深井大松动圈软岩巷道支护技术

Support Technology for Deep Mine Soft Rock Roadway with Big Loose Ring

针对车集煤矿23下部采区复杂的围岩条件及原支护形式下的巷道破坏情况,对23下部采区轨道下山的地应力及围岩松动圈进行了测试,测试结果表明巷道水平应力大于垂直应力,地应力特征为水平应力场型,巷道围岩松动圈属于大松动圈软岩巷道。依据连续梁支护原理,采用大锚杆配合纵横向钢带交错联合支护方式,并强化了帮部的支护,实现了巷道围岩的整体控制,有效地防止了巷道的围岩变形,取得了较好的支护效果,为相似条件下的巷道支护提供一定的技术借鉴。

Aiming at the complicated surrounding rock condition and roadway failure under the original supporting form in the lower 23 mining area of Juji Coal Mine,the ground stress and surrounding rock loosening zone of the lower 23 mining area are tested.The results show that the horizontal stress of the roadway is greater than the vertical stress,and the ground stress characteristics are of the horizontal stress field type,and the roadway is soft rock roadway with big loose ring.According to the principle of continuous beam support,the large bolt combined with longitudinal and transverse steel strip staggered combined support is adopted,and the support of the side is strengthened,overall control of the surrounding rock of the roadway is realized,deformation of the roadway surrounding rock is effectively prevented,and better supporting effect is obtained,which provides certain technical references for the roadway support under similar conditions.