纳林庙二号井巷道支护技术研究与应用

Research and Application of roadway supporting technology in Nalinmiao No. two shaft

通过采用钻孔成像仪窥探围岩结构和破坏范围、锚杆力学性质测试和围岩可锚性试验等现场测试和试验相结合的方法对纳二矿巷道支护性能进行评估,发现巷道顶板浅部破坏较为严重,且存在软弱结构面,锚杆支护三径匹配存在问题,顶锚杆和顶锚索预紧力普遍较低。针对发现的问题采取了积极应对措施,实现了巷道顶板的安全管理。

By explored the structure and damage range of surrounding rock using drilling imaging instrument, bolt mechanical properties testing and surrounding rock anchor test and experimental methods, this paper evaluated the roadway support performance of Nalinmiao No. two shaft, the result showed that the serious destruction is in the shallow of roadway roof, and there is weak structural plane; there are some problems in three diameters matching of bolt supporting; the pre-tightening force of roof bolting and anchor is generally low, according to these problems, some correct methods were taken, and achieved good results.