DETERMINATION OF ROCKBURST-HAZARDOUS ZONES FROM THE EDGE PARTS OF THE STOPING AREA IN SUBLEVEL MINING SYSTEM UNDER CONDITIONS OF THE TASHTAGOL AND SHEREGESH DEPOSITS
A. I. Konurin1, V. A. Shtirts2, E. A. Khristolyubov3
1Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
2Mine Tashtagol, JSC “EVRAZ ZSMK”, Tashtagol, Russia
3Mine Sheregesh, JSC “EVRAZ ZSMK”, Sheregesh, Russia
Keywords: Deposits, ore, technologies, mining operations, stress state, hazardous zones, dynamic phenomena, rockburst, mining safety
Abstract
The stress-strain state of rocks and rockburst-hazard degree at the Tashtagol and Sheregesh deposits of “EVRAZ ZSMK” were analyzed during large-scale and technological blasts. The geodynamic state of the rock mass in the maximum bearing pressure zone is estimated. The zones of the distribution of shocks with different seismic energy in the rock mass during the preparation and mining of blocks are determined. The influence of tectonic disturbances ahead of the stoping front on the geomechanical condition of rocks in the mine field is determined. The developed methodology for calculating and constructing zones of increased rock pressure allows determining the location of hazardous zones depending on thickness of ore bodies, main horizontal stresses, ultimate compressive strength of rocks, etc., when mining several bodies simultaneously in rockburst-hazardous deposits.
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