Study on Activation Behavior of Complex Fracture Network in Weak-Planar Rock

Table 2

Main parameters of material cohesive element in model II.

Parameters	Material
	Matrix cohesive unit	The weak plane I corresponds to the cohesive unit	The weak plane II corresponds to the cohesive unit
Tensile strength (MPa)	5	1	0.5
Shear strength (MPa)	20	4	2
Tensile critical fracture energy (J/m^2)	100	20	10
Shear critical fracture energy (J/m^2)	4500	900	450