Geomechanical Behavior of Undermined Rock Mass in Blind Orebody Mining in Tashtagol Field
A. A. Eremenko1, A. G. Gavrilov2, V. A. Shtirts3, V. S. Pisarev4
1Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
2Mine Assets-Division, EVRAZ ZSMK, Novokuznetsk, Russia
3Mine Assets-Division, EVRAZ ZSMK, Sheregesh, Russia
4Siberian State University of Geosystems and Technologies, Novosibirsk, Russia
Keywords: Rock pillar, mined-out space, ore body, gravimetry, mining system, ore, rock, bumps, mineral deposit
Abstract
The behavior of a pillar is examined in the course of mining of a blind ore body in the Southeast site of Tashtagol field. The geomechanics and geodynamics of the field is analyzed. The article gives calculations of stresses and inelastic strains, as well as the possible failure zones nearby the mined-out space during actual mining in the Southeast site and in the period of ground surface sink. The authors present the geophysical survey data on the thickness of the crown pillar between the mined-out area roof and ground surface. The area and parameters of the sink are determined from gravimetric measurements and aerial photography.
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