Numerical Investigation and Analysis of Intermediate Principal Stress Effects on Rock Failure Behaviors

Table 1

Mesoscopic parameters of the PFC model.

Mesoscopic parameters	Values
Ball-ball contact modulus (GPa)	46.06
Ball stiffness ratio	1.15
Ball friction coefficient	0.25
Parallel-bond modulus (GPa)	46.06
Parallel-bond stiffness ratio	1.15
Parallel-bond normal strength, mean (MPa)	178.11
Parallel-bond shear strength, mean (MPa)	187.52
Parallel-bond normal strength, std. dev. (MPa)	51.77
Parallel-bond shear strength, std. dev. (MPa)	54.50