecessary expense to the industry. Reclamation practices and progress among western coal mining companies are evaluated. (1 map, 5 photos)

  4. Methane modeling: predicting the inflow of methane gas into coal mines. Quarterly technical progress report, October 1, 1982-December 31, 1982

    SciTech Connect (OSTI)

    Boyer, C.M. II; Hoysan, P.M.; Pavone, A.M.; Schwerer, F.C.

    1982-01-01

    Maintenance and laboratory calibrations were obtained for automatic recording methanometers for use during in-mine tests. Speecifications and quotations have been obtained for battery operated versions of the automatic recording methanometers for monitoring in the tailgate region of the longwall operation. Due to mine closings, meetings with mine operators to discuss in-mine testing and to observe the mining section to be monitored have been delayed until February 1983. Assuming a resumption of coal production, actual in-mine tests are tentatively scheduled for March, 1983. Development and testing of software modules for a general two-dimensional model has continued with good progress. The major work emphasis is on the efficient computer execution of the numerical algorithms. Preliminary simulation test runs of an isolated, unstimulated well in an isotropic, homogeneous coalbed have been made. Work has been initiated on incorporating an infinite conductivity fracture in the simulation. Graphical representation of the data generated from the two-dimensional model will be produced and verified. A request was initiated for a no-cost, six-minths extension; this request has subsequently been approved. There is no change in the contract objectives or technical approach, and the project is on target with respect to expenditures.

  5. U.S. Energy Information Administration | Annual Coal Report 2014

    U.S. Energy Information Administration (EIA) Indexed Site

    6. Recoverable Coal Reserves and Average Recovery Percentage at Producing Underground Coal Mines by State and Mining Method, 2014 (million short tons) Continuous 1 Conventional and Other 2 Longwall 3 Total Coal-Producing State Recoverable Coal Reserves at Producing Mines Average Recovery Percentage Recoverable Coal Reserves at Producing Mines Average Recovery Percentage Recoverable Coal Reserves at Producing Mines Average Recovery Percentage Recoverable Coal Reserves at Producing Mines Average

  6. Exploration and Mining Roadmap

    SciTech Connect (OSTI)

    none,

    2002-09-01

    This Exploration and Mining Technology Roadmap represents the third roadmap for the Mining Industry of the Future. It is based upon the results of the Exploration and Mining Roadmap Workshop held May 10 ñ 11, 2001.

  7. Surface mining

    SciTech Connect (OSTI)

    Not Available

    1989-06-01

    This paper reports on a GAO study of attorney and expert witness fees awarded as a result of litigation brought under the Surface Mining Control and Reclamation Act. As of March 24, 1989, a total of about $1.4 million had been awarded in attorney fees and expenses - about $1.3 subject to the provisions of the Employee Retirement Income Security Act, a comparison of its features with provisions of ERISA showed that the plan differed from ERISA provisions in areas such as eligibility, funding, and contribution limits.

  8. ITP Mining: Mining Industry Roadmap for Crosscutting Technologies...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Roadmap for Crosscutting Technologies ITP Mining: Mining Industry Roadmap for Crosscutting Technologies ccroadmap.pdf (153.71 KB) More Documents & Publications ITP Mining: ...

  9. Rock mechanics design in mining and tunneling

    SciTech Connect (OSTI)

    Bieniawski, Z.T.

    1984-01-01

    This book introduces the design process as applied to rock mechanics aspects of underground mining and tunneling. Topics covered include a historical perspective, the design process in engineering, empirical methods of design, observational methods of design, and guided design.

  10. York Canyon mine evaluation. Monthly technical progress report No. 39, October 1-31, 1984

    SciTech Connect (OSTI)

    Ruggieri, S.K.

    1984-11-19

    The York Canyon mine evaluation has been completed and sent out for review and comment. Several mining companies including Consol, Plateau, and Emery have been contacted regarding future testing. York Canyon has also expressed interest in continuing the investigation. Further analysis of the York Canyon data has indicated several unknowns which should be identified during the next evaluation. Among them are the centrality of sensor position with respect to both cross and along the face axes. Also, it is felt that separation of other spatially related dust sources (e.g., conveyor, crusher, gob consolidation and air patterns) is important. In order to conduct the new headgate cutout tests, the existing longwall gallery was modified. A fan and duct work were added to simulate gob leakage in line with the headgate entry. Tracer gas concentration profiles, smoke tracers, and air velocity measurements have been taken. Primary airflows of 12,000 cfm with gob leakage of 5000 cfm and primary airflow of 7000 cfm without gob leakage gave similar results. The airflow along the face was the prime factor and not the primary airflow. The wing curtain did not have a significant impact on the tailgate operator and drum zones. It did have a marginal effect at the headgate operator zone. The use of shearer clearer spray system did have a large impact on improving the tracer gas pattern along the face, but at the same time adversely deteriorated the tailgate operator zone in two ways: higher tracer gas concentrations and water mist.

  11. Mine roof geology information system

    SciTech Connect (OSTI)

    Peng, S.S.; Sasaoka, T.; Tang, D.X.; Wilson, Y.; Wilson, G.

    2005-05-01

    A project sponsored by the US Department of Energy under the Industry of Future (Mining) program was initiated five years ago. In this project a patented drill control unit (DCU) installed DIN. the J.H. Flecher & Co.'s roof bolter was used to record the drilling parameter for experiments conducted in the mines and laboratory. Today, the drilling parameters have been recorded for more than 1,000 roof bolt holes. This article summarizes the results to date including the methods for determining quantitatively the location of voids/fractures and estimation of roof rock strength from the recorded roof bolter drilling parameters. 8 figs., 2 tabs.

  12. Imaging Ahead of Mining

    Office of Energy Efficiency and Renewable Energy (EERE)

    Coal mining is becoming more difficult as machines must extract the coal from deeper, thinner, and more geologically complex coal beds. This type of mining also includes the need to reduce risk and...

  13. Mining | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Mining Mining Supply and cost management-including energy costs-pose key challenges for U.S. mining companies. The industry has worked with AMO to develop a range of resources for increasing energy efficiency and reducing costs. Analytical Studies & Other Publications Manufacturing Energy and Carbon Footprints provide a mapping of energy use, energy loss, and carbon emissions for selected industry sectors. Mining Industry Energy Bandwidth Study (2007) Documents for historical reference Water

  14. Framework for autonomous navigation of a continuous mining machine

    SciTech Connect (OSTI)

    Anderson, D.L.

    1989-01-01

    This report includes a discussion of the navigational tasks performed by operators of mobile mining equipment, with the focus on the navigational information and guidance techniques required by continuous mining machine operators. Some previous research and attempts in remote and autonomous navigation of continuous mining machines are mentioned. Issues of research in autonomous navigation of various other mobile robots are presented, with attention focused on their applicability to a continuous mining machine navigating in the mining environment. Conclusions are stated on methods of automating the navigational tasks of a contionuous mining machine, and a decision to concentrate intitial attempts on the tasks of autonomous face navigation is defended. This report includes a presentation of the Bureau's proposed solution for autonomous face navigation of a continous mining machine, which includes the employment of a mobile roof support as a reference for guidance in the face area, and a navigational guidance system for the continuous mining machine.

  15. Mountaintop mining update

    SciTech Connect (OSTI)

    Buchsbaum, L.

    2006-07-15

    In a bad year for the US mining industry's safety record and public image, Morehead State University hosted a public meeting titled 'Mountaintop mining, health and safety forum'. This was a balanced event, with representatives from the mining industry as well as activists from the environmental community. A full account is given of the presentations and debate at the forum. 6 photos.

  16. Methane modeling: predicting the inflow of methane gas into coal mines. Quarterly technical progress report, April 1, 1982-June 30, 1982

    SciTech Connect (OSTI)

    Boyer, C.M. II; Hoysan, P.M.; Pavone, A.M.; Richmond, O.; Schwerer, F.C.; Smelser, R.E.

    1982-01-01

    Work on Phase I of the Contract program is essentially complete and was reported in the Phase I Technical Report which has been reviewed and accepted by the Contract Technical Project Officer. Phase I work included a survey of relevant technical literature and development, demonstration and documentation of a computer model, MINE1D, for flow of methane and water in coal strata for geometries corresponding to an advancing mine face and to a mine pillar. The Phase I models are one-dimensional in the space variable but describe time-dependent (nonsteady) phenomena and include gas sorption phenomena. Some revisions have been made to input/output sections of MINE1D and the documentation has been expanded. These modifications will be reported in the next Quarterly Technical Report. Preliminary test scenarios have been formulated and reviewed with the Contract Technical Project Officer for measurement of emissions during room-and-pillar and longwall mining operations. These preliminary scenarios are described in this report. A mathematical model has been developed to describe the increased stresses on the coal seam near mine openings. The model is based on an approximate elastic/plastic treatment of the coal seam and an elastic treatment of surrounding strata. In this model, elastic compaction of the coal seam decreases porosity and permeability, whereas plastic deformation increases the porosity of the natural fracture network and thereby increases the permeability. The model takes into account the effect of changes in pore fluid pressure (in the natural fracture network of the coal seam) on the deformation of the coal seam. This model is described in this report, and will be programmed for inclusion in revised versions of MINE1D and for use in the two-dimensional computer models now under development. 8 figures.

  17. ITP Mining: Education Roadmap for Mining Professionals (December 2002)

    Broader source: Energy.gov [DOE]

    A profitable and stable mining industry is vital to U.S. economic and national security. This roadmap serves to educate those professionals in the mining industry.

  18. ITP Mining: Mining Industry of the Future Mineral Processing...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    of the Future Mineral Processing Technology Roadmap ITP Mining: Mining Industry of the Future Mineral Processing Technology Roadmap mptroadmap.pdf (293.48 KB) More Documents & ...

  19. Data mining and visualization techniques

    DOE Patents [OSTI]

    Wong, Pak Chung; Whitney, Paul; Thomas, Jim

    2004-03-23

    Disclosed are association rule identification and visualization methods, systems, and apparatus. An association rule in data mining is an implication of the form X.fwdarw.Y where X is a set of antecedent items and Y is the consequent item. A unique visualization technique that provides multiple antecedent, consequent, confidence, and support information is disclosed to facilitate better presentation of large quantities of complex association rules.

  20. About the Uranium Mine Team | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Uranium Mine Team About the Uranium Mine Team Text coming

  1. Mined land reclamation in Wisconsin since 1973

    SciTech Connect (OSTI)

    Hunt, T.C.

