ABSTRACT

ABSTRACT: Mining at Mine Gaspe is carried out via longitudinal blasthole open stoping with delayed backfill. Increasing seismic activity was observed as mining progressed into the second panel. An integrated study of mine induced seismicity occurring over roughly eight months following system installation, seismic velocity, stress and geomechanical data, indicated that the majority of microseismic activity was related to the development of a large stress arch over the mined out panels. During extraction of the 400 panel a back failure in previously cable bolt supported ground occurred in the 400-10 stope. Analysis suggests a significant mine induced stress decrease occurred with extraction of the 400-10 stope. It is believed that this resulted in the observed back failure. The overall integrated analysis was critical to ultimately understanding the interaction of mine induced stresses, mine structure and cable bolt capacity. This technique shows promise as a tool for enhanced design of underground mine openings.

Keywords:
Upstream Oil & Gas, ore zone, metals & mining, Gaspe, orientation, extraction, Reservoir Characterization, cable bolt failure, back failure, cable
Subjects:
Reservoir Characterization, Seismic processing and interpretation
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1994. A.A. Balkema - Permission to Distribute - American Rock Mechanics Association
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