Stability Analysis of Coal-Measure Soil Slope Based on Discrete Element Method

Abstract

This paper uses the discrete element method to take the Pinglian high-speed coal-measure soil slope as the background, which uses PFC3D to calibrate the parameters, establishes the slope model, and analyzes the factors affecting the instability of the coal-measure soil slope from the granular meso-level. The results show that the discrete element method can be used to simulate the entire process of slope deformation and instability, and the sliding surface of the slope failure can be directly displayed through the displacement of the soil; the nature of the particles will affect the stability of the slope. The larger the particle size is, and the more irregular the composition of the soil particles are, the higher the safety factor of the slope is; the greater the slope is, the faster the safety factor decreases. When the slope is less than 1:0.75, the slope is relatively stable.