W.F. Bawden 1 , J.D. Tod 2 , J. McMullan 3 , and J. Chew 3
1 Lassonde Mineral Engineering Program, U. of Toronto, Canada
2 Mine Design Technologies, Kingston, Canada
3 Newmont Canada Limited Golden Giant Mine, Hemlo, Canada
Abstract
As the Golden Giant Mine has matured, ore has increasingly come from remnant pillars and deep, narrow vein lenses. In the narrow vein area of Upper Block 5, located underthe sandfilled stopes of the David Bell Mine, a shear zone developed at the ore – hangingwall contact. When traditional cable bolt and shotcrete ground support were found to be insufficient to support the failing rock mass, shotcrete pillars were proposed.
The design methodology and installation techniques for the shotcrete pillars are presented. In addition, the results from the instrumentation program, consisting of Contractometers within the pillars and MPBX’s and SMART cable bolts in the back, are discussed.
