Support Design for Rockburst-Hazardous Underground Mines in Gornaya Shoria
A. I. Kopytov1, A. A. Eremenko1,2, Yu. N. Shaposhnik2
1Gorbachev Kuzbass State Technical University, Kemerovo, Russia
2Chinakal Institute of Mining, Siberian Branch, Russian Academy of Science, Novosibirsk, Russia
Keywords: крепь, горные выработки, приконтурный массив, устойчивость, трещиноватость, предел прочности, напряженное состояние, категория удароопасности, Mine support, underground excavations, adjacent rock mass, stability, jointing, ultimate strength, stress state, rockburst hazard rating
Abstract
The influence of jointing on the stability of adjacent rock mass is analyzed using the coefficient of structural weakening and the joint spacing. The gravity-tectonic stress field of ore bodies in Gornaya Shoria, including the azimuth of the principal horizontal stresses is characterized. The laboratory tension tests of combinations of support systems as well as the small-scale extension tests of rock bolts made of different materials are discussed. The framework for a multi-factor digital model of safe and efficient support design for iron ore mines in Gornaya Shoria is based on the stability assessment of adjacent rock mass in terms of jointing and stress state.
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