Stability Evaluation on Surrounding Rocks of Underground Powerhouse Based on Microseismic Monitoring

Table 1

Mechanical parameters of rock mass in the underground powerhouse.

Rock mass	Deformation modulus/GPa	Poisson’s ratio	Cohesion/MPa	Friction coefficient	Tensile strength/MPa	Unit weight/(kN·m^−3)
	25	0.25	15	1.2	5.5	2800
Faults	4	0.35	0.5	0.45	0.0	2000