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为研究软弱夹层及边坡自身特征对边坡破坏过程的影响,基于拉张破坏原理,以内蒙古某露天煤矿南帮边坡为背景,建立拉张破坏有限元模型,研究了边坡在不同夹层埋深、夹层倾角、夹层厚度、边坡倾角4种工况下坡体内裂纹扩展过程和第一主应力演变过程。结果表明:随着夹层倾角、夹层厚度、边坡倾角增大,边坡内裂纹更容易与软弱夹层贯通;随着夹层埋深增大,边坡表土层虽更易发生破裂,但裂纹的扩展程度与夹层埋深呈现相反的规律。
In order to study the influence of soft interlayer and its own characteristics on slope failure process, based on the principle of tension failure, a finite element model of tension failure was established based on the southern slope of an open pit coal mine in Inner Mongolia. Depth of burial depth, interlayer dip, interlayer thickness and slope inclination, and the evolution process of the first principal stress. The results show that as the interlayer inclination, interlayer thickness and slope angle increase, the cracks in the slope are easier to penetrate with the weak interlayer. As the interlayer depth increases, the slope surface soil layer is more likely to crack, but the extent of crack propagation And the interlayer depth shows the opposite law.