论文部分内容阅读
开采深度的增加引起巷道围岩松动圈厚度增大,浅埋深巷道锚杆的支护参数已经不能适应深部巷道的支护要求。以河南首山矿为例,通过分析300,600 m埋深巷道围岩松动圈厚度,在充分考虑采动支承压力的影响和围岩变形破坏特征的条件下,优化得出了“加长锚杆+关键部位加密锚杆”的支护方案,并运用理论分析、数值模拟的方法,研究了原方案和优化后方案的围岩应力及位移分布差异。现场应用表明:优化后的锚杆参数明显改善了支护效果,巷道顶底板移近量为63 mm,两帮收敛量为67 mm,为深部巷道锚杆支护参数的优化提供了技术支持。
The increase of mining depth causes the thickness of the loose ring of roadway rock to increase, and the support parameters of the shallow shaft buried roadway bolt can no longer meet the support requirements of deep roadway. Taking the Shushan Mine in Henan Province as an example, by analyzing the thickness of the surrounding rock of 300,600 m deep roadway, taking into account the influence of mining supporting pressure and the deformation and failure characteristics of surrounding rock, Key part of the encryption anchor "support program, and the use of theoretical analysis, numerical simulation method, the original program and the optimized program of the surrounding rock stress and displacement distribution differences. The field application shows that the optimized bolting parameters have significantly improved the support effect. The amount of roof and floor movement near the roadway is 63 mm, and the convergence of the two approaches is 67 mm, which provides technical support for the optimization of bolting parameters in deep tunnels.