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伴随岩土体沉陷产生的斜坡岩土体滑移，往往导致大规模滑坡地质灾害的产生。正确认识其发生机理和确定正确、合理的评价方法，是国内外地质工程和岩土工程界关心而又急需解决的主要问题之一。针对这一问题，通过理论分析、洞室开挖的有限元数值模拟及底摩擦试验物理模拟等手段，进行了斜坡体地质结构模式、不同地质结构模式及岩体参数时斜坡体变形与滑动破坏机理、沉陷作用力确定、斜坡稳定评价系统方法共４个方面的研究，取得了系列研究结果，主要内容包括： （１）以岩体结构理论为基础，以斜坡稳定性评价为目的，提出了进行岩土体沉陷影响下斜坡破坏式研究的１３种斜坡地质结构模式。 （２）数值模拟显示，斜坡体下洞室开挖等引起的沉陷效应，将会对斜坡稳定产生重大影响，其影响程度主要看沉陷部位在斜坡体中的相对位置分布。对斜坡稳定产生影叼的开挖范围，一般只在滑动面垂直投影范围的一定深度内，而在此区域以外，则对斜坡稳定性影响较小。任何斜坡下的开挖，针对不同的潜在滑动面，都存在一个最不利开挖位置，此位置位于潜在滑动面垂直投影的１／２处至滑动面坡面剪出口投影点之间一定深度内，最不利开挖位置分布与洞室大小、斜坡高度关系较小，而与斜坡坡角大小有一定关系：开挖洞室的大小对?
The slip of slope rock mass with the settlement of rock and soil often leads to the occurrence of large-scale landslide geological disasters. Correctly understanding its occurrence mechanism and determining the correct and reasonable evaluation method are one of the main problems which the geotechnical engineering and geotechnical engineering community care and urgently need to solve. In response to this problem, the slope structure deformation and sliding failure are analyzed through theoretical analysis, finite element numerical simulation of cavern excavation and physical simulation of bottom friction test. Mechanism, determination of subsidence force and slope stability evaluation system, a series of research results have been obtained. The main contents include: (1) Based on the rock mass structure theory and the purpose of slope stability evaluation, Thirteen slope geological structure models are studied for slope failure research under the influence of rock mass subsidence. (2) The numerical simulation shows that the subsidence caused by the excavation of cavern under slope body will have a significant impact on the stability of the slope. The degree of influence mainly depends on the relative position distribution of the subsidence in the slope body. The range of excavation that affects the stability of the slope is generally only within a certain depth of the vertical projection range of the sliding surface. Outside this area, the stability of the slope is less affected. Excavations under any slope have one of the most unfavorable excavation positions for different potential sliding surfaces within a certain depth between the projection of the vertical projection of the potential sliding surface to the projection point of the shear face of the sliding surface The distribution of the most unfavorable excavation has little to do with the size of the cavern and the height of the slope but has some relation with the slope angle of the slope: