玉溪煤矿主斜井变形破坏机理分析

发布时间：2018-06-12 07:49

本文选题：深部斜井 + 空间层位　；参考：《西安科技大学》2017年硕士论文

【摘要】：煤矿深部井底硐室开挖诱发临近巷道围岩失稳严重影响矿井建设和安全生产。基于深部斜井围岩稳定性力学分析,揭示在与斜井相交叉的巷道和硐室开挖产生的扰动应力影响下斜井围岩变形破坏机理,对深部巷道围岩控制及矿井安全高效开采具有重要意义。论文研究以玉溪煤矿深部斜井受与之交叉的巷道和硐室开挖对围岩变形的影响为工程背景,建立了考虑空间几何关系的巷道围岩力学模型,并借助计算机辅助工程程序(CAE-Midas GTXNX)和三维有限差分程序(FLAC3D)构建了数值模型,采用理论分析与数值模拟相结合的方法,分析得出在扰动应力影响下深部斜井交叉巷道及硐室围岩应力与变形规律,揭示深部软岩斜井变形破坏机理,提出适于玉溪煤矿深部斜井底鼓治理方案,并应用于现场加固工程。研究结果表明:主斜井区域地质赋存条件特殊性表现在其夹持于向斜与背斜地质构造之间,水平构造应力成为影响围岩变形的主要因素;建立围岩垂直应力(FV)与水平应力(FH)的平衡判据方程,得出机头硐室与主斜井交叉位置水平应力(FH)占主导;数值模拟表明巷道围岩主应力区位于模型中开挖斜井两帮底角,成为引起底鼓的主要原因。针对玉溪煤矿底鼓治理问题,提出注浆锚索与钢筋混凝土联合治理方案,现场应用效果显著。这为进一步研究深部穿层斜巷受掘进扰动影响巷道围岩变形的预测与控制提供了有效方法。
[Abstract]:The instability of surrounding rock of adjacent roadway induced by underground chamber excavation in deep coal mine seriously affects mine construction and safety production. Based on the mechanical analysis of surrounding rock stability of deep inclined shaft, the mechanism of deformation and failure of surrounding rock in inclined shaft is revealed under the influence of disturbance stress caused by excavation of tunnel and chamber which intersects with inclined shaft. It is of great significance to the control of deep roadway surrounding rock and the safe and efficient mining of mine. Based on the influence of tunnel and chamber excavation on the deformation of surrounding rock in deep inclined shaft of Yuxi coal mine, a mechanical model of surrounding rock of roadway considering spatial geometry is established in this paper. The numerical model is constructed with the aid of CAE-Midas GTXNX and 3D finite-difference program FLAC3D. the method of combining theoretical analysis with numerical simulation is adopted. Under the influence of disturbance stress, the stress and deformation law of deep inclined shaft cross roadway and chamber surrounding rock are obtained, the deformation and failure mechanism of deep soft rock inclined shaft is revealed, and the scheme for controlling the bottom heave of deep inclined shaft in Yuxi coal mine is put forward. And applied to the field reinforcement project. The results show that the regional geological occurrence conditions of the main inclined well are characterized by their interlocking between syncline and anticline geological structures, and the horizontal tectonic stress is the main factor affecting the deformation of surrounding rock. The equilibrium criterion equations of vertical stress (FV) and horizontal stress (FH) of surrounding rock are established, and it is concluded that horizontal stress (FH) dominates the intersection position between the chamber and the main inclined shaft, and the numerical simulation shows that the main stress zone of roadway surrounding rock is located in the bottom angle of two sides of the inclined shaft excavated in the model. Become the main cause of the bottom drum. Aiming at the problem of floor drum treatment in Yuxi coal mine, the joint treatment scheme of grouting anchor cable and reinforced concrete is put forward, and the effect of field application is remarkable. This provides an effective method for further studying the prediction and control of surrounding rock deformation of deep inclined roadway affected by tunneling disturbance.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD35

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