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Terms: 'stress reduction'

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8	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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