底角锚杆控制巷道底臌的数值模拟

Numerical simulation of floor heave with corner anchor control

随着煤矿开采深度的增加,巷道底臌现象越来越严重。为了寻找一种有效的控制底臌方法,借助数值模拟手段对施加底角锚杆的深部巷道进行受力分析。结果表明:对底板实加底角锚杆后,应力区向巷道深部转移,围岩应力对底板的影响降低,巷道变形量减小。模拟结果及现场应用均证明在条件适合地区,底角锚杆控制技术可以有效控制巷道底臌。

Aimed at seeking an effective method of controlling increasingly serious floor heave arising from greater mining depth, this paper describes the use of numerical simulation method to analyze the deeper roadway under the stress due to bottom anchor application. The results show that the application of bottom anchor in roadway floor results in transference of the stress to the deeper area of roadway, less in- fluence of rock stress on floor, and less deformation of roadway. Both numerical simulation and practical application prove that, the bottom anchor-controlling technique, when used in areas with suitable condi- tions, affords an effective solution to floor heave.