地应力分布规律对巷道围岩稳定性的影响研究

Study on Affecting of In-situ Stress Distribution Law on Stability of Roadway Surrounding Rock

为了揭示地应力分布规律对巷道围岩稳定性的影响,采用数值计算和理论计算相结合的研究方法,研究了地应力场对巷道围岩稳定性的影响。研究结果显示:巷道围岩所处的地应力场类型不同,其围岩稳定性差别较大;当巷道围岩处于构造应力场下时,水平应力对于顶板下沉量的影响要大于对两帮内移量的影响;自重应力场下,垂直应力对顶板和两帮位移量的影响趋势基本一致。

In order to reveal the influence of stress distribution law on the stability of surrounding rock,theoretical analysis and numerical simulation are used to study the influence of the stress distribution law on the stability of surrounding rock. Research results show that the influence law of different types stress field on the stability of the surrounding rock is obviously different. Under tectonic stress field, the effect of horizontal stress on the roof subsidence is greater than that the two groups. Under the gravity stress field,the influence of vertical stress on the roof and displacement of the two groups are basically the same.