Effect of Partial Water Flooding on the Stress–Strain State of the Crown Pillar in the Aikhal Mine
M. V. KURLENYA, V. D. BARYSHNIKOV, L. N. GAKHOVA
N.A. Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091 Russia
Keywords: stresses, strains, rock mass, confining bed, open pit mine
Abstract
Based on numerical modeling of stress–strain state of rocks and the in situ deformation monitoring of rocks mass surrounding underground excavations, the authors determine limit criteria of geomechanical stability of mine structural elements in terms of the Aikhal Mine where mining has been transferred under the worked-out open pit bottom. Using the determined criteria, the stress–strain state and subsidence of the crown pillar are assessed, considering current stage of the water table in the open pit. The article gives predictive estimate of the change in the stress–strain state and subsidence of the crown pillar upon the water level raising.
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