高水平构造应力巷道围岩稳定性数值模拟分析及控制

Numerical simulation analysis and control of high level tectonic stress surrounding rock stability

针对高水平构造应力巷道易失稳的难题,采用数值模拟的方法,分析了巷道围岩响应特征,提出了底板采用锚索束注浆加固的治理方案,并进行现场工业性试验。结果表明:新的支护体系可大幅度提高巷道围岩初期支护强度及承载能力,顶底板移近量为142 mm,两帮移近量为123 mm,保证了巷道围岩的完整性和稳定性。

Based on the unstability of roadway caused by high level tectonic stress, with numerical simulation, the response characteristic of roadway surrounding rock was analyzed, anchor cable grouting reinforcement was adopted in floor, with industrial experiment on the site. The result showed that the new support system could largely improve the initial support intensity and loading capability of the roadway surrounding rock, roof-to-floor convergence142 mm, two sides convergence123 mm, the integrity and stability of roadway surrounding rock was achieved.