    1989-01-01

    Reclamation has long been recognized as an essential action necessary to mitigate the degradation of land caused by mining activities. But, it is only within the past several decades that reclamation has become an integral component of the mineral extraction process. While the Metallic Mining Reclamation Act (MMRA) was passed in 1973, Wisconsin is yet to enact comprehensive state-wide reclamation requirements for mining other than metallic minerals and the code for metallic mining has yet to establish procedures and standards for reclamation success, specifically revegetation and postmining land use. This study integrates several interdisciplinary methodologies including a history of reclamation; an inventory and status report of mined lands; a critique and comparison of existing reclamation policy with previous state and current federal reclamation policies; in-field case studies of revegetation parameters, procedures, and performance standards; and an economic analysis of reclamation technology. This study makes three major recommendations: (1) The metallic mining code should be amended to establish vegetation parameters, measuring methods, and performance standards for revegetation success similar to those contained in the federal Surface Mining Control and Reclamation Act (SMCRA); (2) The metallic mining code should be amended to resolve semantic loopholes by clearly defining the endpoints of terms such as restoration, reclamation, and rehabilitation and by utilizing the reclamation continuum as a planning tool for determining acceptable postmining land use alternatives; and (3) Mandatory statewide nonmetallic legislation should be enacted to strengthen the mineral resource management program in Wisconsin by systematically and uniformly regulating the mining and reclamation of nonmetallic minerals, the state's most important mineral resource.

  2. PRB mines mature

    SciTech Connect (OSTI)

    Buchsbaum, L.

    2007-08-15

    Already seeing the results of reclamation efforts, America's largest surface mines advance as engineers prepare for the future. 30 years after the signing of the Surface Mining Control and Reclamation Act by Jimmy Carter, western strip mines in the USA, especially in the Powder River Basin, are producing more coal than ever. The article describes the construction and installation of a $38.5 million near-pit crusher and overland belt conveyor system at Foundation Coal West's (FCW) Belle Ayr surface mine in Wyoming, one of the earliest PRB mines. It goes on to describe the development by Rio Tinto of an elk conservatory, the Rochelle Hill Conservation Easement, on reclaimed land at Jacobs Ranch, adjacent to the Rochelle Hills. 4 photos.

  3. Land reclamation beautifies coal mines

    SciTech Connect (OSTI)

    Coblentz, B.

    2009-07-15

    The article explains how the Mississippi Agricultural and Forestry Experiments station, MAFES, has helped prepare land exploited by strip mining at North American Coal Corporation's Red Hills Mine. The 5,800 acre lignite mine is over 200 ft deep and uncovers six layers of coal. About 100 acres of land a year is mined and reclaimed, mostly as pine plantations. 5 photos.

  4. Mine roof support system

    SciTech Connect (OSTI)

    Culley, D.H.

    1982-01-26

    A mine roof support system is disclosed having sets of laterally spaced pairs of elongated support members adapted to be moved into and out of abutting relation with a mine roof. Wheel supported frames extend between and connect adjacent end portions of each pair of support members with adjacent wheel supported frames at the ends of the support members being in spaced tandem relation and connected to each other by connector members. Extensible prop members are connected to and move the wheel supported frames and the elongated support members connected thereto selectively toward and away from the mine roof.

  5. Data mining for ontology development.

    SciTech Connect (OSTI)

    Davidson, George S.; Strasburg, Jana; Stampf, David; Neymotin,Lev; Czajkowski, Carl; Shine, Eugene; Bollinger, James; Ghosh, Vinita; Sorokine, Alexandre; Ferrell, Regina; Ward, Richard; Schoenwald, David Alan

    2010-06-01

    A multi-laboratory ontology construction effort during the summer and fall of 2009 prototyped an ontology for counterfeit semiconductor manufacturing. This effort included an ontology development team and an ontology validation methods team. Here the third team of the Ontology Project, the Data Analysis (DA) team reports on their approaches, the tools they used, and results for mining literature for terminology pertinent to counterfeit semiconductor manufacturing. A discussion of the value of ontology-based analysis is presented, with insights drawn from other ontology-based methods regularly used in the analysis of genomic experiments. Finally, suggestions for future work are offered.

  6. Coal mine subsidence

    SciTech Connect (OSTI)

    Rahall, N.J.

    1991-05-01

    This paper examines the efficacy of the Department of the Interior's Office of Surface Mining Reclamation and Enforcement's (OSMRE) efforts to implement the federally assisted coal mine subsidence insurance program. Coal mine subsidence, a gradual settling of the earth's surface above an underground mine, can damage nearby land and property. To help protect property owners from subsidence-related damage, the Congress passed legislation in 1984 authorizing OSMRE to make grants of up to $3 million to each state to help the states establish self-sustaining, state-administered insurance programs. Of the 21 eligible states, six Colorado, Indiana, Kentucky, Ohio, West Virginia, and Wyoming applied for grants. This paper reviews the efforts of these six states to develop self-sustaining insurance programs and assessed OSMRE's oversight of those efforts.

  7. Indonesian coal mining

    SciTech Connect (OSTI)

    2008-11-15

    The article examines the opportunities and challenges facing the Indonesian coal mining industry and how the coal producers, government and wider Indonesian society are working to overcome them. 2 figs., 1 tab.

  8. Management practices--production analysis and improvement

    SciTech Connect (OSTI)

    Minnucci, C.A.; Hernai, A.S.

    1984-02-01

    In 1978, the U.S. Department of Energy funded a 2-year study to identify and quantify causes of the post-1969 coal mine productivity decline. A large number of factors hypothesized to have affected productivity during this period were analyzed using regression techniques. The results were particularly interesting for two of the factors--mining method and shift scheduling. The study results indicate that the use of longwall mining has an insignificant impact on overall mine productivity, compared to other methods, and mines operating on a two-production shift per day schedule are more productive than mines employing other shift schedules.

  9. Acid mine drainage: Balancing environmental protection and mining realities

    SciTech Connect (OSTI)

    Sturgill, B.J. Jr.; Poland, K.B.

    1995-12-31

    A major environmental concern leading to the enactment of the Surface Mining Control and Reclamation Act of 1977 (SMCRA) was the degradation of streams and waterways from discharges of acid mine drainage (AMD) resulting from coal mining operations. Although SMCRA and its regulatory scheme contains specific provisions addressing the drainage of acidic water from mine sites, as do various other agencies statutes and regulations, AMD from active and abandoned mines remains a major environmental problem in the Appalachian region. The formation of acidic water during coal mining operations is pervasive and some believe impossible to prevent.

  10. System and methods for predicting transmembrane domains in membrane proteins and mining the genome for recognizing G-protein coupled receptors

    DOE Patents [OSTI]

    Trabanino, Rene J; Vaidehi, Nagarajan; Hall, Spencer E; Goddard, William A; Floriano, Wely

    2013-02-05

    The invention provides computer-implemented methods and apparatus implementing a hierarchical protocol using multiscale molecular dynamics and molecular modeling methods to predict the presence of transmembrane regions in proteins, such as G-Protein Coupled Receptors (GPCR), and protein structural models generated according to the protocol. The protocol features a coarse grain sampling method, such as hydrophobicity analysis, to provide a fast and accurate procedure for predicting transmembrane regions. Methods and apparatus of the invention are useful to screen protein or polynucleotide databases for encoded proteins with transmembrane regions, such as GPCRs.

  11. ORS 517 - Mining and Mining Claims | Open Energy Information

    Open Energy Info (EERE)

    - Mining and Mining ClaimsLegal Published NA Year Signed or Took Effect 2013 Legal Citation ORS 517 (2013) DOI Not Provided Check for DOI availability: http:crossref.org...

  12. Mine roof support

    SciTech Connect (OSTI)

    Bollmann, A.

    1982-01-05

    A mine roof support has a base, a supporting prop extending upwardly from the base, an elongated roof-supporting element having one portion supported by the supporting prop and another portion telescopable relative to the one portion toward a mine face and having a free end formed as a housing with a width corresponding to the width of the one portion, and a thrust prop arranged to support the free end section of the telescopable portion of the roof-supporting element and having a roof-side end section which is forcedly displaceable in the housing in direction of elongation of a mine and pivotable in a substantially vertical plane about an axle arranged in the housing.

  13. Review of South American mines

    SciTech Connect (OSTI)

    Not Available

    1984-07-01

    A general overview is presented of the mining activity and plans for South America. The countries which are presented are Columbia, Argentina, Brazil, Venezuela, Chile, Peru, and Bolivia. The products of the mines include coal, bauxite, gold, iron, uranium, copper and numerous other minor materials. A discussion of current production, support and processing facilities, and mining strategies is also given.

  14. Carbon Sequestration on Surface Mine Lands

    SciTech Connect (OSTI)

    Donald Graves; Christopher Barton; Richard Sweigard; Richard Warner; Carmen Agouridis

    2006-03-31

    Since the implementation of the federal Surface Mining Control and Reclamation Act of 1977 (SMCRA) in May of 1978, many opportunities have been lost for the reforestation of surface mines in the eastern United States. Research has shown that excessive compaction of spoil material in the backfilling and grading process is the biggest impediment to the establishment of productive forests as a post-mining land use (Ashby, 1998, Burger et al., 1994, Graves et al., 2000). Stability of mine sites was a prominent concern among regulators and mine operators in the years immediately following the implementation of SMCRA. These concerns resulted in the highly compacted, flatly graded, and consequently unproductive spoils of the early post-SMCRA era. However, there is nothing in the regulations that requires mine sites to be overly compacted as long as stability is achieved. It has been cultural barriers and not regulatory barriers that have contributed to the failure of reforestation efforts under the federal law over the past 27 years. Efforts to change the perception that the federal law and regulations impede effective reforestation techniques and interfere with bond release must be implemented. Demonstration of techniques that lead to the successful reforestation of surface mines is one such method that can be used to change perceptions and protect the forest ecosystems that were indigenous to these areas prior to mining. The University of Kentucky initiated a large-scale reforestation effort to address regulatory and cultural impediments to forest reclamation in 2003. During the three years of this project 383,000 trees were planted on over 556 acres in different physiographic areas of Kentucky (Table 1, Figure 1). Species used for the project were similar to those that existed on the sites before mining was initiated (Table 2). A monitoring program was undertaken to evaluate growth and survival of the planted species as a function of spoil characteristics and

  15. MSHA (Mine Safety and Health Administration) approved mine rescue - training module (coal): fires, fire fighting, and explosions. Mine rescue team series

    SciTech Connect (OSTI)

    Not Available

    1984-01-01

    Mine rescue teams frequently must fight fires and guard against the propagation of fires or explosions during a rescue and recovery operation. The team's ability to fight fires depends a great deal on hands-on experience with different fire fighting agents and equipment. The team's work includes an assessment of fire conditions, mine fire gases and other potential hazards associated with fire fighting activity. This training module covers the underlying principles of the fire triangle and the different methods for controlling, containing and extinguishing fires in a mine. The manual also covers fire-fighting equipment, considerations involved in a sealing operation and the cause-effect of explosions.

  16. Statistically significant relational data mining :

    SciTech Connect (OSTI)

    Berry, Jonathan W.; Leung, Vitus Joseph; Phillips, Cynthia Ann; Pinar, Ali; Robinson, David Gerald; Berger-Wolf, Tanya; Bhowmick, Sanjukta; Casleton, Emily; Kaiser, Mark; Nordman, Daniel J.; Wilson, Alyson G.

    2014-02-01

    This report summarizes the work performed under the project (3z(BStatitically significant relational data mining.(3y (BThe goal of the project was to add more statistical rigor to the fairly ad hoc area of data mining on graphs. Our goal was to develop better algorithms and better ways to evaluate algorithm quality. We concetrated on algorithms for community detection, approximate pattern matching, and graph similarity measures. Approximate pattern matching involves finding an instance of a relatively small pattern, expressed with tolerance, in a large graph of data observed with uncertainty. This report gathers the abstracts and references for the eight refereed publications that have appeared as part of this work. We then archive three pieces of research that have not yet been published. The first is theoretical and experimental evidence that a popular statistical measure for comparison of community assignments favors over-resolved communities over approximations to a ground truth. The second are statistically motivated methods for measuring the quality of an approximate match of a small pattern in a large graph. The third is a new probabilistic random graph model. Statisticians favor these models for graph analysis. The new local structure graph model overcomes some of the issues with popular models such as exponential random graph models and latent variable models.

  17. Clearing rain from open-pit mine

    SciTech Connect (OSTI)

    Not Available

    1984-05-01

    Because of the large yearly rainfall in Panguna, Bougainveille Island, North Solomons Province, Papua New Guinea, unique problems have developed for the open-pit copper mine operated there by Bougainville Copper Limited. The large size of ths pit intercepts numerous streams and drainways which enter the area. The article discusses various methods to reduce and eliminate this water. Methods discussed are channels, pumping and tunneling.

  18. Mine roof bolt

    SciTech Connect (OSTI)

    Gillespie, H.D.

    1993-07-27

    A mine roof bolt is described comprising: (a) a length of multi-strand cable defining a bolt shank; (b) a tapered plug comprising a body portion having an internal bore and a frusto-conical outer surface essentially concentric with said internal bore, said tapered plug being mounted about an end of said cable at said internal bore; and (c) an internally tapered drive collar having a frusto-conical inner surface that engages said frusto-conical outer surface of said tapered plug, and having an outer surface defining a drive head that accepts a driving mechanism for rotating and linearly translating said bolt, wherein said tapered plug is mounted on an end of said cable, and said drive collar is pressed down upon said tapered plug, forcing said tapered plug against said cable, such that said drive collar, said tapered plug, and said cable, when fitted tightly together, define said mine roof bolt.

  19. Mine roof support

    SciTech Connect (OSTI)

    Bollmann, A.

    1981-02-24

    A mine roof support has a base and a roof shield pivoted to the base and carrying at its upper end a pivoted cap which is urged upwardly against the mine roof by a hydraulic pit prop reacting between the cap and the base. The lower end of the roof shield is connected to the base by two links each having a pivot cooperating with a pivot on the roof shield, and a pivot cooperating with a pivot on the base. In addition, the base and/or the lower end of the roof shield has an auxiliary for each link and each link has an auxiliary pivot which can be connected with one of the auxiliary pivots of the base or lower end.

  20. Germany knows mining

    SciTech Connect (OSTI)

    2006-11-15

    Whether it is the nuance of precision or robust rock breaking strength, German suppliers have the expertise. Germany has about 120 companies in the mining equipment industry, employing some 16,000 people. The article describes some recent developments of the following companies: DBT, Liebherr, Atlas Copco, BASF, Boart Longyear, Eickhoff, IBS, Maschinenfabrik Glueckauf, Komatsu, TAKRA, Terex O & R, Thyssen Krupp Foerdertechnik and Wirtgen. 7 photos.

  1. State-of-the-art techniques for backfilling abandoned mine voids

    SciTech Connect (OSTI)

    Walker, J.S. )

    1993-01-01

    Abandoned underground mine openings are susceptible to collapse because of the mining methods used, the character of the overburden, and the typically large, wide entries with minimal roof support. The final effect of the collapse of the underground workings is surface subsidence. To reduce the probability of subsidence, methods to backfill the mine void with various types of materials have been developed. This US Bureau of Mines report describes the available technologies for subsidence abatement and discusses their operation and application. The basis of these abatement methods is the replacement of the mined material with mine waste. Backfilling of mine voids is the most common method of stabilization used to abate subsidence and protect surface structures. Hydraulic flushing and grouting, using remote methods from single or multiple boreholes, are the most often-used methods for the placement of backfill material. Other subsidence abatement techniques are available and may be more appropriate under different conditions. These other techniques include pneumatic stowing, either by in-mine or remote methods, and various point support methods that do not completely fill the mine void and are used for the protection of small areas of the land surface and surface structures. 21 refs., 14 figs.

  2. Spoil handling and reclamation costs at a contour surface mine in steep slope Appalachian topography

    SciTech Connect (OSTI)

    Zipper, C.E.; Hall, A.T.; Daniels, W.L.

    1985-12-09

    Accurate overburden handling cost estimation methods are essential to effective pre-mining planning for post-mining landforms and land uses. With the aim of developing such methods, the authors have been monitoring costs at a contour surface mine in Wise County, Virginia since January 1, 1984. Early in the monitoring period, the land was being returned to its Approximate Original Contour (AOC) in a manner common to the Appalachian region since implementation of the Surface Mining Control and Reclamation Act of 1977 (SMCRA). More recently, mining has been conducted under an experimental variance from the AOC provisions of SMCRA which allowed a near-level bench to be constructed across the upper surface of two mined points and an intervening filled hollow. All mining operations are being recorded by location. The cost of spoil movement is calculated for each block of coal mined between January 1, 1984, and August 1, 1985. Per cubic yard spoil handling and reclamation costs are compared by mining block. The average cost of spoil handling was $1.90 per bank cubic yard; however, these costs varied widely between blocks. The reasons for those variations included the landscape positions of the mining blocks and spoil handling practices. The average reclamation cost was $0.08 per bank cubic yard of spoil placed in the near level bench on the mined point to $0.20 for spoil placed in the hollow fill. 2 references, 4 figures.

  3. Measuring mine roof bolt strains

    SciTech Connect (OSTI)

    Steblay, B.J.

    1986-07-22

    A method is described of measuring the strain in mine roof bolts comprising the steps of: machining a flat portion on the head of the bolt before loading; drilling a reflector hole radially through the diameter of the bolt at a predetermined distance from the bolt head before loading, the ratio of the diameter of the hole to the diameter of the bolt being less than 0.10 to prevent weakening of the loaded bolt; generating an ultrasonic pulse at the flat portion after loading; measuring the time of travel of the ultrasonic pulse reflected from the hole, which increases as the bolt is loaded; and correlating the time measurement of the strain in the bolt.

  4. Ground control for highwall mining

    SciTech Connect (OSTI)

    Zipf, R.K.; Mark, C.

    2007-09-15

    Perhaps the greatest risk to both equipment and personnel associated with highwall mining is from ground control. The two most significant ground control hazards are rock falls from highwall and equipment entrapment underground. In the central Appalachians, where the majority of highwall mining occurs in the USA, hillseams (or mountain cracks) are the most prominent structure that affects highwall stability. The article discusses measures to minimise the risk of failure associated with hillstreams. A 'stuck' or trapped highwall miner, and the ensuring retrieval or recovery operation, can be extremely disruptive to the highwall mining process. Most entrapment, are due to roof falls in the hole. The options for recovery are surface retrieval, surface excavation or underground recovery. Proper pillar design is essential to maintain highwall stability and prevent entrapments. NIOSH has developed the Analysis of Retreat Mining Pillar stability-Highwall Mining (ARMPS-HWM) computer program to help mine planners with this process. 10 figs.

  5. U.S. Energy Information Administration | Annual Coal Report 2014

    U.S. Energy Information Administration (EIA) Indexed Site

    3. Productive Capacity and Capacity Utilization of Underground Coal Mines by State and Mining Method, 2014 (thousand short tons) Continuous 1 Conventional and Other 2 Longwall 3 Total Coal-Producing State Productive Capacity Capacity Utilization Percent Productive Capacity Capacity Utilization Percent Productive Capacity Capacity Utilization Percent Productive Capacity Capacity Utilization Percent Alabama 510 85.35 - - 13,405 90.12 13,915 89.95 Arkansas 240 36.25 - - - - 240 36.25 Colorado 1,000

  6. SAS Output

    U.S. Energy Information Administration (EIA) Indexed Site

    Productive Capacity and Capacity Utilization of Underground Coal Mines by State and Mining Method, 2014" "(thousand short tons)" ,"Continuous1",,"Conventional and Other2",,"Longwall3",,"Total" "Coal-Producing","Productive","Capacity","Productive","Capacity","Productive","Capacity","Productive","Capacity"

  7. SAS Output

    U.S. Energy Information Administration (EIA) Indexed Site

    Recoverable Coal Reserves and Average Recovery Percentage at Producing Underground Coal Mines by State and Mining Method, 2014" "(million short tons)" ,"Continuous1",,"Conventional and Other2",,"Longwall3",,"Total" "Coal-Producing","Recoverable","Average Recovery","Recoverable","Average Recovery","Recoverable","Average Recovery","Recoverable","Average

  8. State-of-the-art techniques for backfilling abandoned mine voids. Information circular/1993

    SciTech Connect (OSTI)

    Walker, J.S.

    1993-01-01

    Abandoned underground mine openings are susceptible to collapse because of the mining methods used, the character of the overburden, and the typically large wide entries with minimal roof support. The final effect of the collapse of the underground workings is surface subsidence. To reduce the probability of subsidence, methods to backfill the mine void with various types of materials have been developed. The paper describes the available technologies for subsidence abatement and discusses their operation and application.

  9. Illinois abandoned mined lands reclamation program: a progress report

    SciTech Connect (OSTI)

    Hickmann, T.J.; Jenkusky, S.M.; Massie, S.

    1985-12-01

    The Illinois Abandoned Mined Lands Reclamation Council (AMLRC), created in 1975, is responsible for the abatement of hazardous and environmental problems associated with pre-law abandoned coal mines throughout the State. The availability of federal funds for reclamation, through passage of the Surface Mining Control and Reclamation Act of 1977 (SMCRA), greatly expanded the program. With funds provided through early cooperative agreements and current annual grants from the federal Office of Surface Mining (OSM), the State has reclaimed, or is currently reclaiming, 182 mine sites and has assisted OSM in the abatement of 67 emergency situations. This paper reviews the progress made by the AMLRC in dealing with the State's abandoned mine problems. Specifically, the numbers and types of problem sites reclaimed annually, their costs, and reclamation methods are identified. Progress of the program relative to the entire State's abandoned mine problems is reviewed. The effects of other reclamation factors, such as natural revegetation, remaining privately-funded reclamation, and secondary carbon recovery, on the overall scope of the State's program are also examined. General comments are made concerning grant preparation, State-OSM cooperation and AML-Inventory control. Selected reclamation projects and techniques are also discussed. 11 references, 3 tables.

  10. Education Roadmap for Mining Professionals

    SciTech Connect (OSTI)

    none,

    2002-12-01

    This document represents the roadmap for education in the U.S. mining industry. It was developed based on the results of an Education Roadmap Workshop sponsored by the National Mining Association in conjunction with the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Office of Industrial Technologies. The Workshop was held February 23, 2002 in Phoenix, Arizona.

  11. Marine clathrate mining and sediment separation

    DOE Patents [OSTI]

    Borns, David J.; Hinkebein, Thomas E.; Lynch, Richard W.; Northrop, David A.

    2001-01-01

    A method and apparatus for mining of hydrocarbons from a hydrocarbon-containing clathrate such as is found on the ocean floor. The hydrocarbon containing clathrate is disaggregated from sediment by first disrupting clathrate-containing strata using continuous mining means such as a rotary tilling drum, a fluid injector, or a drill. The clathrate-rich portion of sediment thus disrupted from the sea floor strata are carried through the apparatus to regions of relative lower pressure and/or relative higher temperature where the clathrate further dissociates into component hydrocarbons and water. The hydrocarbon is recovered with the assistance of a gas that is injected and buoys the hydrocarbon containing clathrate helping it to rise to regions of lower pressure and temperature where hydrocarbon is released. The sediment separated from the hydrocarbon returns to the ocean floor.

  12. Mining Industry Energy Bandwidth Study

    SciTech Connect (OSTI)

    none,

    2007-07-01

    The Industrial Technologies Program (ITP) relies on analytical studies to identify large energy reduction opportunities in energy-intensive industries and uses these results to guide its R&D portfolio. The energy bandwidth illustrates the total energy-saving opportunity that exists in the industry if the current processes are improved by implementing more energy-efficient practices and by using advanced technologies. This bandwidth analysis report was conducted to assist the ITP Mining R&D program in identifying energy-saving opportunities in coal, metals, and mineral mining. These opportunities were analyzed in key mining processes of blasting, dewatering, drilling, digging, ventilation, materials handling, crushing, grinding, and separations.

  13. Mining and Reclamation Technology Symposium

    SciTech Connect (OSTI)

    None Available

    1999-06-24

    The Mining and Reclamation Technology Symposium was commissioned by the Mountaintop Removal Mining/Valley Fill Environmental Impact Statement (EIS) Interagency Steering Committee as an educational forum for the members of the regulatory community who will participate in the development of the EIS. The Steering Committee sought a balanced audience to ensure the input to the regulatory community reflected the range of perspectives on this complicated and emotional issue. The focus of this symposium is on mining and reclamation technology alternatives, which is one of eleven topics scheduled for review to support development of the EIS. Others include hydrologic, environmental, ecological, and socio-economic issues.

  14. week's Southwest Regional Mine Rescue Competition.

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    winning WIPP Blue mine rescue team competes during last week's Southwest Regional Mine Rescue Competition. WIPP UPDATE: April 15, 2016 WIPP Blue Mine Rescue Team Wins Local Competition The Waste Isolation Pilot Plant (WIPP) Blue mine rescue team took top honors last week in the Southwest Regional Mine Rescue Contest, held in Carlsbad, NM. The WIPP Blue outdueled five other teams from the region, including the defending national champion WIPP Red team, to win first place overall in the

  15. Proceedings of the sixteenth international symposium on mine planning and equipment selection (MPES 2007) and the tenth international symposium on environmental issues and waste management in energy and mineral production (SWEMP 2007)

    SciTech Connect (OSTI)

    Singhal, R.K.; Fytas, K.; Jongsiri, S.; Ge, Hao

    2007-07-01

    Papers presented at MPES 2007 covered: coal mining and clean coal processing technologies; control, design and planning of surface and underground mines; drilling, blasting and excavation engineering; mining equipment selection; automation and information technology; maintenance and production management for mines and mining systems; health, safety and environment; cost effective methods of mine reclamation; mine closure and waste disposal; and rock mechanics and geotechnical issues. Papers from SWEMP 2007 discussed methods and technologies for assessing, minimizing and preventing environmental problems associated with mineral and energy production. Topics included environmental impacts of coal-fired power projects; emission control in thermal power plants; greenhouse gas abatement technologies; remediation of contaminated soil and groundwater; environmental issues in surface and underground mining of coal, minerals and ores; managing mine waste and mine water; and control of effluents from mineral processing, metallurgical and chemical plants.

  16. Mined Land Reclamation on DOE's Uranium Lease Tracts, Southwestern...

    Office of Environmental Management (EM)

    Mined Land Reclamation on DOE's Uranium Lease Tracts, Southwestern Colorado Mined Land Reclamation on DOE's Uranium Lease Tracts, Southwestern Colorado Mined Land Reclamation on...

  17. Westinghouse Earns Mine Safety Award for Exceptional Underground...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    On September 19, New Mexico State Inspector of Mines Gilbert Miera and the New Mexico Mining Association presented Westinghouse with the "Mine Operator of the Year" award. The...

  18. Shahe Huada Mining Co Ltd | Open Energy Information

    Open Energy Info (EERE)

    Shahe Huada Mining Co Ltd Jump to: navigation, search Name: Shahe Huada Mining Co Ltd Place: Hebei Province, China Sector: Biomass Product: Shahe-based private mining company....

  19. ITP Mining: The Future Begins with Mining- A Vision of the Mining Industry of the Future

    Broader source: Energy.gov [DOE]

    This vision document details long-term goals and objectives for the mining industry. Stemming from this vision document, targeted technology roadmaps were developed that describe pathways of research to achieve the vision goals.

  20. Crisis in American mining

    SciTech Connect (OSTI)

    Not Available

    1984-05-01

    The crisis in American mining is discussed. The discussion focuses on the outlook for coal in the overall energy picture. Because of the Arab oil embargo of 1973, the Iranian disruption of 1979, and the tenfold increase in oil prices over the past decade, radical changes have taken place in energy supply and demand patterns. Two of the most important of these changes relate to investment. First, large investments have been made in energy-efficient plants, equipment, buildings, and vehicles. Their effect will restrain energy demand growth for the foreseeable future. Second, investments have been made in fuel-switching, from oil to coal and nuclear power. As a result the oil demand at the end of this century will be at approximately the same level as it is today. Natural gas demand is also likely to be flat. Coal demand, on the other hand, is expected to increase steadily over the long term. Recent conditions in the coal industry are reviewed, and a specific 10-year forecast is given.

  1. Mine roof supporting system

    SciTech Connect (OSTI)

    Curry, P.F.

    1981-06-23

    A stabilizing arrangement for mine roof support systems of the type in which a series of support units, each including a transverse beam supported at opposite ends by extensible props, are interconnected by extensible struts in a manner to be selfadvancing by alternate retraction of support units from a roof supporting condition and extension of the struts to advance such retracted units relative to others of such units which are in an extended roof engaging condition. The connection of each prop to the beam in a given unit is pivotal to allow deflection of the beam and props of a supporting unit from a normal perpendicular relationship under load. The stabilizing means restores the props and beam to a normal perpendicular relationship for advancing movement of each support unit. The supporting units are further stabilized relative to the struts by prop supporting brackets permitting canting movement of the props from a perpendicular relationship with respect to the struts but maintaining the props in a generally upright position for unit advance.

  2. ITP Mining: Energy and Environmental Profile of the U.S. Mining Industry (December 2002)

    Office of Energy Efficiency and Renewable Energy (EERE)

    The U.S. Department of Energy and the National Mining Association are working in partnership to implement the Mining Industry of the Future strategy.

  3. Surface mining: State management of abandoned mine land funds

    SciTech Connect (OSTI)

    Not Available

    1987-01-01

    The Surface Mining Control and Reclamation Act of 1977 promotes the reclamation of areas severely damaged in the past by coal mining operations. GAO reviewed the reclamation programs in Colorado, Kentucky, Pennsylvania, West Virginia, and Wyoming and found that they implemented financial control procedures and practices to ensure that the expenditures of reclamation funds are proper. Only one state, however, is complying with all related grant payment, audit, and inventory requirements. The states are generally reclaiming eligible, high priority projects as required under the act and are managing their reclamation projects in compliance with federal requirements.

  4. Automated Analysis of Renewable Energy Datasets ('EE/RE Data Mining')

    SciTech Connect (OSTI)

    Bush, Brian; Elmore, Ryan; Getman, Dan; Inman, Daniel; Kalendra, Eric

    2013-06-13

    This poster illustrates methods to substantially improve the understanding of renewable energy data sets and the depth and efficiency of their analysis through the application of statistical learning methods ('data mining') in the intelligent processing of these often large and messy information sources. The six examples apply methods for anomaly detection, data cleansing, and pattern mining to time-series data (measurements from metering points in buildings) and spatiotemporal data (renewable energy resource datasets).

  5. Coal mine methane global review

    SciTech Connect (OSTI)

    2008-07-01

    This is the second edition of the Coal Mine Methane Global Overview, updated in the summer of 2008. This document contains individual, comprehensive profiles that characterize the coal and coal mine methane sectors of 33 countries - 22 methane to market partners and an additional 11 coal-producing nations. The executive summary provides summary tables that include statistics on coal reserves, coal production, methane emissions, and CMM projects activity. An International Coal Mine Methane Projects Database accompanies this overview. It contains more detailed and comprehensive information on over two hundred CMM recovery and utilization projects around the world. Project information in the database is updated regularly. This document will be updated annually. Suggestions for updates and revisions can be submitted to the Administrative Support Group and will be incorporate into the document as appropriate.

  6. WIPP Takes Second in Mine Rescue Competition | Department of Energy

    Office of Environmental Management (EM)

    Takes Second in Mine Rescue Competition WIPP Takes Second in Mine Rescue Competition June 30, 2014 - 12:00pm Addthis WIPP Mine Rescue Red Team members’ actions are evaluated during a simulated mine rescue disaster. WIPP Mine Rescue Red Team members' actions are evaluated during a simulated mine rescue disaster. WIPP mine rescue team members simulate the proper first aid response to stabilize injuries. WIPP mine rescue team members simulate the proper first aid response to stabilize

  7. Mine subsidence in Illinois: facts for the homeowner considering insurance

    SciTech Connect (OSTI)

    DuMontelle, P.B.; Bradford, S.C.; Bauer, R.A.; Killey, M.M.

    1981-08-01

    Subsidence is the sinking of land surface, commonly resulting from underground mining. In Illinois, property damage has been sufficiently severe that a state law was enacted to provide subsidence insurance for homeowners. This publication has been prepared for homeowners in Illinois: (1) to inform them whether they live in subsidence-prone areas, (2) to aid them in understanding some frequently encountered effects of mine subsidence as well as problems sometimes mistaken for mine subsidence, and (3) to suggest further sources of information. Although the new subsidence insurance program for homeowners in mining areas prompted the writing of this report, we do not attempt to explain the details of the insurance program. Our purpose is to explain the causes and the nature of subsidence and discuss ways to minimize damage caused by subsidence. About 750,000 acres of Illinois land have been undermined for coal, and many homeowners are concerned about the effects underground mining may d at nine areas alalitative methods are presented. Chapter Five presents conclusions and suggestions for future research.

  8. Modeling Spatial Dependencies and Semantic Concepts in Data Mining

    SciTech Connect (OSTI)

    Vatsavai, Raju

    2012-01-01

    Data mining is the process of discovering new patterns and relationships in large datasets. However, several studies have shown that general data mining techniques often fail to extract meaningful patterns and relationships from the spatial data owing to the violation of fundamental geospatial principles. In this tutorial, we introduce basic principles behind explicit modeling of spatial and semantic concepts in data mining. In particular, we focus on modeling these concepts in the widely used classification, clustering, and prediction algorithms. Classification is the process of learning a structure or model (from user given inputs) and applying the known model to the new data. Clustering is the process of discovering groups and structures in the data that are ``similar,'' without applying any known structures in the data. Prediction is the process of finding a function that models (explains) the data with least error. One common assumption among all these methods is that the data is independent and identically distributed. Such assumptions do not hold well in spatial data, where spatial dependency and spatial heterogeneity are a norm. In addition, spatial semantics are often ignored by the data mining algorithms. In this tutorial we cover recent advances in explicitly modeling of spatial dependencies and semantic concepts in data mining.

  9. Technology experience and economics of oil shale mining in Estonia

    SciTech Connect (OSTI)

    Fraiman, J.; Kuzmiv, I. [Estonian Oil Shale State Co., Jyhvi (Estonia). Scientific Research Center

    1995-11-01

    The exhaustion of fuel-energy resources became an evident problem of the European continent in the 1960s. Careful utilization of their own reserves of coal, oil, and gas (Germany, France, Spain) and assigned shares of imports of these resources make up the strategy of economic development of the European countries. The expansion of oil shale utilization is the most topical problem. The experience of mining oil shale deposits in Estonia and Russia, in terms of the practice and the economic results, is reviewed in this article. The room-and-pillar method of underground mining and the open-cut technology of clearing the ground ensure the fertility of a soil. The economics of underground and open pit oil shale mines is analyzed in terms of natural, organizational, and technical factors. These analyses are used in the planning and management of oil shale mining enterprises. The perspectives of the oil shale mining industry of Estonia and the economic expediency of multiproduction are examined. Recommendations and guidelines for future industrial utilization of oil shale are given in the summary.

  10. MINES ParisTech | Open Energy Information

    Open Energy Info (EERE)

    it. MINES ParisTech was created in 1783, when the exploitation of mines was a high-technology industry. Quite naturally, the skills of the School followed the development of...

  11. Potential highwall use by raptors in coal mine reclamation

    SciTech Connect (OSTI)

    Waage, B.

    1990-12-31

    In 1982, Western Energy Company`s Rosebud Mine, located in southeastern Montana, received legal exception, {open_quotes}a first{close_quotes} in Montana to leave a standing mine highwall extending a native bluff. This bluff extension stands 110 feet high and 900 feet long. Normally, all highwalls by law are reduced to a 5:1 slope. This legal exception was accomplished with the support of several governmental agencies and was justified on the highwalls potential value for raptors. Enhancement measures undertaken on the highwall included the construction of three artificial eryies and the release of young prairie falcons (Falco mexicanus) employing hacking methods of the Peregrine Fund. The hack is now in its fourth year with a total of 46 young falcons having been released. Opportunities exist for creating a more diverse habitat for raptors and other cliff obligate species on reclaimed mine lands in the west. It is believed that this practical approach should be explored.

  12. Turnaround team revitalizes mining operations

    SciTech Connect (OSTI)

    Buchsbaum, L.

    2005-11-01

    Starting from scratch, the Broe Companies' Century Coal trains the next generation. The article describes how the newly created Century Coal LLC, controlled by Denver-based Broe Companies investment firm, is rebuilding and expanding its highwall mining operations, increasing production from a current 1 million tons to 5 to 6 million tons in 2006 and 2007. The company has a $100,000 outreach program with 95% of these funds going to local communities. Present coal mining operations are spread around Bell, Clay, Harlan Knox and Leslie Counties. A priority is the renovation of the WenLar preparation plant in Bell County. 5 photos.

  13. Logistics background study: underground mining

    SciTech Connect (OSTI)

    Hanslovan, J. J.; Visovsky, R. G.

    1982-02-01

    Logistical functions that are normally associated with US underground coal mining are investigated and analyzed. These functions imply all activities and services that support the producing sections of the mine. The report provides a better understanding of how these functions impact coal production in terms of time, cost, and safety. Major underground logistics activities are analyzed and include: transportation and personnel, supplies and equipment; transportation of coal and rock; electrical distribution and communications systems; water handling; hydraulics; and ventilation systems. Recommended areas for future research are identified and prioritized.

  14. Mining Industry Roadmap for Crosscutting Technologies

    SciTech Connect (OSTI)

    none,

    1999-05-01

    Technology roadmaps are envisioned in several areas, and begin with a Mining Industry Roadmap for Crosscutting Technologies.

  15. Iowa State Mining and Mineral Resources Research Institute

    SciTech Connect (OSTI)

    Not Available

    1990-08-01

    This final report describes the activities of the Iowa State Mining and Mineral Resources Research Institute (ISMMRRI) at Iowa State University for the period July 1, 1989, to June 30, 1990. Activities include research in mining- and mineral-related areas, education and training of scientists and engineers in these fields, administration of the Institute, and cooperative interactions with industry, government agencies, and other research centers. During this period, ISMMRRI has supported research efforts to: (1) Investigate methods of leaching zinc from sphalerite-containing ores. (2) Study the geochemistry and geology of an Archean gold deposit and of a gold-telluride deposit. (3) Enchance how-quality aggregates for use in construction. (4) Pre-clean coal by triboelectric charging in a fluidized-bed. (5) Characterize the crystal/grain alignment during processing of yttrium-barium-copper-perovskite (1-2-3) superconductors. (5) Study the fluid inclusion properties of a fluorite district. (6) Study the impacts of surface mining on community planning. (7) Assess the hydrophobicity of coal and pyrite for beneficiation. (8) Investigate the use of photoacoustic absorption spectroscopy for monitoring unburnt carbon in the exhaust gas from coal-fired boilers. The education and training program continued within the interdepartmental graduate minor in mineral resources includes courses in such areas as mining methods, mineral processing, industrial minerals, extractive metallurgy, coal science and technology, and reclamation of mined land. In addition, ISMMRRI hosted the 3rd International Conference on Processing and Utilization of High-Sulfur Coals in Ames, Iowa. The Institute continues to interact with industry in order to foster increased cooperation between academia and the mining and mineral community.

  16. Televised remote control system of a continuous mining machine

    SciTech Connect (OSTI)

    Lansberry, J.B.

    1981-08-04

    A method of recovering particulate material from a seam of such material within the earth bounded above and below by different material which comprises the steps of positioning in mining relation to the seam a continuous mining machine having a power driven mechanism thereon for moving the machine through successive seam material cutting cycles which include an advancing movement along a mined entry within the seam in a direction toward the working face of the seam; illuminating portions of the space surrounding the continuous mining machine including portions of the working face disposed forwardly thereof and adjacent portions of the roof, floor and side walls of the mined entry rearwardly of the working face; establishing electromagnetic signals indicative of the appearance of the illuminated portions of the working face of the seam and the adjacent portions of the roof, floor and side walls; transmitting the established electromagnetic signals to a remote control station; converting at the remote control station the transmitted electromagnetic signals to a continuous picture of the appearance of at least a selected portion of the illuminated portions of the working face of the seam and the adjacent portions of the roof, floor and side walls; and controlling from the remote control station the cutting cycle of the continuous mining machine so that the material cut during a cycle is cut from the seam up to the different material defining the roof and down to the different material defining the floor based upon visually distinguishing between the material of the seam and the different material which forms the roof and floor by viewing the continuous picture provided at the remote control station and apparatus for carrying out the method.

  17. Program of mining research, 1998--1999

    SciTech Connect (OSTI)

    1998-12-31

    The paper contains: Reflections on 1998; Project summaries; Noise; Injury prevention, ergonomics, and human factors; Surface, sand and gravel, and stone mines; Hazard detection and warning devices; Ground control -- metal/nonmetal mines; Ground control -- coal mines; Explosion and fire detection and suppression; Methane detection; Electrical hazards; Emerging technologies; Surveillance; Construction; Training and education; and Communication activity.

  18. Research on air sprays and unique foam application methods. Thirty third monthly report, May 1-31, 1984

    SciTech Connect (OSTI)

    Not Available

    1984-07-19

    The construction of the longwall mockup gallery has been completed. Testing has been completed and the data analyzed for the air sprays system. A maximum of 75% air spray effectiveness was obtained from the data analysis. Laboratory tests on pick face foaming and flushing foam through scroll sprays were successfully completed. The first underground testing of the foam system through the scroll sprays as well as external sprays located on the lead ranging arm was conducted. Data analysis revealed a 58% reduction in dust concentration at the operator's position for the 40 gpm foam system as compared to the existing 80 gpm water spray system. Dust samples analyzed by Consol personnel provided a greater than 60% reduction of dust concentration at the operator's position. The second field test of the foam system was very successful and the mining company was considering using the system on a long-term basis. However, the operating cost of the system was higher than the cost the mining company was willing to afford, and consequently further operation of the foam system was suspended.

  19. Corner-cutting mining assembly

    DOE Patents [OSTI]

    Bradley, J.A.

    1981-07-01

    This invention resulted from a contract with the United States Department of Energy and relates to a mining tool. More particularly, the invention relates to an assembly capable of drilling a hole having a square cross-sectional shape with radiused corners. In mining operations in which conventional auger-type drills are used to form a series of parallel, cylindrical holes in a coal seam, a large amount of coal remains in place in the seam because the shape of the holes leaves thick webs between the holes. A higher percentage of coal can be mined from a seam by a means capable of drilling holes having a substantially square cross section. It is an object of this invention to provide an improved mining apparatus by means of which the amount of coal recovered from a seam deposit can be increased. Another object of the invention is to provide a drilling assembly which cuts corners in a hole having a circular cross section. These objects and other advantages are attained by a preferred embodiment of the invention.

  20. Corner-cutting mining assembly

    DOE Patents [OSTI]

    Bradley, John A.

    1983-01-01

    A mining assembly includes a primary rotary cutter mounted on one end of a support shaft and four secondary rotary cutters carried on the same support shaft and positioned behind the primary cutters for cutting corners in the hole cut by the latter.

  1. Robot to the Mine Rescue

    Broader source: Energy.gov [DOE]

    To increase the speed of rescue efforts, scientists and engineers at the Energy Department’s Sandia National Laboratories recently developed a new robot, called the Gemini-Scout Mine Rescue Robot, that quickly finds dangers and provides relief to trapped miners.

  2. The quest data mining system

    SciTech Connect (OSTI)

    Agrawal, R.; Mehta, M.; Shafer, J.; Srikant, R.

    1996-12-31

    The goal of the Quest project at the IBM Almaden Research center is to develop technology to enable a new breed of data-intensive decision-support applications. This paper is a capsule summary of the current functionality and architecture of the Quest data mining System.

  3. Mining into the new millennium

    SciTech Connect (OSTI)

    Buchsbaum, L.

    2009-06-15

    After more than 3 years of production and a billion tons of coal shipped, Foundation Coal West, a subsidiary of Foundation Coal Holding Inc., continues to operate two of the original surface mines in Wyoming's Powder River Basin. The article describes equipment (conveyors, trucks, surface miners etc.) deployed at Belle Ayr and Eagle Butte PRB operations. 3 photos.

