Table 2 Micromechanical parameters used in PFC2D simulation.
From: Mechanical behavior of coal and rock with central hole defects under eccentric loading conditions
Mesoscopic parameters | Value |
|---|---|
The minimum particle radius Rmin/m | 2.1 × 10− 4 |
Ratio of maximum to minimum particle radius | 1.66 |
Particle density ρ/(kg/m3) | 2700 |
Friction coefficient between particles µ | 0.3 |
Elastic modulus between particles Ec/GPa | 1.4 |
Contact bonding stiffness ratio kn/ks | 1.8 |
Parallel bonding radius coefficient λ | 1 |
Elastic modulus of parallel bonding Ec/GPa | 1.4 |
Parallel bonding stiffness ratio \({\overline {k} _n}/{\overline {k} _s}\) | 1.8 |
porosity | 0.14 |
Parallel bonding tensile strength \({\overline {\sigma } _c}\)/MPa | 27 |
Parallel bonding cohesion \(\overline {c}\)/MPa | 33 |
Parallel bonding internal friction angle \(\overline {\varphi }\)/(°) | 30 |
