中空注浆锚索、锚杆在石炭系破碎围岩支护中的应用

Application of hollow grouting anchor cable and anchor in the support of Carboniferous broken surrounding rock

本文针对挖金湾煤业公司石炭系山4#层二盘区南回风巷工作面顶板炭质泥岩节理裂隙发育性松软,易破碎,顶板控制难度大,以及掘进遇断层,现有支护方式难以满足要求的难题。根据现场地质情况,采用中空注浆锚索、锚杆进行补强加固,现场应用结果表明,较好地控制了高应力软岩巷道的大变形,,取得了良好的效果,具有较强的推广价值。

The carbonaceous mudstone joint fissures on the roof of the south return airway in the second section of the Carboniferous Mountain 4# layer of the Wajinwan coal mine are soft, easy to break, difficult to control the roof, and the faults in the excavation, the existing support methods are difficult to meet the requirements of the problem. According to the site geological conditions, the hollow grouting anchor cable and anchor rod are used for reinforcement. The field application results show that the large deformation of high stress soft rock roadway is well controlled, and good results are obtained, which has strong promotion value.