Energy Action Mechanism of Coal and Gas Outburst Induced by Rockburst

Table 3

Basic parameters of the model.

Parameter	Value
Elastic modulus of rock (GPa)	40
Poisson ratio of rock	0.25
Density of rock (kg·m^−3)	2300
Cohesion of rock (MPa)	20
Internal frictional angle of rock (°)	27
Elastic modulus of coal (GPa)	20
Poisson ratio of coal	0.4
Density of coal (kg·m^−3)	1400
Cohesion of coal (MPa)	2.5
Internal frictional angle of coal (°)	40