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Geologic hazards and roof stability in coal mines.

Authors
Molinda-GM
Source
NIOSH 2003 Oct; :1-33
NIOSHTIC No.
20023684
Abstract
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.
Keywords
Ground-control; Ground-stability; Geology; Coal-mining; Underground-mining; Coal-miners; Hazards
Contact
NIOSH Pittsburgh Research Laboratory, P.O. Box 18070, Pittsburgh, PA 15236
Publication Date
20031001
Document Type
Numbered Publication; Information Circular
Fiscal Year
2004
NTIS Accession No.
PB2004-101217
NTIS Price
A04
Identifying No.
(NIOSH) 2003-152; IC-9466
NIOSH Division
PRL
Source Name
National Institute for Occupational Safety and Health
State
PA; IL; WV; OH; MD; KY; VA
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