Abstract
Based on the discrete element numerical simulation, the change rules of safety factor and failure modes of slope influenced by parameters of rock mass structural plane is studied. Based on the principle of variance analysis of orthogonal experiment, significance of the rock structural plane parameters to the stability of slope is studied. It is shown that slope safety factor is linear increase in a certain range with the increase of the strength of the rock mass structural plane, and the failure modes shift gradually from the bedding sliding failure modes to the sliding-bending failure modes. Extent of variation of safety factors changes very little with the increasing of the normal and shear stiffness and spacing of rock structural plane, and the slope failure modes are mainly sliding failure modes. Slope safety factor firstly decreases and then increases and finally decreases with the increase of the rock structural plane dip angle, and failure modes shift from shearing slip failure modes to shearing slip and buckling failure modes and finally to the tilting failure modes. The impact of the rock structural plane cohesion to the slope stability is the greatest, and the stiffness is the least.
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