SMALL TULUKUI DEPOSIT IN SOUTHEASTERN TRANSBAIKALIA: GEOMECHANICS AND GEODYNAMICS
I.Yu Rasskazov1, V. A. Petrov2, Yu. V. Fedotova1, P. A. Anikin1, M. I. Potapchik1, V. I. Usikov1
1Institute of Mining, Far East Branch, Russian Academy of Sciences, Khabarovsk, Russia
2Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry, Russian Academy of Sciences, Moscow, Russia
Keywords: Geodynamic zoning, stress-strain behavior, physical and mechanical properties, geomechanical control, rockburst hazard
Abstract
The article presents the integrated research into geomechanics and geodynamics of Small Tulukui uranium ore field in southeastern Transbaikalia. The studies into tectonic structure and the terrain morphometry in the area of the Steltsov ore field reveals the modern geodynamics features and their correlation with the stress-strain behavior of rock mass. The stress field parameters and the physical/mechanical properties of rocks point at potential of dynamic fracture in the edge area of the deposit. The numerical stress-strain modeling and in-situ observation data prove the tendency of rock mass to rockbursting, and the bottom levels of the deposit (at the depth of 500 m and downward) are assessed as rockburst-hazardous. A package of measures aimed to prevent rock bursts and to reduce geodynamic risk is developed for the mining safety.
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