Supporting technology of huge thick coal roadway under rock burst condition
Based on the roadway of 21121 working face of Qianqiu Coal Mine of Yima Coal Mining Group,using theory analysis, numerical simulation and industrial test method, the characteristics and in fluence factors of happening of rock burst in this geologic condition were analyzed, the type of rock and orientation grading of rock burst were confirmed. The failure mechanisms of country rock in roadway were studied by using RFPA2D. The bolting with wire mesh & joist steel arch support combined supporting meth od was provided by using numerical simulation software FLAC3Doptimizing supporting parameters. The de signed supporting parameters were taken industrial test in the track roadway of 21121 working face. The result of field observation indicates that bolting with wire mesh & joist steel arch support combined support ing method controls the deformation of surrounding rock very well, overcomes the problems of deep embed ding big deformation and rock burst in big-size roadway of huge thick coal under rock burst condition, solves the important task of supporting under this condition, ensures mine regular production.
rock burst roadway bolting support numerical simulation
Shousong Guo LinLiu Zhicheng Yang
China University of Mining and Technology,Faculty of Safety Engineering, Xuzou 221116, China Chongqi China University of Mining and Technology,Faculty of Safety Engineering, Xuzou 221116, China Chongqi Chongqing Research Institute, China Coal Research Institute, Chongqing 400037, China
国际会议
重庆
英文
191-197
2009-05-20（万方平台首次上网日期，不代表论文的发表时间）