Numerical Analysis on Energy-absorbing Coupling Support in Rockburst Roadway
Rock burst which caused great damage to roadway and steel support is a kind of dynamic disaster coming from mining. According to the action principle of energy-absorbing coupling support, the model of surrounding rock-energy absorbing material-steel support is established. The laws of stress and deformation in semi-circular arched and circle roadways are simulated by finite element method. The calculated results show that the stress concentration regions similar as “bilateral ears happened at two top comers of the roadway on the condition of non support. The non-coupling between steel support and surrounding rock in stiffness is the main cause of stress-transfer, and then the steel support is broke down caused by beyond yield strength. The distributions of stress and deformation are tends to be uniform when energy-absorbing coupling support is taken into roadway. And the stress zones of two roadway walls are expending, also the roadway deformation reduces significantly. The comparison of the calculation results show that energy-absorbing coupling support can absorb energy efficiently, increase the reliability of roadway substantially and provide a new method for roadway support.
rock burst coupling support energy absorption numerical analysis
LV Xiangfeng PAN Yishan
School of Mechanics and Engineering, Liaoning Technical University, Fuxin, China, 123000
国际会议
成都
英文
773-777
2010-10-10（万方平台首次上网日期，不代表论文的发表时间）