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| dilatancy theory for identification of PREMONITORY INFORMATION of ROCK BURST |
| Pan Liyou1，2，Yang Huizhu1 |
| (1Department of Engineering Mechanics，Tsinghua University， Beijing 100084 China) (2Shandong University of Science and Technology， Tai′an 271019 China) |
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Abstract Based on the experiments and the numerical simulations of the fracture and instability of impact coal mass，the deformation and break of coal mass are divided into 3 stages，namely，elastic stage，nonlinear stage and mutation stage. The dilatation process of coal mass is depicted by 3 characteristic quantities，namely，volume compression，steady dilatation and dilatation mutation. The dilatation model of rock burst is established. Dilatancy theory explains the stability and mutation of premonitory information of rock burst. It is the theoretical basis for identification of premonitory information of rock burst. The software RFPA is used to validate the relation between dilatation mutation and premonitory information of acoustic emission.
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LI Botao1, 2, 3, TAN Yuxuan1, LIN Haifei4, 5*, WEI Jianping1, 2, 3, ZHANG Hongtu1, 2, 3, LI Shugang4, 5, WEI Zongyong4, 5, WANG Pei4, LUO Rongwei4, LIU Yanwei1, 2, 3. Mechanical properties and mesoscopic damage evolution of coal under liquid-nitrogen freezing at different initial temperatures[J]. , 2026, 45(6): 1757-1772. |
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2004, Vol. 23 
