Resist-decreasing effects of rock bolts on strength of rock mass around roadway——insight from numerical modeling

作     者：GAO Fu-qiang XIE Yao-she 

作者机构：Mining and Designing Branch Central Coal Research Institute Beijing 100013 China Department of Earth Sciences Simon Fraser University Burnaby VSC2Z9 Canada School of Mines China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China 

出 版 物：《Mining Science and Technology》 (矿业科学技术（英文版）)

年 卷 期：2009年第19卷第4期

页      面：425-429页

核心收录：

学科分类：04[教育学] 081901[工学-采矿工程] 0808[工学-电气工程] 0709[理学-地质学] 0819[工学-矿业工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0403[教育学-体育学] 040302[教育学-运动人体科学(可授教育学、理学、医学学位)] 0807[工学-动力工程及工程热物理] 0708[理学-地球物理学] 0818[工学-地质资源与地质工程] 0815[工学-水利工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 0813[工学-建筑学] 0814[工学-土木工程] 0702[理学-物理学] 

基　　金：Project 2006BAK04B02 supported by the National Key Technology Research & Development Program of China 

主　　题：resist-decrease rock mass strength rock bolts numerical simulation 

摘      要：To investigate the resist-decreasing effects of rock bolts on the strength of the rock mass around a roadway, a compara- tive study has been carded out using the numerical analysis code FLAC3D. An unsupported and a rock bolt supported model have been built for comparison. Two types of rock mass strength, the uniaxial compressive strength （UCS） and the wiaxial compressive strength （TCS） of rock mass have been obtained from each model, using a prepared Fish based on the Mohr-Coulomb criterion. The results indicate that when a roadway is excavated, both the UCS and TCS in a definite local rock mass around the roadway would inevitably decrease, no matter whether the roadway is supported or not. The major decreasing region did not settle in the middle of the roadway surface, but within a deeper horizon into the rock mass. The resist-decreasing effects of rock bolts both on the UCS and the TCS of rock mass around roadway are significant.