基于突变理论的采空区稳定性分析与预测-岩土工程专业论文.docxVIP

万方数据 万方数据 摘 要 采空区的稳定性问题一直是地下金属矿山面临的主要问题，采空区的失稳破 坏是矿山的主要破坏形式之一。因此，无论是从提高矿企的经济效益出发，还是 从降低工程风险、减少人民生命财产来说，对采空区稳定性的分析和预测都是至 关重要的。 本文根据鄂东地区中小型矿山处于残矿回收阶段需要对已有采空区的顶板和 矿柱进行回采这一工程背景，在回采采空区顶板时，基于突变理论，建立采空区 稳定性分析的顶板-矿柱尖点突变分析模型，结合该模型，考虑了岩体的流变特性， 定性分析了采空区稳定性的发展路径，给矿山的安全管理提供科学依据；与此同 时，为探究在回采采空区支撑矿柱对采空区稳定性的影响，本文选取了跟采空区 稳定性相关的指标，建立了稳定性分析的突变级数模型，得到了采空区塌陷的临 界突变级数值，并结合实际案例对其进行了验证。 关键词：采空区；突变理论；稳定性分析；突变级数法 I Abstract The Stability problem of excavation is always the key problem that underground iron mines face, unstable failure of excavation is one of the major failure modes of iron mines. Therefore, analysis and prediction of excavation stability is vital for both improvement economic benefit of mine enterprise and risk and loss reduction of a project. Based on the recovering remnant ore engineering practice of middle and small size mine of east area of Hubei Province, the remnant of roof and pillar have to be recycled, on the stage of roof recovery, by setting up the cusp catastrophe model analysis model of roof-pillar with catastrophe to analysis the mine stability, and by considering the creep property of rockmass, development path of stability is analyzed qualitatively, to provide a scientific basis for safety management of mines; meanwhile, to explore the influence on the stability of the excavation during pillar recovery, the paper selects the indicators related to stability of excavation, establishing catastrophe progression model on on stability analysis, finally, the critical catastrophe progression value of excavation collapse is obtained, and carries on the verification in conjunction with actual case projects. Keywords: Excavation;Catastrophe theory;Stability analysis;Catastrophe progression method II 目 录 摘 要.................................................................................................................................I Abstract ............................................................................................................................. II