巷道支护不同参数对锚杆性能的影响分析

Analysis of Different Parameters of Roadway Support on the Performance of the Anchor Rod

针对煤矿工作面巷道支护效果差,采用数值模拟分析方法,以某矿5107工作面为研究对象,建立数值模拟模型,分析不同锚杆间排距、锚杆直径和长度的支护效果,确定巷道锚杆支护的最优参数,设置监测点,分析不同预紧力下巷道表面的位移量和速度、巷道顶板离层以及锚杆受力情况。结果表明:随着预紧力的增大,锚杆的支护性能得以提升,确保了矿井的安全开采。

In view of the poor effect of roadway support in coal mine, the numerical simulation analysis method is adopted to study 5107 working face of a mine. The numerical simulation model is established. The supporting effect of row distance, diameter and length of bolt between different bolts is analyzed, the optimal parameters of bolt support are determined, monitoring points are set up, displacement and speed of roadway surface under different preload forces are analyzed The results show that the support performance of the bolt is improved with the increase of the preload force,which ensures the safe mining of the mine.