Research of The Influence of The Particle Geometry on The Accumulation of Repose Angle Based on DEM

Particle packing is a common phenomenon in the field of industrial and agricultural, Stacking angle of repose reflects the macroscopic properties of the combined effects of granular group.In order to study the geometry of the particles impact angle of repose particle packing, in this paper, the rock particles as the research object, using discrete element software EDEM respectively simulated by a single ball, double ball, four and eight ball composed of four different geometry of rock particles in the bottomless cylinder lagged accumulation phenomenon, Combined with image processing software Matlab image of stacked linear fit contour, In non-experimental conditions measured angle of repose rock.And compared with the measured angle of repose with the actual accumulation experiments, the error is very small, and the reliability of this method is verified.The results show that: in the same condition, the different geometric shapes of the rock particles of the natural accumulation of the repose angle with the complexity of the geometric shape of the particles gradually increasing trend and reach a certain limit angle.