  4. Spatial and Spatiotemporal Data Mining: Recent Advances

    SciTech Connect (OSTI)

    Shekhar, Shashi; Vatsavai, Raju; Celik, Mete

    2008-01-01

    Explosive growth in geospatial data and the emergence of new spatial technologies emphasize the need for automated discovery of spatial knowledge. Spatial data mining is the process of discovering interesting and previously unknown, but potentially useful patterns from large spatial databases. The complexity of spatial data and intrinsic spatial relationships limits the usefulness of conventional data mining techniques for extracting spatial patterns. In this chapter we explore the emerging field of spatial data mining, focusing on four major topics: prediction and classification, outlier detection, co-location mining, and clustering. Spatiotemporal data mining is also briefly discussed.

  5. Mines in the Four Corners anticipate growth

    SciTech Connect (OSTI)

    Buchsbaum, L.

    2008-02-15

    Productive mines in the southwest deplete reserves, while the government drags its heels on new power projects. Production in Arizona and New Mexico has fallen 18% over the last four years to 34.1 million tons. With Chevron Mining's McKinley mine rapidly depleting its reserves the industry will continue to contract. In the last three years at least three large mines in the Four Corners have terminated operations. Three others remain captive operations: BHP Billiton's San Juan Underground and Navajo Surface operations and Peabody Energy's Kayenta surface mine. In 2006 the Black Mesa mine stopped producing coal. These four mines are isolated from the national railways. Peabody's new El Segundo surface mine near Grants, NM is increasing production. If the planned $3 billion Desert Rock coal-fired power plant is built this will present a new market for the Navajo mine. The article gives details about the state of the aforementioned mines and of the new King II coal mine on the northern periphery of the San Juan basin and discusses the state of plans for the Desert Rock Energy Project. 5 photos.

  6. Brine disposal process for Morcinek coal mine

    SciTech Connect (OSTI)

    Tait, J.H.

    1995-04-01

    This paper describes the work to develop a commercial brine disposal process for the Morcinek mine, located 45 km south of the city of Katowice in Poland. Currently, brine is discharged into the Odra river and methane from the mine is released into the atmosphere. The process would use the released methane and convert a large percentage of the brine into potable water for commercial use. Thus, the proposed process has two environmental benefits. The brine salinity is about 31,100 ppm. Major brine components are Na (10,300 ppm), Ca (1,170 ppm), Mg (460 ppm), Cl (18,500 ppm) and SO{sub 4}{sup 2-} (252 ppm). Present in smaller amounts are K, S, Sr, B, Ba and NO{sub 3}. The process integrates a reverse osmosis (RO) unit and a submerged combustion evaporator. Extensive studies made at the Lawrence Livermore National Laboratory established the pretreatment method of the brine before it enters the RO unit. Without adequate pretreatment, mineral phases in the brine would become super-saturated and would precipitate in the RO unit. The pretreatment consists of first adding sodium carbonate to increase both the pH and the carbonate concentration of the brine. This addition causes precipitation of carbonate solids containing Ca, Mg, Sr, and Ba. After filtration of these precipitates, the fluid is acidified with HCl to prevent precipitation in the RO unit as the brine increases in salinity.

  7. Mining Industry of the Future Vision: The Future Begins with Mining

    SciTech Connect (OSTI)

    none,

    1998-09-01

    The Mining Industry of the Future was started in June 1998 when the Chairman of the National Mining Association and the Secretary of Energy entered into a Compact to pursue a collaborative technology research partnership. After the Compact signing, the mining industry developed its vision document, The Future Begins with Mining, A Vision of the Mining Industry of the Future, in September 1998. This vision document lists long-term goals for the mining industry. Stemming from this vision document, targeted technology roadmaps were developed that describe pathways of research to achieve the vision goals.

  8. Mining machine having vibration sensor

    SciTech Connect (OSTI)

    Peterson, C.R.

    1987-04-07

    This patent describes a mining machine having means for sensing property variations of the materials associated with a seam of a mine comprising: a cutting tool including a member rotatable about an axis, at least one cutter carried by the rotatable member at a point spaced from the axis for cutting material from the seam, a conductor rod carried by the rotatable member and held in releasable engagement with the cutter, the rod extending to the axis of the rotatable member to conduct to the axis, strain waves which are induced by variations in cutter vibration as the cutter encounters property variations of the materials associated with the seam, and a transducer located at the axis of the rotatable member in communication with the conductor rod to convert the strain waves in the rod to electric signals.

  9. WIRELESS MINE-WIDE TELECOMMUNICATIONS TECHNOLOGY

    SciTech Connect (OSTI)

    Zvi H. Meiksin

    2004-03-01

    A comprehensive mine-wide, two-way wireless voice and data communication system for the underground mining industry was developed. The system achieves energy savings through increased productivity and greater energy efficiency in meeting safety requirements within mines. The mine-wide system is comprised of two interfaced subsystems: a through-the-earth communications system and an in-mine communications system. The mine-wide system permits two-way communication among underground personnel and between underground and surface personnel. The system was designed, built, and commercialized. Several systems are in operation in underground mines in the United States. The use of these systems has proven they result in considerable energy savings. A system for tracking the location of vehicles and people within the mine was also developed, built and tested successfully. Transtek's systems are being used by the National Institute of Occupational Safety and Health (NIOSH) in their underground mine rescue team training program. This project also resulted in a spin-off rescue team lifeline and communications system. Furthermore, the project points the way to further developments that can lead to a GPS-like system for underground mines allowing the use of autonomous machines in underground mining operations, greatly reducing the amount of energy used in these operations. Some products developed under this program are transferable to applications in fields other than mining. The rescue team system is applicable to use by first responders to natural, accidental, or terrorist-caused building collapses. The in-mine communications system can be installed in high-rise buildings providing in-building communications to security and maintenance personnel as well as to first responders.

  10. Exploration and mining geology. Second edition

    SciTech Connect (OSTI)

    Peters, W.C.

    1987-01-01

    Using the concepts and practices of applied geology as its central theme, here is a balanced and comprehensive treatment of the geological, geochemical, geophysical, and economic elements of exploration and mining. The author offers an overview of the methods and aims in mineral exploration and production and gives coverage of the geologic principles of ore deposits and the geomorphic environment. The text deals with ''hard'' minerals and the nonfluid sources of materials and energy in the continental masses and in ocean basins. This edition has been expanded to include recent advances in applications of satellite imagery, lithogeochemical surveys, isotope geochemistry, and other developments in the field. It also covers current uses of computers in mineral exploration programs and features case histories, a current references section, and financial data.

  11. Injury experience in coal mining, 1986

    SciTech Connect (OSTI)

    Not Available

    1987-01-01

    This Mine Safety and Health Administration (MSHA) informational report reviews in detail the occupational injury and illness experience of coal mining in the United States for 1986. Data reported by operators of mining establishments concerning work injuries are summarized by work location, accident classification, part of body injured, nature of injury, occupation, and anthracite or bituminous coal. Related information on employment, worktime, and operating activity also is presented. Data reported by independent contractors performing certain work at mining locations are depicted separately in this report. For ease of comparison between coal mining and the metal and nonmetal mineral mining industries, summary reference tabulations are included at the end of both the operator and the contractor sections of this report. 1 fig., 46 tabs.

  12. Injury experience in coal mining, 1987

    SciTech Connect (OSTI)

    Not Available

    1988-01-01

    This Mine Safety and Health Administration (MSHA) informational report reviews in detail the occupational injury and illness experience of coal mining in the United States for 1987. Data reported by operators of mining establishments concerning work injuries are summarized by work location, accident classification, part of body injured, nature of injury, occupation, and anthracite or bituminous coal. Related information on employment, worktime, and operating activity also is presented. Data reported by independent contractors performing certain work at mining locations are depicted separately in this report. For ease of comparison between coal mining and the metal and nonmetal mineral mining industries, summary reference tabulations are included at the end of both the operator and the contractor sections of this report. 3 figs., 46 tabs.

  13. Injury experience in coal mining, 1988

    SciTech Connect (OSTI)

    Not Available

    1989-01-01

    This Mine Safety and Health Administration (MSHA) informational report reviews in detail the occupational injury and illness experience of coal mining in the United States for 1988. Data reported by operators of mining establishments concerning work injuries are summarized by work location, accident classification, part of body injured, nature of injury, occupation, and anthracite or bituminous coal. Related information on employment, worktime, and operating activity also is presented. Data reported by independent contractors performing certain work at mining locations are depicted separately in this report. For ease of comparison between coal mining and the metal and nonmetal mineral mining industries, summary reference tabulations are included at the end of both the operator and the contractor sections of this report. 3 figs., 23 tabs.

  14. Injury experience in metallic mineral mining, 1992

    SciTech Connect (OSTI)

    Not Available

    1994-05-01

    This Mine Safety and Health Administration (MSHA) informational report reviews in detail the occupational injury and illness experience of metallic mineral mining in the United States for 1992. Data reported by operators of mining establishments concerning work injuries are summarized by work location, accident classification, part of body injured, nature of injury, occupation, and principal type of mineral. Related information on employment, worktime, and operating activity also is presented. Data reported by independent contractors performing certain work at mining locations are depicted separately in this report. For ease of comparison with other metal and nonmetallic mineral mining industries and with coal mining, summary reference tabulations are included at the end of both the operator and the contractor sections of this report.

  15. Injury experience in stone mining, 1992

    SciTech Connect (OSTI)

    Not Available

    1994-05-01

    This Mine Safety and Health Administration (MSHA) informational report reviews in detail the occupational injury and illness experience of stone mining in the United States for 1992. Data reported by operators of mining establishments concerning work injuries are summarized by work location, accident classification, part of body injured, nature of injury, occupation, and principal type of mineral. Related information on employment, worktime, and operating activity also is presented. Data reported by independent contractors performing certain work at mining locations are depicted separately in this report. For ease of comparison with other metal and nonmetallic mineral mining industries and with coal mining, summary reference tabulations are included at the end of both the operator and the contractor sections of this report.

  16. Injury experience in metallic mineral mining, 1991

    SciTech Connect (OSTI)

    Not Available

    1993-10-01

    This Mine Safety and Health Administration (MSHA) informational report reviews in detail the occupational injury and illness experience of metallic mineral mining in the United States for 1991. Data reported by operators of mining establishments concerning work injuries are summarized by work location, accident classification, part of body injured, nature of injury, occupation, and principal type of mineral. Related information on employment, worktime, and operating activity also is presented. Data reported by independent contractors performing certain work at mining locations are depicted separately in this report. For ease of comparison with other metal and nonmetallic mineral mining industries and with coal mining, summary reference tabulations are included at the end of both the operator and the contractor sections of this report.

  17. Injury experience in metallic mineral mining, 1987

    SciTech Connect (OSTI)

    Not Available

    1988-01-01

    This Mine Safety and Health Administration (MSHA) informational report reviews in detail the occupational injury and illness experience of metallic mineral mining in the United States for 1987. Data reported by operators of mining establishments concerning work injuries are summarized by work location, accident classification, part of body injured, nature of injury, occupation, and principal type of mineral. Related information on employment, worktime, and operating activity also is presented. Data reported by independent contractors performing certain work at mining locations are depicted separately in this report. For ease of comparison with other metal and nonmetallic mineral mining industries and with coal mining, summary reference tabulations are included at the end of both the operator and the contractor sections of this report. 3 figs., 44 tabs.

