Risk evaluation of rock burst through theory of static and dynamic stresses superposition

作     者：李振雷 窦林名 王桂峰 蔡武 何江 丁言露 LI Zhen-lei;DOU Lin-ming;WANG Gui-feng;CAI Wu;HE Jiang;DING Yan-lu

作者机构：State Key Laboratory of Coal Resources and Safe Mining(China University of Mining and Technology) School of Mines China University of Mining and Technology 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2015年第22卷第2期

页      面：676-683页

核心收录：

学科分类：081901[工学-采矿工程] 0819[工学-矿业工程] 08[工学] 

基　　金：Project(51174285)supported by the National Natural Science Foundation of China and the Shenhua Group Corporation Limited,China Project(CXZZ12_0949)supported by the Research and Innovation Project for College Graduates of Jiangsu Province,China Project(SZBF2011-6-B35)supported by the Priority Academic Program Development of Jiangsu Higher Education Institutions,China 

主　　题：rock burst hazard mining stress risk evaluation microseismic monitoring 

摘      要：Rock burst is one of the most catastrophic dynamic hazards in coal mining. A static and dynamic stresses superposition-based(SDSS-based) risk evaluation method of rock burst was proposed to pre-evaluate rock burst risk. Theoretical basis of this method is the stress criterion incurring rock burst and rock burst risk is evaluated according to the closeness degree of the total stress(due to the superposition of static stress in the coal and dynamic stress induced by tremors) with the critical stress. In addition, risk evaluation criterion of rock burst was established by defining the Satisfaction Degree of static stress. Furthermore,the method was used to pre-evaluate rock burst risk degree and prejudge endangered area of an insular longwall face in Nanshan Coal Mine in China. Results show that rock burst risk is moderate at advance extent of 97 m, strong at advance extent of 97-131 m,and extremely strong(i.e. inevitable to occur) when advance extent exceeds 131 m(mining is prohibited in this case). The section of two gateways whose floor abuts 15-3 coal seam is a susceptible area prone to rock burst. Evaluation results were further compared with rock bursts and tremors detected by microseismic monitoring. Comparison results indicate that evaluation results are consistent with microseismic monitoring, which proves the method s feasibility.