STRUCTURAL GEOLOGY AND BENCH CONDITIONS IN THE GRANITE PIT

World Mining Congress

*Samuel Nunoo1 and Dwayne D. Tannant1

Ben Pierce2

1 School of Engineering, University of British Columbia, Kelowna, B.C., Canada V1V 1V7

(*Corresponding author: samuel.nunoo@ubc.ca)

2 Gibraltar Mines Ltd., McLeese Lake, B.C., Canada

Gibraltar Mine is an open pit copper-molybdenum mine in central British Columbia. The stability and potential failure modes of pit walls in the Granite Pit are controlled by the orientations of joints and faults. The structural geology also has an impact on as-mined bench geometries. Geotechnical mapping and surveying were conducted using stereo photographs and photogrammetry software. Detailed digital terrain models were constructed to determine the pit wall geometry and the locations and orientations of larger structural features. The pit wall geometry is compared to conventional survey results and the mapped structures are compared to results from a nearby geotechnical borehole.
Keywords: Pits; Faults; Fault; Granite; Granites; Rocks; Rock; Mines; Mine; Mines;
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