深部煤矿应力分布特征及巷道围岩控制技术

Stress distribution features of deep coal mine and control technique of surrounding rock

针对巷道围岩遭受应力破坏,造成巷道变形,原有锚杆部分失效的问题,某矿采用"喷锚注"控制围岩技术,对巷道进行监测,观测围岩顶板下沉位移和两帮移近位移量。结果表明,该技术使破碎围岩胶结形成整体,注浆锚杆将隔离拱、压缩拱、加固拱组合起来,有效的提升了围岩的稳定性和承载性。

Based on deformation of surrounding rock caused by stress faliure and partial failure of existing anchor rods,control technique of'shotcrete bolt grouting'was used to monitor roadway to observe subsidence displacement of surrounding rock roof and displacement of two groups. The results showed that the fractured surrounding rock was cemented into a whole, the grouted bolt combined isolation arch, compression arch and reinforcing arch, which effectively improved stability and bearing capacity of surrounding rock.