沂源鲁村煤矿千米混合立井围岩稳定性分析与施工措施

Stability Analysis and Construction Measures of Country Rock of Hybrid Shaft under Thousands Meters in Lucun Coal Mine in Yiyuan County

摘要:

基于沂源鲁村煤矿围岩稳定性差，塑性变形量大的实际情况，采用弹塑性力学分析的方法，分析了鲁村煤矿千米混合立井岩石开挖后围岩应力重新分布情况和塑性变形,进而确定是否采用临时支护措施，以确保施工安全。研究表明鲁村煤矿混合井围岩掘进深度大于780m时,围岩变得不稳定，需要施加锚喷临时支护，同时增加井筒掘进荒断面，预留围岩变形空间。

Abstract:

Due to actual condition of Lucun coal mine in Yiyuan county, such as stability of country rock is poor, and plastic deformation is big, by using elastic-plastic mechanical analysis method, re-distribution of rock stress and plastic deformation of country rocks after rock excavation of hybrid shaft under thousands meters of Lucun coal mine are analyzed. Thus, whether use temporary support to ensure construction safety is determined. As showed by the study results, when the depth of country rock excavation of hybrid shaft in Lucun coal mine is more than 780 m, the rock becomes unstable, and shotcrete temporary support should be used, driving shaft section be increased, and rock deformation space be reserved.