INFLUENCE OF DRILLING-AND-BLASTING OPERATIONS ON THE STABILITY OF MINE WORKINGS AND INTERSECTIONS
E. A. Khristolyubov1, E. E. Uzun1, A. A. Eremenko2,3, I. N. Mokrousov2
1Gorno-Shorsky branch of Evraz ZSMK, Sheregesh, Russia
2Chinakal Institute of Mining, Siberian Branch Russian Academy of Sciences, Novosibirsk, Russia
3T. F. Gorbachev Kuzbass State Technical University, Kemerovo, Russia
Keywords: Взрывные работы, скважина, заколообразование, выработки, сейсмическая энергия, анализ, профилактические мероприятия, Blasting operations, borehole, flaw formation, mine workings, seismic energy, analysis, preventive measures
Abstract
The influence exerted by blasting on the geomechanical state of the rock mass in mining blocks, creating compensation chambers and undercuttings is analyzed. The effect of the seismic energy of explosions on the number of shocks in mine workings and their intersections is determined. It is shown that the most of cavings occur during explosions with the energies of 106 and 107 J at the distances of 40-300 m or more, when the explosive weight is 300 t, their volumes are 15 m3.
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