Longwall gate road roof instability and methods of control in the lower kittanning coalbed of central Pennsylvania. Information circular/1992

Technical Report · Wed Jan 01 04:00:00 EST 1992

OSTI ID:6940510

Bauer, E R; Listak, J M; Krupa, E D

The report presents the results of a cooperative study between BethEnergy Inc., Ebensburg, PA., a central Pennsylvania coal mining company, and the U.S. Bureau of Mines, to investigate longwall development entry roof instability. In-mine mapping of geologic and deformational features was conducted to reveal the major ground control problems encountered during gate road development. Underground measurements were made to delineate the in situ stress field and its effect on cutter roof failure. In addition, mining-induced pillar load monitoring was used to indicate development loading on variously dimensioned gate road pillars and to determine if pillar yielding occurred. Finally, visual observations of a variety of roof control methods determined the most effective support elements for controlling cutter roof failure.

• Research Organization: Bureau of Mines, Pittsburgh, PA (United States). Pittsburgh Research Center
• OSTI ID: 6940510
• Report Number(s): PB-93-132140/XAB; BUMINES-IC--9331
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
016000* -- Coal
Lignite
& Peat-- Health & Safety
COAL MINING
CONTROL
DEVELOPED COUNTRIES
ENGINEERING
EQUIPMENT
INFORMATION
INSTABILITY
LEVELS
LOADING
LONGWALL MINING
MAPPING
MATERIALS HANDLING
MINE HAULAGE
MINES
MINING
MINING ENGINEERING
MINING EQUIPMENT
MONITORING
NORTH AMERICA
PENNSYLVANIA
ROOF BOLTS
ROOFS
STABILITY
UNDERGROUND
UNDERGROUND FACILITIES
UNDERGROUND MINING
USA