Method of investigations, estimation and classification of roofs in mines in the United States of America for the selection of suitable mechanized support for longwalls. Report No. 3, September 1, 1980-December 31, 1980
A group of Polish engineers visited the US as part of an international cooperation program. They used their instruments to measure the properties of the roof rocks in 4 American underground mines. The data are given in the report with formulae for calculating the rock properties. Suggestions for improved design of the penetrometer used in the measurements are made (mostly those were required because of the hardness of the rocks and to facilitate the taking of the data). (LTN)
- Research Organization:
- Glowny Inst. Gornictwa, Katowice (Poland)
- OSTI ID:
- 6859476
- Report Number(s):
- DOE/TIC-11445
- Resource Relation:
- Other Information: Portions of document are illegible. Work performed under the USDI/CMI Joint Research Project through the Maria Sklodowska-Curie Joint Fund
- Country of Publication:
- United States
- Language:
- English
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+1 more
Related Subjects
01 COAL, LIGNITE, AND PEAT
47 OTHER INSTRUMENTATION
58 GEOSCIENCES
LONGWALL MINING
POWERED SUPPORTS
PENETROMETERS
DESIGN
ROCKS
COMPRESSION STRENGTH
HARDNESS
UNDERGROUND MINING
ROOFS
COAL MINING
EXPERIMENTAL DATA
INTERNATIONAL COOPERATION
MEASURING METHODS
POLAND
USA
COOPERATION
DATA
DEVELOPING COUNTRIES
EASTERN EUROPE
EUROPE
INFORMATION
MEASURING INSTRUMENTS
MECHANICAL PROPERTIES
MECHANICAL STRUCTURES
MINING
NORTH AMERICA
NUMERICAL DATA
SUPPORTS
012000* - Coal
Lignite
& Peat- Mining
440300 - Miscellaneous Instruments- (-1989)
580300 - Mineralogy
Petrology
& Rock Mechanics- (-1989)
47 OTHER INSTRUMENTATION
58 GEOSCIENCES
LONGWALL MINING
POWERED SUPPORTS
PENETROMETERS
DESIGN
ROCKS
COMPRESSION STRENGTH
HARDNESS
UNDERGROUND MINING
ROOFS
COAL MINING
EXPERIMENTAL DATA
INTERNATIONAL COOPERATION
MEASURING METHODS
POLAND
USA
COOPERATION
DATA
DEVELOPING COUNTRIES
EASTERN EUROPE
EUROPE
INFORMATION
MEASURING INSTRUMENTS
MECHANICAL PROPERTIES
MECHANICAL STRUCTURES
MINING
NORTH AMERICA
NUMERICAL DATA
SUPPORTS
012000* - Coal
Lignite
& Peat- Mining
440300 - Miscellaneous Instruments- (-1989)
580300 - Mineralogy
Petrology
& Rock Mechanics- (-1989)