  18. Injury experience in coal mining, 1990

    SciTech Connect (OSTI)

    1991-01-01

    This Mine Safety and Health Administration (MSHA) informational report reviews in detail the occupational injury and illness experience of coal mining in the United States for 1990. Data reported by operators of mining establishments concerning work injuries are summarized by work location, accident classification, part of body injured, nature of injury, occupation, and anthracite or bituminous coal. Related information on employment, worktime, and operating activity also is presented. Data reported by independent contractors performing certain work at mining locations are depicted separately in this report. For ease of comparison between coal mining and the metal and nonmetal mineral mining industries, summary reference tabulations are included at the end of both the operator and the contractor sections of this report.

  19. Injury experience in metallic mineral mining, 1990

    SciTech Connect (OSTI)

    Not Available

    1991-12-31

    This Mine Safety and Health Administration (MSHA) informational report reviews in detail the occupational injury and illness experience of metallic mineral mining in the United States for 1990. Data reported by operators of mining establishments concerning work injuries are summarized by work location, accident classification, part of body injured, nature of injury, occupation, and principal type of mineral. Related information on employment, worktime, and operating activity also is presented. Data reported by independent contractors performing certain work at mining locations are depicted separately in this report. For ease of comparison with other metal and nonmetallic mineral mining industries and with coal mining, summary reference tabulations are included at the end of both the operator and the contractor sections of this report.

  20. Injury experience in coal mining, 1992

    SciTech Connect (OSTI)

    Reich, R.B.; Hugler, E.C.

    1994-05-01

    This Mine Safety and Health Administration (MSHA) informational report reviews in detail the occupational injury and illness experience of coal mining in the United States for 1992. Data reported by operators of mining establishments concerning work injuries are summarized by work location, accident classification, part of body injured, nature of injury, occupation, and anthracite or bituminous coal. Related information on employment, worktime, and operating activity also is presented. Data reported by independent contractors performing certain work at mining locations are depicted separately in this report. For ease of comparison between coal mining and the metal and nonmetal mineral mining industries, summary reference tabulations are included at the end of both the operator and the contractor sections of this report.

  1. Injury experience in metallic mineral mining, 1988

    SciTech Connect (OSTI)

    Not Available

    1989-01-01

    This Mine Safety and Health Administration (MSHA) informational report reviews in detail the occupational injury and illness experience of metallic mineral mining in the United States of 1988. Data reported by operators of mining establishments concerning work injuries are summarized by work location, accident classification, part of body injured, nature of injury, occupation, and principal type of mineral. Related information on employment, worktime, and operating activity also is presented. Data reported by independent contractors performing certain work at mining locations are depicted separately in this report. For ease of comparison with other metal and nonmetallic mineral mining industries and with coal mining, summary reference tabulations are included at the end of both the operator and the contractor sections of this report. 3 figs., 46 refs.

  2. Injury experience in metallic mineral mining, 1990

    SciTech Connect (OSTI)

    Not Available

    1991-01-01

    This Mine Safety and Health Administration (MSHA) informational report reviews in detail the occupational injury and illness experience of metallic mineral mining in the United States for 1990. Data reported by operators of mining establishments concerning work injuries are summarized by work location, accident classification, part of body injured, nature of injury, occupation, and principal type of mineral. Related information on employment, worktime, and operating activity also is presented. Data reported by independent contractors performing certain work at mining locations are depicted separately in this report. For ease of comparison with other metal and nonmetallic mineral mining industries and with coal mining, summary reference tabulations are included at the end of both the operator and the contractor sections of this report.

  3. Injury experience in stone mining, 1990

    SciTech Connect (OSTI)

    Not Available

    1990-12-31

    This Mine Safety and Health Administration (MSHA) informational report reviews in detail the occupational injury and illness experience of stone mining in the united States for 1990. Data reported by operators of mining establishments concerning work injuries are summarized by work location, accident classification, part of body injured, nature of injury, occupation, and principal type of mineral. Related information on employment, worktime, and operating activity also is presented. Data reported by independent contractors performing certain work at mining locations are depicted separately in this report. For ease of comparison with other metal and nonmetallic mineral mining industries and with coal mining, summary reference tabulations are included at the end of both the operator and the contractor sections of this report.

  4. Injury experience in coal mining, 1989

    SciTech Connect (OSTI)

    Not Available

    1990-01-01

    This Mine and Safety and Health Administration (MSHA) informational report reviews in detail the occupational injury and illness experience of coal mining in the United States for 1989. Data reported by operators of mining establishments concerning work injuries are summarized by work location, accident classification, part of body injured, nature of injury, occupation, and anthracite or bituminous coal. Related information on employment, worktime, and operating activity also is presented. Data reported by independent contractors performing certain work at mining locations are depicted separately in this report. For ease of comparison between coal mining and the metal and nonmetal mineral mining industries, summary reference tabulations are included at the end of both the operator and the contractor sections of this report. 3 figs., 46 tabs.

  5. Injury experience in stone mining, 1986

    SciTech Connect (OSTI)

    Not Available

    1987-01-01

    This Mine Safety and Health Administration (MSHA) informational report reviews in detail the occupational injury and illness experience of stone mining in the United States for 1986. Data reported by operators of mining establishments concerning work injuries are summarized by work location, accident classification, part of body injured, nature of injury, occupation, and principal type of mineral. Related information on employment, worktime, and operating activity also is presented. Data reported by independent contractors performing certain work at mining locations are depicted separately in this report. For ease of comparison with other metal and nonmetallic mineral mining industries and with coal mining, summary reference tabulations are included at the end of both the operator and the contractor sections of this report. 3 figs., 46 tabs.

  6. Injury experience in metallic mineral mining, 1986

    SciTech Connect (OSTI)

    Not Available

    1987-01-01

    This Mine Safety and Health Administration (MSHA) informational report reviews in detail the occupational injury and illness experience of metallic mineral mining in the United States for 1986. Data reported by operators of mining establishments concerning work injuries are summarized by work location, accident classification, part of body injured, natured of injury, occupation, and principal type of mineral. Related information on employment, worktime, and operating activity also is presented. Data reported by independent contractors performing certain work at mining locations are depicted separately in this report. For ease of comparison with other metal and nonmetallic mineral mining industries and with coal mining, summary reference tabulations are included at the end of both the operator and the contractor sections of this report. 3 figs., 46 tabs.

  7. Injury experience in metallic mineral mining, 1989

    SciTech Connect (OSTI)

    Not Available

    1990-01-01

    This Mine Safety and Health Administration (MSHA) informational report reviews in detail the occupational injury and illness experience of metallic mineral mining in the the United States for 1989. Data reported by operators of mining establishments concerning work injuries are summarized by work location, accident classification, part of body injured, nature of injury, occupation, and principal type of mineral. Related information on employment, worktime, and operating activity also is presented. Data reported by independent contractors performing certain work at mining locations are depicted separately in this report. For ease of comparison with other metal and nonmetallic mineral mining industries and with coal mining, summary reference tabulations are included at the end of both the operator and the contractor sections of this report. 3 figs., 46 tabs.

  8. Injury experience in stone mining, 1989

    SciTech Connect (OSTI)

    Not Available

    1990-01-01

    This Mine Safety and Health Administration (MSHA) informational report reviews in detail occupational injury and illness experience of stone mining in the United States for 1989. Data reported by operators of mining establishments concerning work injuries are summarized by work location, accident classification, part of body injured, nature of injury, occupation, and principal type of mineral. Related information on employment, worktime, and operating activity also is presented. Data reported by independent contractors performing certain work at mining locations are depicted separately in this report. For ease of comparison with other metal and nonmetallic mineral mining industries and with coal mining, summary reference tabulations are included at the end of both the operator and the contractor sections of this report. 3 figs., 46 tabs.

  9. ITP Mining: Mining Industry of the Future Mineral Processing Technology Roadmap

    Office of Energy Efficiency and Renewable Energy (EERE)

    In June 1998, the Chairman of the National Mining Association and the Secretary of energy entered into a Compact to pursue a collaborative technology research partnership, the Mining Industry of the Future.

  10. ORS 517.705 Exploration Permit Regulations for Mining and Mining...

    Open Energy Info (EERE)

    .705 Exploration Permit Regulations for Mining and Mining Claims Jump to: navigation, search OpenEI Reference LibraryAdd to library Legal Document- StatuteStatute: ORS 517.705...

  11. Cost analysis of aerial photographic and satellite imagery for monitoring mined land reclamation

    SciTech Connect (OSTI)

    Green, J.E.; Buschur, J.P.

    1980-12-01

    Five sections of the Surface Mining Control and Reclamation Act of 1977 require information that is easily and efficiently obtainable by aerial photographic and remote sensing methods. Most states in which mining is important and to which the Act most specifically applies, maintain or have available to them aerial photographic or remotely sensed information of the type required. This information could be used to meet the requirements of the Act which call for monitoring reclamation progress, identifying land areas unsuitable for mining and determining land use prior to mining to name a few examples. At the regional scale, LANDSAT imagery of a scale of 1:250,000 provides a good combination of aerial coverage and detail for regional problem solving. At the local scale, such coverage as is provided by the Agricultural Stabilization and Conservation Service through their aerial observation method of compliance technique can supply local, detailed information to meet site specific needs.

  12. Bauma returns with a large mining component

    SciTech Connect (OSTI)

    Casteel, K.

    2007-04-15

    The world's largest construction trade fair is also a major mining show covering equipment from excavation to product load out. This comprehensive preview of the bauma 2007 exposition (23-29 April 2007) describes construction equipment which will be displayed, concentrating on mining equipment. It includes drilling equipment; earthmoving, excavation and grading machinery; loading and hauling machines; underground mining equipment; crushing and screening equipment; conveyors; and pumps. 25 photos.

  13. Injury experience in coal mining, 1984

    SciTech Connect (OSTI)

    Not Available

    1986-01-01

    This report reviews in detail the occupational injury and illness experience of coal mining in the United States for 1984. Data reported by operators of mining establishments concerning work injuries are summarized by work location, accident classification, part of body injured, nature of injury, occupation, and anthracite or bituminous coal. Related information on employment, worktime, and operating activity also is presented. Data reported by independent contractors performing certain work at mining locations are depicted separately in this report.

  14. Rapid extinguishing of sponcom fires in underground mines

    SciTech Connect (OSTI)

    Kajdasz, Z.; Zieba, G.

    1999-07-01

    The main purpose presented in this paper is to present active and passive methods to fight a sponcom fire. The active method uses an inert gas generator called the GAG while the passive method is through the use of ventilation software. In most sponcom situations a combination of these two methods results in rapid extinguishing of the overheated areas. The presented software allows for accurate and real time analysis of the ventilation network. Application of the GAG has been proven on many occasions as an effective means of producing large volumes of inert mine atmospheres with which to fight fires.

