大断面巷道高预应力锚杆支护技术研究与应用

Study on the Large Cross- section Tunnel with High Pre- stress Bolt Support in Deep Mine

针对平顶山煤业集团有限公司八矿深部开采的戊9.10煤层辅运巷道的矿压条件,通过理论计算确定合理的巷道断面跨度,计算锚杆长度、间距、直径等主要支护参数。运用数值模拟方法对采取高预应力锚杆支护后的巷道围岩破坏情况分析,得出巷道锚杆支护最优方案,并进行工程应用。结合围岩位移、锚杆锚索受力监测数据分析,验证工程优化的参数设计,为邻近巷道的锚杆支护设计提供理论支撑和技术参考。

According to the underground pressure conditions of the deep auxiliary transport roadway in E9,10 coal seam of No. 8 coal mine of Pingdingshan Coal （Group） Co. Ltd,the paper employes the theoretical formula to cal- culate the sectional span and bolt support parameters, such as the length, diameter, spacing, etc. A bolt roadway support optimal scheme is obtained after the analysis of surrounding rock of roadway damage with a numerical simu- lation method,and applied it in a project. Combining the analysis of displacement of surrounding rock, bolt and ca- ble stress monitoring data, to verify the design parameters of the optimization project, it＇ s helpful for the design theory and technology in the adjacent roadway bolt support.