Hanging wall (HW) sloughage is one of the main sources of ore dilution in underground open stope mines. This paper presents the results of a series of numerical analyses performed to investigate HW sloughage potential in open stope underground mines. Hybrid DFN-3DEC models were developed to assess the sloughage zone that can form in a stope hanging wall that consists of a weak and highly fractured rock mass quality. The influence of leaving 1 m and 2 m of ore-skin of higher rock mass quality, unmined along the weak hanging wall zone, on the potential hanging wall sloughage was investigated. The main advantages of hybrid DFN-3DEC models for assessment of hangingwall sloughage potential are their capacity to represent the structural complexity of the rock masses (through the DFN model) and to address the effect of confining stresses on the unravelling process.
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51st U.S. Rock Mechanics/Geomechanics Symposium
June 25–28, 2017
San Francisco, California, USA
Estimating Stope Hangingwall Sloughage Using a Hybrid DFN-DEM Numerical Model
K. Esmaeili
K. Esmaeili
Lassonde Institute of Mining
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Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, San Francisco, California, USA, June 2017.
Paper Number:
ARMA-2017-0531
Published:
June 25 2017
Citation
Urli, V., and K. Esmaeili. "Estimating Stope Hangingwall Sloughage Using a Hybrid DFN-DEM Numerical Model." Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, San Francisco, California, USA, June 2017.
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