本文選題：露天礦　切入點：邊坡穩(wěn)定性　出處：《遼寧工程技術大學》2015年碩士論文

【摘要】：斷層對邊坡穩(wěn)定性的影響較為復雜,給露天礦安全生產(chǎn)造成較大威脅,尤其對于順傾層狀邊坡,在斷層與多個順傾弱層的綜合作用下,其變形破壞機制與穩(wěn)定性問題是露天開采領域亟待解決的技術難題之一。論文以元寶山露天礦東幫為工程背景,綜合運用現(xiàn)場調研、理論分析、極限平衡理論、數(shù)值模擬等手段和方法,研究了斷層位置及傾角不同時順傾層狀邊坡滑移模式及穩(wěn)定性的變化規(guī)律,分析了邊坡的空間變形破壞機制。研究表明,邊坡穩(wěn)定性隨著斷層位置與傾角變化而變化的根本原因是滑坡模式的改變；當弱層傾角p和斷層傾角6滿足β+6≤90°時,邊坡穩(wěn)定性隨著斷層向邊坡內側偏移近線性增大,直至偏移超過90m時,滑移模式與穩(wěn)定系數(shù)不再變化；當45°≤δ≤60°時,邊坡穩(wěn)定性隨著斷層傾角增大近線性增大,直至δ≥65°時,滑移模式與穩(wěn)定系數(shù)不再受斷層影響；多個弱層的存在對邊坡巖體變形與穩(wěn)定性具有一定的疊加效應,弱層在巖體自重應力作用下產(chǎn)生塑性屈服是滑坡的直接原因。為元寶山露天煤礦東幫邊坡治理提供指導,為類似條件下邊坡穩(wěn)定性分析與控制提供借鑒。
[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，

本文編號：1729921