Geologic hazards and roof stability in coal mines.
NIOSH 2003 Oct; :1-33
The U.S. underground coal miner faces a continuing hazard from the fall of roof. At the root of many injuries and fatalities are weak or defective roof strata. Throughout mining history, millions of miles of entry have provided exposure of every conceivable geologic roof hazard. This report describes the geologic origin, association, and potential danger from the most common hazards. Discussions of weak rock include drawrock, rider coals, head coal, stackrock, and stream valley effects. Discontinuities, or roof defects, are described including, clay veins, slickensides, joints, and paleochannels. A number of examples from U.S. coalfields are used to document geologic structure and associated hazards. Roof fall analysis is a methodology used by NIOSH for hazard recognition and prevention; its application and benefit to the industry are discussed.
Ground-control; Ground-stability; Geology; Coal-mining; Underground-mining; Coal-miners; Hazards
NIOSH Pittsburgh Research Laboratory, P.O. Box 18070, Pittsburgh, PA 15236
Numbered Publication; Information Circular
NTIS Accession No.
(NIOSH) 2003-152; IC-9466
National Institute for Occupational Safety and Health
PA; IL; WV; OH; MD; KY; VA