Geologic factors in coal mine roof stability--a progress report. Information circular/1984. [Effects of moisture]

Technical Report · Sun Jan 01 04:00:00 EST 1984

OSTI ID:6388370

Moebs, N N; Stateham, R M

This report summarizes 10 selected Bureau of Mines research contract reports produced from 1970 to 1980 which consist largely of geologic studies of coal mine roof support problems. Significant highlights from the contract final reports are discussed and presented in practical terms. The selected reports focus on the Appalachian and Illinois coal mining regions. In the Appalachian coal region, two geologic structures, roof rolls and slickensides, predominate over all structures 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.

• Research Organization: Bureau of Mines, Pittsburgh, PA (USA). Pittsburgh Research Center
• OSTI ID: 6388370
• Report Number(s): PB-84-213735; BM-IC-8976
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
012000* -- Coal
Lignite
& Peat-- Mining
APPALACHIA
COAL MINING
EQUIPMENT
FEDERAL REGION V
GEOLOGIC STRUCTURES
HAZARDS
ILLINOIS
MECHANICAL PROPERTIES
MECHANICAL STRUCTURES
MINE ROADWAYS
MINING
MINING EQUIPMENT
NATIONAL ORGANIZATIONS
NORTH AMERICA
ROCKS
ROOF BOLTS
ROOFS
STABILITY
SUPPORTS
TUNNELS
UNDERGROUND FACILITIES
UNDERGROUND MINING
US BUREAU OF MINES
US DOI
US ORGANIZATIONS
USA