矿震扰动巷道帮部卸压区域锚索加固研究及应用

为研究动载扰动巷道帮部补打锚索对巷道围岩控制及冲击地压防治的效果,以某矿孤岛工作面矿震扰动巷道为研究对象,采用有限差分数值计算软件FLAC,研究了动静载力作用下常规锚杆支护和补打帮部锚索加强支护方式对巷道围岩的控制效果.研究结果表明:矿震扰动的参与使巷道围岩更易发生冲击破坏,围岩稳定状态随矿震能量增加而逐渐劣化;帮部锚...

Research and application on anchor cable reinforcement of distressed zone in sidewall along roadway under dynamic disturbance

In order to study the effect of supplementary anchoring cables on the roadway surrounding rock control and the prevention of rock burst caused by the dynamic load disturbance,the mine seismic disturbance roadway of an isolated island working face of a mine was taken as the research object,and the finite difference numerical calculation software FLAC was used to calculate the dynamic and static load forces.Numerical study of the control effect of two supporting methods of conventional bolt supporting and reinforced supporting with anchor cable at the supplementary strut part on the surrounding rock of the roadway has been carried out.The research results showed that,the participation of mine earthquake disturbance makes the surrounding rock of roadway more vulnerable to impact failure,the stability state of surrounding rock gradually deteriorates with the increase of mine earthquake energy.the bolt reinforcement at the side can not only reduce the deformation of the surrounding rock of the roadway under static load conditions,but also improve the anti-vibration disturbance ability of the surrounding rock of the roadway;cooperate with the decompression project,it can play a certain effect of prevention and control of rock burst.Numerical simulation results and field practice showed that,the anchor rope reinforcement of the upper side of the conventional supporting foundation can ensure the safe mining of the working face under the disturbance of the 105 J mine earthquake.