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Influence of mining-induced seismicity on potential for rock bursting.

Authors
Swanson-PL
Source
Proceedings: Mechanics and Mitigation of Violent Failure in Coal and Hard-Rock Mines. Washington, DC: U.S. Bureau of Mines, 1995 May; :231-241
Link
NIOSHTIC No.
20024622
Abstract
Relationships between the locations of mining-induced seismic events, local fault structures, and mine geometry were examined by the U.S. Bureau of Mines in the Galena Mine, a deep hard-rock mine in northern Idaho. Stopes in the Galena Mine experiencing rock bursts and other large seismic events were found to fall into two structural regimes: the Silver vein and the N. 48 degrees W. trend. The latter is a steeply dipping plane of seismic activity that is subparallel to major, locally steeply dipping faults that bound blocky structures. The N. 48 degrees W. trend also intersects a shaft that was seriously damaged when fault gouge was expelled into the opening during a 3-month period of high seismic energy release. Models of stress interaction were developed to support the hypothesis that mining-induced deformation was mobilized along a 1.5-km length of the N. 48 degrees W. trend. Specifically, numerical models were used to simulate rupture of seismic events and estimate induced changes in the quasistatic stress field. A Coulomb failure criterion was used with these results to estimate spatial variations in the potential for slip on planes parallel to local faults. Increases in the potential for slip on fault planes subparallel to the N. 48 degrees W. trend were consistent with activation of deformation along the trend's 1.5-km length.
Keywords
Mining-industry; Rock-falls; Rock-bursts; Rock-mechanics; Underground-mining; Control-technology; Geology; Geophysics; Engineering-controls; Ground-control; Ground-stability; Hard-rock-mines; Models
Publication Date
19950501
Document Type
Book or book chapter
Editors
Maleki-H; Wopat-PF; Repsher-RC; Tuchman-RJ
Fiscal Year
1995
NTIS Accession No.
NTIS Price
NIOSH Division
DRC
Source Name
Proceedings: Mechanics and Mitigation of Violent Failure in Coal and Hard-Rock Mines
State
CO; ID
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