屯兰矿28107皮带顺槽支护技术应用分析

Application Analysis of Belt Entry Support Technology at 28107 Face of Tunlan Colliery

因屯兰矿20105工作面皮带顺槽回采期间变形严重,为保证临近的28107皮带顺槽不出现类似问题,拟采用数值模拟方法对顺槽稳定性进行探讨;分析得到巷道顶板锚杆、锚索承受的最大应力为426.7 kN,超过锚杆、锚索极限拉拔应力,拟定增加U型钢等加强支护措施;实践中,经30天矿压观测,顶板最大位移量98 mm,巷道围岩稳定;该支护技术具有一定推广意义。

Due to the serious deformation of the belt roadway in the 20105 working face of Tunlan Colliery,to ensure that the adjacent 28107 belt entry does not have similar problems,the numerical simulation method is proposed to discuss the stability of the roadway,the maximum stress of roof bolt and anchor cable is 426.7 kN,which exceeds the limit pulling stress of bolt and anchor cable.It is proposed to add U-shaped steel and other strengthening support measures,whose application shows that the maximum displacement of roof is 98 mm,the surrounding rock of roadway is stable and the support technology has certain popularization significance.