Correlation Analysis of Macroscopic and Microscopic Parameters of Coal Measure Soil Based on Discrete Element Method

Table 2

Microscopic parameters used in the discrete element method simulations.

Particle density	2230 kg/m^3
Porosity	0.32
Model particle diameter	20 mm∼200 mm
Friction coefficient	0.3
Normal stiffness of particle contact	1 × 10^9 N/m
Tangential stiffness of particle contact	1 × 10^7 N/m