A Statistical Damage Constitutive Model for Geomaterials under Plane-Strain Biaxial Stress State

Table 1

Mechanical and physical parameters of specimens.

Parameters	Symbol/material	Coal	Synthetic material	Units
		value	value
Elastic modulus		1.070	0.115
Uniaxial compression strength		18.76	2.00
Poisson’s ratio		0.30	0.32	N/A
Cohesive strength		4.5	0.4
Internal friction angle		25	45
Residual cohesive strength		~0.30	~0.15
Internal friction angle		~25	~45