Study on Physical and Contact Parameters of Limestone by DEM

Abstract

Based on discrete element theory, a discrete element model was built to simulate the motion of single particle or particles, which provides some feasible and effective methods for determining the physical parameters and contact parameters of the discrete element model, and improves the authenticity and reliability of the material discrete element simulation. This paper provides some methods for obtaining physical parameters and mutual contact parameters. The shear modulus of limestone rock was obtained by uniaxial compression test. Using limestone raw material, the collision recovery coefficient was measured in a drop test using a high-speed camera and the static friction coefficient was obtained in a sliding plate test. The physical parameters and the contact parameters of the discrete element model of limestone were determined by measuring the stacking angle of limestone particles.