软岩巷道掘进扰动机理及范围分析

Mechanism and Range Analysis of Disturbance in Soft Rock Roadway Driving

针对软岩巷道掘进扰动作用大、围岩变形严重的问题,以山西煤炭运销煤集团四明山煤矿软岩巷道地质条件为基础,采用理论分析与数值模拟的方法,对软岩巷道掘进扰动机理及扰动影响范围进行了研究。研究结果表明,增大巷道之间的距离可以减弱掘进所带来的扰动影响,巷道掘进的影响区域主要为以掘进头为圆心、半径40 m的圆形区域,当超出该区域后,围岩受到掘进的扰动影响基本趋于平稳。

In view of the problems of large disturbance action and serious deformation of surrounding rock in soft rock roadway driving,and based on the geological conditions of soft rock roadway in Simingshan Coal Mine of Shanxi Coal Transportation and Sales Group,this paper studied the disturbance mechanism and influence scope of soft rock roadway driving by theoretical analysis and numerical simulation.The research results show that increasing the distance between the roadways can reduce the disturbance effect caused by driving.The main area of the influence of tunneling is a circular area with the excavation head as the center and the radius of 40 m,when the area is exceeded,the surrounding rock is basically stable under the disturbance of driving.