Ruofan Wang
École Polytechnique de Montréal
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Abstract Pillar recovery requires stable backfill upon side exposure in open stoping mining methods. Until now, the solutions used to estimate the required strength of side-exposed backfill are mainly based on a wedge model where the effect of rock-wall closure was neglected. In this paper, the influence of mine depth and adjacent extraction on the stability of side-exposed backfill is analyzed through numerical modeling with FLAC 3D. The failure mechanism and cohesion at failure (cf) of backfil...
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