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Evaluating Bump Control Techniques Through Convergence Monitoring.

Authors
Campoli-AA
Source
Coal Mining 1987 Jul; 24(7):42-46
Link
NIOSHTIC No.
10005737
Abstract
This paper describes bump control techniques employed at the Olga Mine in McCowell County, West Virginia. Stress reduction techniques such as shot firing and auger drilling were evaluated using convergence monitoring, and roof and floor extensometer data confirmed that convergence is generally caused by a coal pillar yielding under stress rather than by separations in the roof or the heaving of the floor.
Publication Date
19870701
Document Type
OP;
Fiscal Year
1987
NTIS Accession No.
NTIS Price
Identifying No.
OP 90-87
Issue of Publication
7
NIOSH Division
PRC;
Source Name
Coal Mining, V. 24, No. 7, July 1987, PP. 42-46
State
WV;
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