FE Analysis of Rock with Hydraulic-Mechanical Coupling Based on Continuum Damage Evolution

Table 1

Physical parameters of model.

Parameter	Value
Young’s modulus, E (GPa)	16.32
Poisson’s ratio,	0.33
Biot coefficient,	0.79
Drucker-Prager constant,	0.29
Gas density, (kg/m^3)	0.717
Damage factor,	1.0
Permeability damage coefficient,	0.1
Initial porosity,	0.019
Initial permeability, (md)	1.9E2
Motion viscosity coefficient, (Pa⋅s)	1.84E − 5
Compressive strength, (MPa)	103
Tensile strength, (MPa)	7.5