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《Journal of University of Science and Technology Beijing》 2007-01
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Dynamical destabilization analysis of steep and heavy thick coal seam in a deep-mine under the complex-variable environment based on AE

ZHANG Lijie~ 1,2) , CAI Meifeng~ 1) , LAI Xingping~ 2,3) , ZHANG Yong~ 2,3) , ZHANG Haiyan~ 2) , LV Zhaohai~ 2,3) , REN Fenhua~ 1) 1) Civil and Environmental Engineering School, University of Science and Technology Beijing, Beijing 100083, China 2) Xi'an University of Science and Technology, Xi'an 710054, China 3) Key Lab for Western Safe Mining & Hazard Control, the Ministry of Education of China, Xi'an 710054, China  
The No.5 coal of Huating Coal Mine in China is a deep and heavy thick coal seam. In the coal seam, the dependence of excavation and disturbance is very serious, the difference between the maximum and minimum principal stress levels is greater, and there are frequent destabilizations leading to hazards during mining. Based on the comparison of the acoustic emission (AE) experiment of coal-rock unstable crack propagation and destabilization with their in-situ measurement, this paper investigated the regularity of various dynamics load and comprehensively analyzed the quantificational destabilization characters including variable dynamical specific energy of tension, resistance to compression, and proportional limit of shear under the complex-variable excavation and geological environment.
【Fund】: 国家自然科学基金资助项目(No.10402033 50490271);; 教育部西部矿山开采与灾害控制重点实验室重点资助项目(No.04JS19)
【CateGory Index】: TD325
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