断层对顺倾层状边坡滑移模式与稳定性的影响研究

发布时间：2018-04-10 05:39

  本文选题：露天矿　切入点：边坡稳定性　出处：《辽宁工程技术大学》2015年硕士论文

【摘要】：断层对边坡稳定性的影响较为复杂,给露天矿安全生产造成较大威胁,尤其对于顺倾层状边坡,在断层与多个顺倾弱层的综合作用下,其变形破坏机制与稳定性问题是露天开采领域亟待解决的技术难题之一。论文以元宝山露天矿东帮为工程背景,综合运用现场调研、理论分析、极限平衡理论、数值模拟等手段和方法,研究了断层位置及倾角不同时顺倾层状边坡滑移模式及稳定性的变化规律,分析了边坡的空间变形破坏机制。研究表明,边坡稳定性随着断层位置与倾角变化而变化的根本原因是滑坡模式的改变；当弱层倾角p和断层倾角6满足β+6≤90°时,边坡稳定性随着断层向边坡内侧偏移近线性增大,直至偏移超过90m时,滑移模式与稳定系数不再变化；当45°≤δ≤60°时,边坡稳定性随着断层倾角增大近线性增大,直至δ≥65°时,滑移模式与稳定系数不再受断层影响；多个弱层的存在对边坡岩体变形与稳定性具有一定的叠加效应,弱层在岩体自重应力作用下产生塑性屈服是滑坡的直接原因。为元宝山露天煤矿东帮边坡治理提供指导,为类似条件下边坡稳定性分析与控制提供借鉴。
[Abstract]:The influence of fault on slope stability is more complex, which poses a great threat to the safety production of open-pit mine, especially for the downdip stratified slope, under the combined action of fault and several downdip weak layers.The mechanism and stability of deformation and failure are one of the technical problems to be solved urgently in the field of open-pit mining.This paper takes the east side of Yuanbaoshan opencast mine as the engineering background, and makes comprehensive use of field investigation, theoretical analysis, limit equilibrium theory, numerical simulation and other means and methods.The slip model and stability of the slope with different fault positions and dip angles are studied, and the spatial deformation and failure mechanism of the slope is analyzed.The results show that the fundamental cause of slope stability changes with fault location and dip angle is the change of landslide model, and when the slope angle p and fault dip angle 6 satisfy 尾 6 鈮，

本文编号：1729921