复杂地质条件下巷道交叉点支护技术数值模拟分析

为确定滑动构造区弱粘结围岩巷道扩修的合理方案,优化巷道支护参数,控制巷道变形,采取数值模拟的手段对支护参数进行分析,通过分析比较U29＋2 m锚杆＋注浆、U29＋3 m锚杆＋注浆、U36＋4 m＋注浆锚杆3种复合支护方案,得出U29＋3 m锚杆＋注浆支护方案既满足巷道支护要求,又比较经济合理,采取此种支护方式进行工业性试验,通过巷道扩修后表面位移观测数据可知,该支护方式满足滑动构造应力下巷道支护强度要求,有推广应用价值。

Analysis on Roadway Intersection Supporting Technology Numerical Simulation under Complicated Geological Condition

In order to settle the reasonable plan of sliding structure of bonded area weak surrounding rock roadway,roadway supporting parameters were optimized,roadway deformation was controlled,numerical modeling was adopted to analyze support parameter,through the comparison analysis of U29 ＋ 2 m ＋ 3 m ＋ anchor grouting,U29 grouting,U36 ＋4 m ＋ ＋ anchor bolt grouting three composite support scheme,U29 ＋ 3 m ＋ grouting anchor supporting scheme was reasonable and economic,could meet the needs of roadway support,through the industrial experiment and surface displacement observation data after roadway expansion,the support met the needs of the intensity of the roadway supporting under sliding tectonic stress,with popularization and application value.