Study on rock burst mechanisms based on dynamic Mohr?s stress circle
GONG Weili1，2，GAO Xia1，2，SUN Yaxing1，2，HE Manchao1，2
(1. State Key Laboratory for Geomechanics and Deep Underground Engineering，China University of Mining and Technology(Beijing)，Beijing 100083，China；2. School of Mechanics and Civil Engineering，China University of Mining and Technology(Beijing)，Beijing 100083，China)
Abstract：The concept of dynamic Mohr?s stress circle is proposed by extending the classical Mohr?s circular stress analysis to the static loading and dynamic unloading failure process during rock burst generation. Based on this，the dynamic Mohr-Coulomb criterion and theoretical model for predicting fracture angles of rock burst failure are established. These theoretical analyses well explain the cohesion loss phenomenon in dynamic failure such as rock burst，and show that the cohesion loss value and the rock fracture angles can be predicted according to the static loading stress. At the same time，rock burst experiment on granite was carried out and a good agreement between the analytical models and experimental results. Since the static loading stresses could be determined by means of instrumental measurement and prior knowledge in rock mechanics，the theoretical findings obtained in this research is of practical significance.
宫伟力1，2，高 霞1，2，孙雅星1，2，何满潮1，2. 基于动态莫尔圆的岩爆机制研究[J]. 岩石力学与工程学报, 2019, 38(S2): 3321-3329.
GONG Weili1，2，GAO Xia1，2，SUN Yaxing1，2，HE Manchao1，2. Study on rock burst mechanisms based on dynamic Mohr?s stress circle. , 2019, 38(S2): 3321-3329.
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2019, Vol. 38 
