骑跨采动压巷道围岩稳定性数值模拟

针对巷道围岩遇水膨胀软化、岩石流变特性显著及长期受采动支撑压力作用的特点,应用FLAC数值软件分析骑跨采动压巷道在不同垂距及水平距离下巷道围岩的稳定性,并研究巷道围岩应力场、变形场及塑性区的变化特征.研究结果表明：巷道围岩变形表现为以底鼓变形最大,两帮变形次之,顶板变形量相对较小的特点;受支撑压力的影响,巷道围岩的应力、变形及塑性区分布呈现明显的不对称性;随着垂距及水平距离的增加,巷道围岩应力及变形呈现出不同程度的减小趋势.

Numerical Simulation of Rock Mass Stability in Mining Dynamic Pressure Straddling

In order to solve the problems of roadway expansion resulted from water softening, rock mass rheology, and the long-term support pressure by the mining features, the FLAC numerical analysis software is applied to analyze the stability of surrounding rock in ride cross-mining tunnel in different vertical and horizontal distance, to study the stress field, the deformation field and the variation of the plastic zone of surrounding rock. The results show that the bottom show the maximum deformation, which ts followed by two side, and the roof＇s deformation is relatively small; that the surrounding rock stress, deformation and plastic zone distribution show obvious asymmetry as a result of the impact of support pressure; and with the increase of vertical and horizontal distance, the stress and deformation of the surrounding rock show different degrees of decreasing trend.