孔隙水压力对高应力软岩巷道稳定性影响的数值仿真

为了研究孔隙水压力对深部高应力软岩巷道围岩稳定性的影响规律,利用有限差分程序对不同孔隙水压力工况下深部软岩巷道围岩稳定性及孔隙水压力分布规律进行了数值仿真,结果表明:随着孔隙水压力的增加,围岩应力集中程度及其影响范围呈增加趋势,顶底板集中区到巷道中心点的距离逐渐趋于定值;随着孔隙水压力的增加,围岩位移量增加,其趋势为:两帮明显大于顶板,顶板大于底板,围岩治理的重点在于两帮收敛变形控制。

Numerical Study on the Effect of Pore Water Pressure on Stability of Surrounding Rock of High Stress Soft Rock Roadway

In order to research the effect laws of pore water pressure on stability of surrounding rock of roadway of high stressed soft rocks in deep,the finite difference program is used to simulate the stability of surrounding rock with different pore water pressure and the distribution laws of water pressure.The results show that,Along with the pore water pressure increases,stress concentration value in surrounding rock and concentration range increases,the distance from the biggest stress concentration position to the mid-point of the roadway tends to gradually fixed value;And along with the pore water pressure increases,displacements of two sides measured resulted from pore water pressure than roof,roof is greater than floor,therefore,the key of surrounding rock with pore water pressure management is deformation of two sides control.