长平煤矿陷落柱区域岩体应力特征及巷道支护技术

Rock mass stress characteristics and roadway support technology in the area of subsided column in Changping Coal Mine

为解决长平矿3#煤构造影响下的巷道围岩支护难题,本文在理论分析、数值模拟基础上,得出了陷落柱区域岩体应力四区分布,并给出塑性应力降低区的理论半径,在现场调研、工程应用基础上,采用超前预注浆及优化巷道锚网索支护,确定了长平矿3号煤巷道过陷落柱区域的支护技术,为矿井安全生产提供了技术保障。

In order to solve the problem of roadway surrounding rock support under the influence of the 3#coal structure in Changping Mine,this paper,based on theoretical analysis and numerical simulation,obtained the four-zone distribution of rock mass stress in the collapsed column area,and gave the plastic stress reduction zone The theoretical radius,on the basis of field investigation and engineering application,adopts advanced pre-grouting and optimized roadway bolt-net-cable support to determine the support technology of Changping Mine 3#coal roadway passing through the collapse column area,which provides safe production in the mine.Technical Support.