Simulation of the Effect of Coal Microstructures on the Macroscopic Mechanical Behavior

Table 2

The mechanical properties of the different materials used in the simulation.

Property	Young’s modulus (MPa)	Poisson’s ratio	Cohesion			Friction angle (°)
			Original value (MPa)	Softening rate (%)	Residual value (MPa)
Coal	4000	0.33	1.13	0.2	0.113	40.6
Mineral	26000	0.18	6.45	—	—	38.5