Use of surface joint and photolinear data for predicting subsurface coal cleat orientation. Report of investigations
Technical Report
·
OSTI ID:7341963
Coalbeds exhibit a directional permeability, with the maximum permeability oriented parallel to the dominant fracture, the face cleat. Thus, the most efficient pattern of vertical degasification holes for a coalbed is dependent upon cleat orientation. Surface joints, infrared photolinears and Ronchi grating photolinears were investigated as potential estimators of subsurface cleat orientation in areas of virgin coal. Cleat orientations were measured in 18 mines in the Pittsburgh coal in southwestern Pennsylvania and northern West Virginia to be used as a standard against which prediction techniques would be evaluated. (GRA)
- Research Organization:
- Bureau of Mines, Pittsburgh, Pa. (USA). Pittsburgh Mining and Safety Research Center
- OSTI ID:
- 7341963
- Report Number(s):
- PB-252319; BM-RI-8120
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
011000 -- Coal
Lignite
& Peat-- Reserves
Geology
& Exploration
012000* -- Coal
Lignite
& Peat-- Mining
CENTRAL REGION
COAL DEPOSITS
COAL GAS
COAL MINING
DEGASSING
FLUIDS
GASES
GEOLOGIC DEPOSITS
GEOLOGIC STRUCTURES
MINING
NORTH AMERICA
PENNSYLVANIA
PERMEABILITY
RECOVERY
RESOURCES
STANDARDS
USA
WEST VIRGINIA
011000 -- Coal
Lignite
& Peat-- Reserves
Geology
& Exploration
012000* -- Coal
Lignite
& Peat-- Mining
CENTRAL REGION
COAL DEPOSITS
COAL GAS
COAL MINING
DEGASSING
FLUIDS
GASES
GEOLOGIC DEPOSITS
GEOLOGIC STRUCTURES
MINING
NORTH AMERICA
PENNSYLVANIA
PERMEABILITY
RECOVERY
RESOURCES
STANDARDS
USA
WEST VIRGINIA