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

被引：0

作者：

GAO, Fu-qiang ^{[1
,2
]}

XIE, Yao-she ^{[3
]}

机构：

[1] Mining and Designing Branch, Central Coal Research Institute, Beijing, 100013, China

[2] Department of Earth Sciences, Simon Fraser University, Burnaby, V5C2Z9, Canada

[3] School of Mines, China University of Mining and Technology, Xuzhou, Jiangsu 221008, China

来源：

Mining Science and Technology | 2009年 / 19卷 / 04期

关键词：

Rock bolting - Rock mechanics - Compressive strength - Rocks - Numerical models - Foundations;

D O I：

10.1016/S1674-5264(09)60079-X

中图分类号：

学科分类号：

摘要：

To investigate the resist-decreasing effects of rock bolts on the strength of the rock mass around a roadway, a comparative study has been carried 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 triaxial 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. © 2009 China University of Mining and Technology.

引用

页码：425 / 429