论文部分内容阅读
随着煤矿开采深度的不断增大,围岩地应力愈来愈大,巷道经常出现顶板下沉,脱落、两帮收缩、底板鼓起等变形破坏现象,变形破坏严重时,甚至巷道无法使用,严重影响安全生产。郑煤集团白坪煤业公司东风井回风大巷在过软岩段施工中,巷道掘支后过一段时间,便出现喷层开裂、脱皮掉块、底板鼓起等破坏现象,为此,我们在软岩巷道锚网喷支护的基础上增加了锚索支护,提高了支护效果和巷道稳定性。
As the depth of coal mining continues to increase, the stress of surrounding rock is getting larger and larger. The roof often sinks and falls off, the two groups shrink, the base plate bulges and other deformation and destruction phenomena. Even when the deformation and destruction are serious, the roadway can not be used. Seriously affect the safety of production. Zheng Coal Group Baiping Coal Company Dongfeng well return air Lane over the soft rock section of construction, tunnel digging over a period of time, there spray layer cracking, peeled off block, the floor bulge and other damage, therefore, Based on the bolting and shotcreting support in soft rock roadway, we have added anchor cable support to improve the support effect and roadway stability.