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通过边坡工程地质测绘及节理调查分析,认为该矿扩帮区岩体结构面分布有明显规律,它服从本矿区域地质构造,用区域应力场可以得到明确的解释。 对该矿的端帮,即平面凹形边坡的稳定性用滑坡模型试验及有限元法进行了分析。同时,还初步探讨了一种新的计算方法—三维条柱法,用它可以计算复杂形态的边坡或滑体的稳定性,分析了滑体侧阻力效应及平面曲率对边坡稳定性影响。分析结果表明,平面曲率半径与边坡稳定系数的关系为F=a+b/(R_0/H_0),当R_0/H_0<2,而且滑面一般不通过坡脚,而是在其上部。
Through slope engineering geological surveying and joint investigation and analysis, it is believed that the distribution of rock body structure in the expansion zone of the mine has obvious rules. It obeys the regional geological structure of the mine and can be clearly explained by the regional stress field. The end of the mine, that is, the stability of the plane concave slope was analyzed by landslide model test and finite element method. At the same time, a new calculation method—three-dimensional bar column method—is used to calculate the stability of complex slopes or sliding bodies, and the effect of sliding side drag effect and plane curvature on slope stability is analyzed. . The analysis results show that the relationship between the radius of curvature of the plane and the slope stability coefficient is F=a+b/(R_0/H_0), when R_0/H_0<2, and the slip surface does not generally pass through the foot of the slope, but is in the upper part.