大断面复合顶板回采巷道围岩变形规律研究

Study on the deformation law of surrounding rock of entry with compound roof and large cross-section

针对王家岭煤矿20104工作面回采巷道的地质条件,采用数值模拟的方法,分析了锚网索联合支护巷道围岩变形特征;通过现场观测的方法分析了巷道围岩在掘进期间和回采期间的变形规律。结果表明:顶底板、两帮最终累计最大变形量分别为196mm和172mm,巷道变形不大,较好的控制了围岩变形。

According to the geological conditions of 20104 working face roadway of Wangiialing coal mine, using numeri-cal simulation, analyzes the deformation characteristics of roadway surrounding rock using cable anchor combined support ;through the site observation, analyzes the deformation regularity of the surrounding rock in the excavating and mining peri-od. The results show that the cumulative maximum deformation of the roof and bottom, and the two ribs is 196mm and172mm respectively, the roadway deformation is small, better control the deformation of surrounding rock.