掘进巷道过背斜构造内陷落柱巷道支护技术研究

Study on Tunnel Support Technology of Collapse Column in Over-anticlinal Structure of Excavation Roadway

为解决掘进巷通过背斜、陷落柱等综合地质构造时支护问题,进行了数值耦合模拟,模拟结果显示90 d时,陷落柱和巷道整体应力集中区域融合,预计120 d整体垮落。制定了支护措施,支护措施为U型钢棚结合锚索网锚固技术,实施完成后进行了效果考察,考察显示,深部位移形变最大量为26mm,浅部位移形变量最大值为7 mm。

In order to solve the problem of supporting the roadway through the comprehensive geological structure such as anticline and collapse column,the numerical coupling simulation was carried out.The simulation results show that the collapse column and the overall stress concentration area of the roadway fuse in 90 days,and the overall collapse is expected to occur in 120 days.Support measures were developed,including U-shaped steel shed combined with anchor cable net anchoring technology.After implementation,the effect was investigated,and the investigation showed that the maximum amount of deep displacement deformation was 26 mm,and the maximum value of shallow displacement shape variable was 7 mm.