超前锚杆支护在破碎带软岩巷道中的应用

Application of Advanced Bolt Supporting in Soft Rock Roadway in Fracture Zone

随着巷道埋深的增加,巷道围岩也显现出软岩的特性,巷道支护难度相应增大。针对大兴安岭岔路口钼矿混合井-90 m水平大件运输道的工程条件,采用安全合理的施工顺序和超前锚杆+钢拱架网喷的联合支护方式对围岩进行维护,取得了良好的支护效果,实现了矿井的安全生产。

With the increasing of the roadway depth, some surrounding rock also show several characteristics of soft rock, and the road- way supporting become difficult accordingly. Aiming at the complex engineering condition of the - 90 m level large transport roadway in Chalukou Molybdenum Mine in Greater Higgnan Mountains, a safe and reasonable construction sequence was proposed, the combined supporting method with the advanced bolt and steel arch sprayed concrete was also adopted, which has obtained a good supporting effect, and has realized the safety production of coal mine.