某煤矿煤巷破坏特征理论分析

Theoretical Analysis of Destruction Characteristics of Coal Roadway in a Coal Mine

为了解决深井高应力软弱围岩稳定性控制技术难题,对煤巷变形破坏特征进行分析,可以得知传统的锚网梁支护结构不能控制住巷道的大变形,根据现场的调查和分析,造成煤巷发生大变形的主要原因:煤层埋深大,应力集中程度高,煤体较为松散,顶板锚索的悬吊作用发挥不利,顶板、两帮锚杆支护作用失效,沿空掘巷护巷煤柱宽度不合理五个方面所造成的,为提供巷道支护优化提供指导。

In order to solve the technical problem of controlling the stability of high stress weak surrounding rock in deep mine, the deformation and failure characteristics of coal roadway are analyzed. It can be known that the traditional bolt-mesh-beam support structure can not control the large deformation of roadway. According to the field investigation and analysis, the main reasons for the large deformation of coal roadway are as follows: deep coal seam,high stress concentration, loose coal body, unfavorablesuspension effect of roof anchor cable, invalid supporting effect of roof and two sides of bolt and unreasonable width of coal pillar in roadway protection along goaf, providing guidance for roadway support optimization.