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Cutter Roof Failure: Six Case Studies in the Northern Appalachian Coal Basin.

Authors
Bauer-ER
Source
MISSING :18 pages
Link
NIOSHTIC No.
10008138
Abstract
This U.S. Bureau of Mines study was conducted to gain a basis for recommending methods to predict and prevent the occurrence of cutter roof failure, a common ground control problem in mines of the Northern Appalachian Coal Basin. This was accomplished by determining the geologic and engineering factors responsible for cutter development at six mines affected by cutter roof failure. Three distinct factors were found to be initiators of cutter roof failure: (1) high horizontal roof stress, (2) surface topographic variations, and (3) geologic anomalies. Effective control of cutter roof was obtained through improved bolting techniques, entry and mine reorientation, and entry and pillar size modifications, but only when selected based on the actual cause of failure.
Publication Date
19900101
Document Type
IH; Information Circular;
Fiscal Year
1990
NTIS Accession No.
NTIS Price
Identifying No.
IC 9266
NIOSH Division
PRC;
Source Name
MISSING
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