安家岭露天煤矿采空区影响下的边坡稳定性研究

发布时间：2018-06-09 21:24

本文选题：边坡 + 地下采空区　；参考：《辽宁工程技术大学》2013年硕士论文

【摘要】：边坡的稳定性研究在岩土工程领域中占有相当重要的位置。边坡一旦发生失稳破坏,会对人民群众的生命财产安全造成严重的威胁及危害。而地下采空区作为影响边坡稳定性的众多外部因素之一,使得边坡稳定性的问题变得更加复杂。地质构造、岩体结构、采空区位置、采矿方法、边坡形状及采场所在位置的不同,都会产生截然不同的后果。采空区对边坡稳定性的影响主要有：一是打破了边坡岩体内部应力的分布特征,加速节理裂隙的发育,降低岩体的总体强度；二是在边坡开挖的过程中会造成采空区上覆岩体的塌陷、变形等危害。论文结合安家岭露天矿工程实例,采用理论分析、现场调研、极限平衡分析和数值模拟等方法分析采空区对边坡稳定性的影响及破坏模式。通过应用极限平衡理论的SLIDE软件计算无采空区工况下边坡的稳定系数,以及应用极限平衡理论的SLIDE软件和有限元强度折减理论的大型通用软件ANSYS分别对无采空区和存在采空区时的边坡状态进行数值模拟,研究边坡内部岩体的应力应变特征,分析其破坏模式。通过对比分析,揭示露天矿边坡在采空区作用下的变形破坏特征,为安家岭露天矿的安全生产提供科学依据,也为存在类似情况的露天矿提供参考。
[Abstract]:The study of slope stability plays an important role in geotechnical engineering. Once slope failure occurs, it will cause serious threat and harm to the safety of people's life and property. As one of the external factors affecting slope stability, underground goaf makes slope stability more complicated. Different geological structure, rock mass structure, goaf location, mining method, slope shape and mining site, The main effects of goaf on slope stability are as follows: first, it breaks the internal stress distribution characteristics of slope rock mass, accelerates the development of joints and fissures, and reduces the overall strength of rock mass; Secondly, it will cause the collapse and deformation of the overlying rock mass in the goaf during the excavation of the slope. In combination with the engineering example of Anjialing open-pit mine, the paper adopts theoretical analysis, field investigation, and so on. Limit equilibrium analysis and numerical simulation are used to analyze the influence of goaf on slope stability and failure mode. The slope stability coefficient under the condition of no goaf is calculated by using the slip software based on the limit equilibrium theory. With the help of the limit equilibrium theory and the finite element strength reduction theory, ANSYS, the numerical simulation of the slope state with and without goaf is carried out, and the stress and strain characteristics of the rock mass inside the slope are studied. The failure mode is analyzed. Through comparison and analysis, the characteristics of deformation and failure of open-pit slope under the action of goaf are revealed, which provides scientific basis for safe production of Anjialing open-pit mine, and also provides reference for opencast mine with similar situation.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU43

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