骑跨采动压巷道围岩稳定性数值模拟研究
首发时间:2010-12-07
摘要: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数值软件分析了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,研究了巷道围岩应力场、变形场及塑性区的变化特征。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出呈现不同程度的减小趋势。研究结果可为此类巷道围岩的稳定性控制及加固设计等提供参考。
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Mining dynamic pressure straddling Numerical simulation of rock mass stability
Abstract:Roadway expansion for water softening, rheological properties of significant and long-term support pressure by the mining features. use the FLAC numerical analysis software applications, to analysis the stability of surrounding rock 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 showed that: Roadway surface deformation to the end of the drum showed the maximum deformation, deformation, followed by two side roof deformation is relatively small; Surrounding rock stress, deformation and plastic zone distribution showed obvious asymmetry the impact of Support pressure; With the vertical and horizontal distance from the increase of stress and deformation of the surrounding rock show different degrees of decreasing trend. The results of such roadway for the stability control and reinforcement design reference.
Keywords: crossing mining dynamic pressure stability of surrounding rock numerical simulation
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No.4394112519037129****
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