掘锚交叉综掘工艺工业性试验研究

Study on industrial test of fully mechanized fast excavation technology of alternating with advancing or bolting

  • 摘要: 针对传统巷道掘进工艺存在掘进快、支护慢的难题,塔山煤矿引进了锚杆钻车,开发了掘锚交叉综掘工艺,并对其进行了工业性试验研究。通过对工艺实施过程相关参数进行监测,得出结论:巷道开挖支护60 d后,左右围岩日收敛速率小于0.1 mm/d,说明巷道收敛已经趋于稳定,最大锚杆受力为206 kN,最大锚索受力为305 kN,均在安全范围,锚固力大为提高,离层得到有效控制。该工艺实现了减员10%,支护效率提高41%,掘进工效提高33.3%,可以推广应用。

     

    Abstract: In view of problems of fast excavation and slow supporting in traditional roadway excavation technology, anchor drill rig was introduced in Tashan Coal Mine, fully mechanized fast excavation technology of alternating with advancing or bolting was developed, and industrial test of the technology was studied. Through monitoring related parameters in technique implementation process, the following conclusions was obtained : convergence rate of around surrounding rock is less than 0.1 mm/d after roadway excavation support 60 d, explains that roadway convergence is stabile, the maximum rock bolt stress is 206 kN, anchor cable force is 305 kN, all are in the range of security. The conclusion shows that the technology can greatly improve anchoring force and control abscission layer. The technology achieves 10% attrition, improve 41% support efficiency and 33.3% drivage efficiency, which can be popularized and applied.

     

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