为了深入研究侧向正交开采扰动下边坡的变形演变机理与破坏模式，以山区井采扰动边坡为背景，结合现场勘查，运用FLAC^3D数值模拟软件，构建采动边坡三维地质模型，分析边坡在工作面不同推进位置下的应力场和位移场变化规律；结合GNSS监测数据分析，提出了侧向正交开采扰动边坡的3个变形演变阶段和破坏模式。研究表明：侧向正交开采扰动下，边坡临空面集中应力逐渐释放，地表先于下部岩体产生变形扰动，坡顶产生沿坡走向上的非一致性剪切变形，发生非连续性破坏；当工作面与边坡水平距离50～55 m时，变形量发生突变，边坡上缘岩体发生塑性变形，坡顶出现顺坡走向断续延伸的张拉裂缝，减弱了地表受开采扰动影响的范围；当工作面推过边坡剖面，两者水平距离处于120～170 m之外时，进入变形衰退阶段，变形速率放缓，此时边坡在垂直方向上的变形增量大于水平变形增量，裂缝上覆岩体产生指向临空面的挤压作用，裂缝逐渐闭合；边坡总体呈现非一致性剪切—拉裂—闭合的变形破坏模式。

In order to further study the deformation evolution mechanism and failure mode of slope under lateral orthogonal mining disturbance, based on the background of mining disturbance slope in mountainous area, combined with field investigation, FLAC^3D numerical simulation software was used to construct a three-dimensional geological model of mining slope, and the variation law of stress field and displacement field of slope at different advancing positions of working face was analyzed. Combined with the analysis of GNSS monitoring data, three deformation evolution stages and failure modes of the disturbed slope of lateral orthogonal mining are proposed. The results show that under the disturbance of lateral orthogonal mining, the concentrated stress of the free surface of the slope is gradually released, the deformation disturbance of the surface is generated before the lower rock mass, and the non-uniform shear deformation along the slope direction is generated at the top of the slope, and the non-continuous failure occurs. When the horizontal distance between the working face and the slope is 50-55 m, the deformation amount mutates, the rock mass at the upper edge of the slope deforms plastically, and the tensile cracks extending intermittently along the slope trend appear on the top of the slope, which weakens the range of the surface affected by mining disturbance. When the working face passes through the slope section and the horizontal distance between the two is beyond 120-170 m, it enters the stage of deformation recession and the deformation rate slows down. At this time, the deformation increment of the slope in the vertical direction is greater than the horizontal deformation increment. The overlying rock mass of the crack produces the extrusion effect pointing to the free surface, and the crack gradually closes; the slope generally presents a non-uniform shear-cracking-closing deformation and failure mode.