Geologic factors in coal mines roof stability: a progress report

Journal Article · Sun Jan 01 04:00:00 EST 1984 · Inf. Circ. - U.S., Bur. Mines; (United States)

OSTI ID:6178165

Moebs, N N; Stateham, R M

This report summarizes 10 selected United States Bureau of Mines research contract reports produced from 1970 to 1980 that consist largely of geologic studies of coal-mine roof-support problems. The reports focus on the Appalachian and Illinois coal-mining regions. In the Appalachian region two geologic structures, roof rolls and slickensides, predominate as features that directly contribute to roof falls. Studies of these and other structures are reviewed, and improved methods of utilizing drill core and core logs to prepare hazard maps are presented. Among the reports described are several on the weakening effects of moisture on shale roof, as determined from both laboratory and underground measurements, and an assessment of air tempering as a humidity-control method. Also summarized are findings concerning the time lapse between roof exposure and permanent support installation as a factor in the effectiveness of roof bolting.

• OSTI ID: 6178165
• Journal Information: Inf. Circ. - U.S., Bur. Mines; (United States), Journal Name: Inf. Circ. - U.S., Bur. Mines; (United States) Vol. 8976; ISSN XIMIA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
012000* -- Coal
Lignite
& Peat-- Mining
APPALACHIA
COAL MINES
DRILL CORES
EQUIPMENT
EVALUATION
FAILURES
FEDERAL REGION V
FORECASTING
GEOLOGIC STRUCTURES
ILLINOIS
MECHANICAL STRUCTURES
MINES
MINING
MINING EQUIPMENT
MOISTURE
NORTH AMERICA
ROCK BURSTS
ROOF BOLTS
ROOFS
STABILITY
STRATA CONTROL
SUPPORTS
TIME DEPENDENCE
UNDERGROUND FACILITIES
UNDERGROUND MINING
USA