锦界矿回采巷道围岩破坏特征与支护参数优化

Surrounding Rock Destruction Characteristics and Support Parameters Optimization of Mining Roadway in Jinjie Mine

针对巷道围岩破坏特征及稳定性控制问题,基于该类围岩的变形特点,对锦界矿某工作面平巷进行了锚固支护参数优化。通过钻孔窥视、岩心试验、松动圈测试等现场试验及数值模拟分析,分析了回采巷道受采动影响时围岩应力分布规律及围岩破坏特征,优化了巷道支护参数。结果表明:受工作面采动影响后,巷道两帮围岩破坏不大而顶底板完整;优化后顶板和两帮支护参数减少了支护强度。工程实践表明:优化后支护参数有效控制了巷道围岩变形,节约了支护成本,提高了掘进效率。

According to the deformation characteristics and stability control of surrounding rock of roadway,based on the deformation characteristics of surrounding rock,the anchoring support parameters of a working face in Jinjie Mine were optimized.Through the field test and numerical simulation analysis of borehole peeping,core test and loose circle test,the distribution law of surrounding rock stress and surrounding rock failure characteristics of mining roadway affected by mining are analyzed,and the roadway support parameters are optimized.The results show that the surrounding rock of the two sides of roadway is not damaged and the top and bottom plates are intact after the mining face is affected;the roof and the two supporting parameters reduce the support strength after the optimization.The engineering practice shows that the optimized support parameters can effectively control the surrounding rock deformation of the roadway,save the support cost and improve the tunneling efficiency.