高应力条件下深埋巷道让压支护的应用

Application of the Yield Pressure Support in the Deep Roadway Under the Condition of the High Stress

针对塔山煤矿实际地质工程条件,通过数值模拟及现场实测对让压支护设计进行优化,有效地控制了采矿工程中的围岩变形。分析结果显示:掘进期间深部巷道顶板的变形最大下沉量约为38 mm,两帮总的收敛量最大值约为60 mm,右帮的变形量约占两帮收敛量的42%。邻近工作面回采期间巷道顶板下沉量随工作面的推进逐渐变大,顶板下沉量和两帮收敛量分别是掘进期间的3.5倍和3.2倍,推过测点120 m后巷道变形速率变缓趋于稳定。

According to the actual geological engineering condition in Tashan mine, the design of the yield pressure support is optimized by the numerical simulation and field measurement, and the surrounding rock deformation in the mining engineering is effectively controlled. The analysis results show that the maximum subsidence of the roof deformation in the deep roadway is about 38 mm during the tunneling, the total maximum convergence of both the roadway＇s sides is about 60mm, the convergence of the right side is about 42% of the convergence of both the roadway＇s sides. The roof subsidence of the adjacent working face increases gradually with the advancing of the working face during stoping, the roof subsidence and the convergence of both the roadway＇s sides are respectively 3.5 times and 3.2 times during tunneling, the deformation rate that pushing 120m of the measuring point becomes slower to the stability.