巨厚辉绿岩侵入区巷道支护技术研究

Study on Supporting Technology with Extra-thick Diabase Intrusion Area

为解决煤矿开采中巨厚辉绿岩侵入区巷道围岩冒顶、片帮等问题,采用工程监测、数值模拟和实验室测试等研究方法,结合巷道围岩塑性区理论,进行巷道围岩破坏机理和控制技术的研究,优化原支护设计方案。结果表明:采用锚杆+锚索的不均匀支护形式和喷浆封闭的二次支护优化方案可以有效提高巨厚辉绿岩侵入区巷道围岩稳定性,降低冒顶、片帮发生概率。

To solve the problems of roof fall and rib spalling with the extra-thick diabase intrusion area in coal mining, the failure mechanism and control technology of surrounding rock in roadway were studied by means of engineering monitoring, numerical simulation and laboratory test, combined with the theory of plastic zone of surrounding rock,and the original supporting design scheme was optimized.The results show that the non-uniform support form of bolt and anchor rope and the spray secondary support optimization scheme of shotcrete sealing can effectively improve the stability of surrounding rock of roadway in the extra-thick diabase intrusion area, and reduce the probability of roof caving and slicing.