Impact of Depressurizing Boreholes on Energy Dissipation in Deep Roadway

Table 1

Calibrated parameters of the rock masses.

Prepeak	Elasticity modulus (GPa)	Poisson ratio	Cohesion (MPa)	Internal friction angle (°)	Tensile strength (MPa)
	2.09	0.26	3.61	30.36	0.4
Postpeak	Plastic strain	0.01	0.02	0.5	1
	Cohesion (MPa)	2.61	1.60	0.32	0.32
	Internal friction angle (°)	30.72	24.64	23.14	23.14