Macro and micro analysis on coal-bearing soil slopes instability based on CFD-DEM coupling method.

ABSTRACT: By combining the discrete element method (DEM) with computational fluid dynamics (CFD), this study proposes a three-dimensional CFD-DEM fluid-solid coupling microscopic computational model for analyzing the micromechanisms of instability and failure in a coal-bearing soil slope during rainfall. The CFD-DEM fluid-solid coupling model indicated that the main failure mode of the coal-bearing soil slopes was rainwater washing, and the slope sliding surface was predicted as an approximately linear segment. The adaptability of this numerical method was verified by comparing its results with those of rain-washed slopes in an outdoor model test. Rainfall changed the microscopic parameters such as the force chain, coordination number, and porosity of the slope soil particles. The porosity of the sl

SUBMITTER: Zhang H 

PROVIDER: S-EPMC8448374 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature