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Destressing Test At the Galena Mine, Wallace, Idaho.

Authors
Blake-W
Source
Soc Min Eng Trans AIME 1972 252:294-299
Link
NIOSHTIC No.
10010676
Abstract
As a part of a USBM-Asarco cooperative rock-burst research program, a burst-prone stope pillar at the Galena Mine was successfully destressed. Destressing was accomplished by blasting a single line of long holes in the footwall of the vein. As a result of destressing, the pillar was fractured and softened; hence it yielded, releasing a large amount of stored elastic strain energy nonviolently. In addition, the high stress in the pillar was shifted out around the stope walls and in the sandfill. Both broad- band microseismic monitoring and seismic velocity surveys were used to evaluate the destressing test. The mechanics of destressing were determined by finite element computer model studies of destressing. Results of the field destressing test agreed remarkably well with the predicted results from the computer model.
Publication Date
19720101
Document Type
OP;
Fiscal Year
1972
NTIS Accession No.
NTIS Price
Identifying No.
OP 85-73
Source Name
Soc. Min. Eng., Trans. AIME, V. 252, Sept., 1972, PP. 294-299
State
ID;
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