大断面煤巷支护技术优化及应用

Optimization and application of support technology in large section coal roadway

采用FLAC^(3D)有限差分程序对不同支护参数巷道围岩变形规律进行了模拟分析。结果表明增加锚杆长度能有效应对巷道围岩破碎程度;增加锚索长度和直径,对围岩可施加的预应力越高,巷道围岩发生离层、变形的可能性越小,支护效果也就越好,能有效控制围岩的强烈变形。

The FLAC3D finite difference program is used to simulate the deformation of surrounding rock of roadway with different supporting parameters. The results show that the increase of bolt length can have effect on rock crushing degree; the increase of the cable length and diameter and the higher pre-stress can decrease the the possibility of separation and deformation of surrounding rock, the supporting effect is better, and can effectively control the surrounding rock strong deformation.