Influence of the Preexisting Fracture Network on the Mechanical Properties of Rock Mass and the Secondary Crack Propagation

Table 1

The values of parameters used in the calculation.

Elastic modular (GPa)	Poisson’s ratio	Cohesion (MPa)	The angle of internal friction (°)	Strain softening
				Plastic shear strain	0	0.02	0.05	0.07
10.5	0.21	5.7	32	Cohesion (MPa)	5.7	5.1	3.3	0.5
				The angle of internal friction (°)	32	28	15	12