CONSIDERATION OF INHOMOGENEITIES OF OVERBURDEN ROCK PROPERTIES WHEN MINING THE UREGOLSKY DEPOSIT
V. L. Gavrilov, N. A. Nemova, O. M. Usoltseva, P. A. Tsoi
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: Deposit, rocks, rock mass structure, properties, inhomogeneity, variability, mining
Abstract
It is shown that inhomogeneity of the structure and variability of the rock mass properties has a great influence on the mining efficiency of complex deposits, which include the section Uregolsky of the open pit mine Kiyzassky. Field observations were carried out to assess the state of the rock mass on the overburden benches of the working side of the mine, which showed constant differences in their structure and texture along the mining front. The expected differences and variability of the physical and mechanical properties of rocks were confirmed by the laboratory study of rock samples taken from the open-pit face. It is found that natural geological inhomogeneity of the overburden properties significantly affects the sequence and processes of drilling, blasting, excavation, transportation and dumping operations. Fracturing of the rock mass enhances the influence on these processes, general and local geomechanical stability of mine workings.
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