Multislice mining for thick Western coal seams. Information Circular/1990
Technical Report
·
OSTI ID:5992712
Multislice mining methods were analyzed by the U.S. Bureau of Mines to determine their application to Western U.S. thick coal seams; ground control, geology and costs were considered. Multislice mining is used in widely varying seam conditions worldwide, including flat seams too thick to mine in a single pass, pitching thick seams, and seams containing a rock parting. Longwall multislice methods predominate, but room-and-pillar variants also exist. The initial use of the method in western seams is planned at a deep Colorado mine, where a rock parting will be used to separate two slices mined by longwall. Ground control and spontaneous combustion are major hazards associated with multislice mining. A well-consolidated upper slice gob can reduce ground control problems and provide a seal against spontaneous combustion. Geologic analysis indicates that the consolidation of the gob depends on the composition of the upper slice roof, the presence of water, and sufficient overburden pressure. A geologically competent intermediate rock parting can also reduce ground control problems and seal against spontaneous combustion.
- Research Organization:
- Bureau of Mines, Denver, CO (USA). Denver Research Center
- OSTI ID:
- 5992712
- Report Number(s):
- PB-91-160929/XAB; BUMINES-IC--9239
- Country of Publication:
- United States
- Language:
- English
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01 COAL, LIGNITE, AND PEAT
012030* -- Coal
Lignite
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CHEMICAL REACTIONS
COAL DEPOSITS
COAL MINING
COAL SEAMS
COLORADO
COMBUSTION
CONTROL
DIMENSIONS
ENGINEERING
FEDERAL REGION VIII
GEOLOGIC DEPOSITS
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NATIONAL ORGANIZATIONS
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OXIDATION
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ROOM AND PILLAR MINING
SLICE MINING
SPONTANEOUS COMBUSTION
STRATA CONTROL
TECHNOLOGY ASSESSMENT
THERMOCHEMICAL PROCESSES
THICKNESS
UNDERGROUND MINING
US BUREAU OF MINES
US DOI
US ORGANIZATIONS
USA
012030* -- Coal
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& Peat-- Underground Mining-- (1987-)
CHEMICAL REACTIONS
COAL DEPOSITS
COAL MINING
COAL SEAMS
COLORADO
COMBUSTION
CONTROL
DIMENSIONS
ENGINEERING
FEDERAL REGION VIII
GEOLOGIC DEPOSITS
GEOLOGY
HAZARDS
HYDROLOGY
LONGWALL MINING
MECHANICS
MINERAL RESOURCES
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MINING ENGINEERING
NATIONAL ORGANIZATIONS
NORTH AMERICA
OVERBURDEN
OXIDATION
PROCESS CONTROL
RESERVOIR PRESSURE
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ROCK MECHANICS
ROOFS
ROOM AND PILLAR MINING
SLICE MINING
SPONTANEOUS COMBUSTION
STRATA CONTROL
TECHNOLOGY ASSESSMENT
THERMOCHEMICAL PROCESSES
THICKNESS
UNDERGROUND MINING
US BUREAU OF MINES
US DOI
US ORGANIZATIONS
USA