Investigating the Influences of Indentation Hardness and Brittleness of Rock-Like Material on Its Mechanical Crushing Behaviors

Table 4

The microparameters used in this PFC2D model.

Micro-parameters	A	B	C	D
Minimum disk diameter dmin (mm)	0.5	0.5	0.5	0.5
Maximum to minimum disk diameter ratio dmax/dmin	1.66	1.66	1.66	1.66
Young’s modulus of particle and bond (GPa)	3.11	3.65	3.37	3.87
Ratio of normal to shear stiffness of particle and bond  =	1.6	1.6	1.6	1.6
Element number, N	4	4	4	4
Particle friction coefficient	0.7	0.7	0.7	0.7
Diameter of particle (mm)	0.36	0.36	0.36	0.36
Parallel-bond tensile strength (MPa)	17.05	6.62	13.8	6.94
Parallel-bond cohesion strength (MPa)	8.2	12.55	7.55	11.16
Parallel-bond friction angle (°)	13	13	13	13