掘进巷道过断层破碎区支护应用分析

Supporting Application Analysis of Drifting Tunnel Passing through Fault and Broken Zone

为确保2002巷安全快速过F3断层区,减少围岩破碎现象,拟对断层区围岩支护进行优化,决定采取“管棚注浆+喷射混凝土”作为临时支护,采用“钢筋网+让压锚索+π型钢棚”作为永久支护等联合支护方案。应用该优化方案后,断层区围岩应力显现现象得到明显改善,保障了巷道掘进安全。

In order to ensure the safe and rapid passage of the F3 fault area in 2002 Lane and reduce surrounding rock fragmentation,the article proposes to optimize the surrounding rock support in the fault area,adopting"pipe shed grouting and sprayed concrete"as temporary support,and using"steel mesh,pressure anchor cable andπshaped steel shed"as permanent support and other joint support schemes,which significantly improves the stress manifestation of the surrounding rock in the fault area and ensures the safety of tunnel excavation.