  15. Injury experience in coal mining, 1985

    SciTech Connect (OSTI)

    Not Available

    1987-01-01

    This Mine Safety and Health Administration (MSHA) informational report reviews in details the occupational injury and illness experience of coal mining in the United States for 1985. Data reported by operators of mining establishments concerning work injuries are summarized by work location, accident classification, part of body injured, nature of injury, occupation, and anthracite or bituminous coal. Related information on employment, worktime, and operating activity also is presented. Data reported by independent contractors performing certain work at mining locations are depicted separately in this report. For ease of comparison between coal mining and the metal and nonmetal mineral mining industries, summary reference tabulations are included at the end of both the operator and the contractor sections of this report. Data used in compiling this report were reported by operators of coal mines and preparation plants on a mandatory basis as required under the Federal Mine Safety and Health Act of 1977, Public Law 91-173 as amended by Public Law 95-164. Since January 1, 1978, operators of mines or preparation plants or both which are subject to the act have been required under 30 CFR, Part 50 to submit reports of injuries, occupational illnesses, and related data. 3 figs., 46 tabs.

  16. Injury experience in coal mining, 1991

    SciTech Connect (OSTI)

    Not Available

    1991-12-31

    This Mine Safety and Health Administration (MSHA) informational report reviews in detail the occupational injury and illness experience of coal mining in the United States for 1991. Data reported by operators of mining establishments concerning work injuries are summarized by work location, accident classification, part of body injured, nature of injury, occupation, and anthracite or bituminous coal. Related information on employment, worktime, and operating activity also is presented. Data reported by independent contractors performing certain work at mining locations are depicted separately in this report. For ease of comparison between coal mining and the metal and nonmetal mineral mining industries, summary reference tabulations are included at the end of both the operator and the contractor sections of this report. Data used in compiling this report were reported by operators of coal mines and preparation plants on a mandatory basis as required under the Federal Mine Safety and Health Act of 1977, Public Law 91-173,as amended by Public Law 95-164. Since January 1, 1978, operators of mines or preparation plants or both which are subject to the Act have been required under 30 CFR, Part 50, to submit reports of injuries, occupational illnesses, and related data.

  17. Injury experience in metallic mineral mining, 1985

    SciTech Connect (OSTI)

    Not Available

    1987-01-01

    This Mine Safety and Health Administration (MSHA) informational report reviews in detail the occupational injury and illness experience of metallic mineral mining in the United States for 1985. Data reported by operators of mining establishments concerning work injuries are summarized by work location, accident classification, part of body injured, nature of injury, occupation, and principal type of mineral. Related information on employment, worktime, and operating activity also is presented. Data reported by independent contractors performing certain work at mining locations are depicted separately in this report. For ease of comparison with other metal and nonmetallic mineral mining industries and with coal mining, summary reference tabulations are included at the end of both the operator and the contractor sections of this report. Data used in compiling this report were reported by operators of metallic mineral mines and preparation plants on a mandatory basis as required under the Federal Mine Safety and Health Act of 1977, Public Law 91-173 as amended by Law 95-164. Since January 1, 1978, operators of mines or preparation plants or both which are subject to the Act have been required under 30 CFR, Part 50, to submit reports of injuries, occupational illnesses, and related data. 3 figs., 46 tabs.

  18. Injury experience in coal mining, 1980

    SciTech Connect (OSTI)

    Not Available

    1981-01-01

    This Mine Safety and Health Administration (MSHA) informational report reviews in detail the occupational injury and illness experience of coal mining in the United States for 1980. Data reported by operators of mining establishments concerning work injuries are summarized by work location, accident classification, part of body injuried, nature of injury, occupation, and bituminous or anthracite coal. Correlative information on employment, worktime, and operating activity also is presented. For ease of correlation between coal mining and the metal and nonmetal mineral mining industries, summary reference tabulations are included at the end of the report. Data used in compiling this report were reported by operators of coal mines and preparation plants on a mandatory basis as required under the Federal Mine Safety and Health Act of 1977, Public Law 91-173 as amended by Public Law 95-164. Since January 1, 1978, operators of mines or preparation plants or both which are subject to the Act have been required under 30 CFR, Part 50 to submit reports of injuries, occupational illnesses, and related data. Only data reported by operators are utilized in this report. The statistical measures for injury experience adopted by MSHA in 1978 compare closely with the measures used in the Office of Occupational Safety and Health Statistics, Bureau of Labor Statistics, US Department of Labor. Therefore, beginning with 1978 data the mining industry can be compared on a standard basis with other United States industries.

  19. WIPP Mine Rescue Team Wins Colorado Competition

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Colorado Competition CARLSBAD, N.M., July 11, 2001 - The Silver Mine Rescue Team from the U.S. Department of Energy's (DOE) Waste Isolation Pilot Plant (WIPP) placed first in the recent Western Regional Mine Rescue Competition. It was the first victory by a WIPP team in this competition in five years. The Colorado State Mine Inspector's Office, in conjunction with the Colorado School of Mines, hosted the Western Regional, June 12-14 in Golden, Colorado. The WIPP Silver Team defeated seven teams,

  20. Mining Industry Profile | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    These mined minerals include coal, metals such as iron, copper, or zinc, and industrial ... Furthermore, coal accounts for nearly 50% of electric power generated in the United ...

  1. LLNL`s partnership with selected US mines, for CTBT verification: A pictorial and some reflections

    SciTech Connect (OSTI)

    Heuze, F.E.

    1996-01-01

    The verification of an upcoming Comprehensive Test Ban Treaty (CTBT) will involve seismic monitoring and will provide for on-site inspections which may include drilling. Because of the fact that mining operations can send out strong seismic signals, many mining districts in the US and abroad may come under special scrutiny. The seismic signals can be generated by the use of large quantities of conventional explosives, by the collapse of underground workings, or by sudden energy release in the ground such as in rock bursts and coal bumps. These mining activities may be the cause of false alarms, but may also offer opportunities for evasive nuclear testing. So in preparing for future verification of a CTBT it becomes important to address the mining-related questions. For the United States, these are questions to be answered with respect to foreign mines. But there is a good amount of commonality in mining methods worldwide. Studies conducted at US mine sites can provide good analogs of activities that may be carried out for overseas CTBT verification, save for the expected logistical impediments.

  2. INTEGRATED ROBOT-HUMAN CONTROL IN MINING OPERATIONS

    SciTech Connect (OSTI)

    George Danko

    2005-04-01

    This report contains a detailed description of the work conducted in the first year of the project on Integrated Robot-Human Control in Mining Operations at University of Nevada, Reno. This project combines human operator control with robotic control concepts to create a hybrid control architecture, in which the strengths of each control method are combined to increase machine efficiency and reduce operator fatigue. The kinematics reconfiguration type differential control of the excavator implemented with a variety of ''software machine kinematics'' is the key feature of the project. This software re-configured excavator is more desirable to execute a given digging task. The human operator retains the master control of the main motion parameters, while the computer coordinates the repetitive movement patterns of the machine links. These repetitive movements may be selected from a pre-defined family of trajectories with different transformations. The operator can make adjustments to this pattern in real time, as needed, to accommodate rapidly-changing environmental conditions. A Bobcat{reg_sign} 435 excavator was retrofitted with electro-hydraulic control valve elements. The modular electronic control was tested and the basic valve characteristics were measured for each valve at the Robotics Laboratory at UNR. Position sensors were added to the individual joint control actuators, and the sensors were calibrated. An electronic central control system consisting of a portable computer, converters and electronic driver components was interfaced to the electro-hydraulic valves and position sensors. The machine is operational with or without the computer control system depending on whether the computer interface is on or off. In preparation for emulated mining tasks tests, typical, repetitive tool trajectories during surface mining operations were recorded at the Newmont Mining Corporation's ''Lone Tree'' mine in Nevada.

  3. Self advancing mine roof supports

    SciTech Connect (OSTI)

    Seddon, J.; Jones, F.

    1985-03-19

    A self-advancing mine-roof-support for use in or aligned with a main roadway or gate has a floor-engaging part and a roof engaging part spaced apart by extensible load-bearing prop or jack means, and engagement means for a face-conveyor and a transversely acting transfer conveyor whereby their relative positions are constrained to facilitate discharge of mineral from one conveyor to the other. The engagement means for the face conveyor comprises sliding anchor beams that assure maintenance of the relative attitudes of the support and the face conveyor and the transfer conveyor is held fore and aft of the support.

  4. Inner Mongolia Fengwei New Energy Mining Co Ltd | Open Energy...

    Open Energy Info (EERE)

    Fengwei New Energy Mining Co Ltd Jump to: navigation, search Name: Inner Mongolia Fengwei New Energy Mining Co Ltd Place: Inner Mongolia Autonomous Region, China Product:...

  5. Colorado School of Mines - Colorado Energy Research Institute...

    Open Energy Info (EERE)

    Mines - Colorado Energy Research Institute Jump to: navigation, search Name: Colorado School of Mines - Colorado Energy Research Institute Address: 1500 Illinois Street Place:...

  6. Montana Bureau of Mines and Geology Website | Open Energy Information

    Open Energy Info (EERE)

    Web Site: Montana Bureau of Mines and Geology Website Abstract Provides access to digital information on Montana's geology. Author Montana Bureau of Mines and Geology...

  7. Zhangjiajie Guinie Mining Co Ltd | Open Energy Information

    Open Energy Info (EERE)

    Zhangjiajie Guinie Mining Co Ltd Jump to: navigation, search Name: Zhangjiajie Guinie Mining Co Ltd Place: Zhangjiajie, Hunan Province, China Product: Miner, refiner and processor...

  8. Mines Welcomes Middle School Students | Critical Materials Institute

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    of Science and Technology. The students spent the day at Mines to learn about Earth, energy, the environment, critical materials and mining. The students enjoyed a chemistry show ...

  9. Injury experience in stone mining, 1987

    SciTech Connect (OSTI)

    Not Available

    1988-01-01

    This Mine Safety and Health Administration (MSHA) informational report reviews in detail the occupational injury and illness experience of stone mining in the United States for 1987. Data reported by operators of mining establishments concerning work injuries are summarized by work location, accident classification, part of body injured, nature of injury, occupation, and principal type of mineral. Related information on employment, worktime, and operating activity also is presented. Data reported by independent contractors performing certain work at mining locations are depicted separately in this report. For ease of comparison with other metal and nonmetallic mineral industries and with coal mining, summary reference tabulations are included at the end of both the operator and the contractor sections of this report. 3 figs., 46 tabs.

  10. Characterization of seven United States coal regions. The development of optimal terrace pit coal mining systems

    SciTech Connect (OSTI)

    Wimer, R.L.; Adams, M.A.; Jurich, D.M.

    1981-02-01

    This report characterizes seven United State coal regions in the Northern Great Plains, Rocky Mountain, Interior, and Gulf Coast coal provinces. Descriptions include those of the Fort Union, Powder River, Green River, Four Corners, Lower Missouri, Illinois Basin, and Texas Gulf coal resource regions. The resource characterizations describe geologic, geographic, hydrologic, environmental and climatological conditions of each region, coal ranks and qualities, extent of reserves, reclamation requirements, and current mining activities. The report was compiled as a basis for the development of hypothetical coal mining situations for comparison of conventional and terrace pit surface mining methods, under contract to the Department of Energy, Contract No. DE-AC01-79ET10023, entitled The Development of Optimal Terrace Pit Coal Mining Systems.