Table 6 Microscopic parameters of discrete particle elements.
Parameters | Description | Rock mass type | ||
|---|---|---|---|---|
Granite | Slate | Sandstone | ||
ball_kn | Ball normal stiffness (Pa) | 24.6e9 | 20.5e9 | 22.7e9 |
ball_ks | Ball shear stiffness (Pa) | 24.6e9 | 20.5e9 | 22.7e9 |
ball_fric | Ball friction coefficient | 0.57 | 0.51 | 0.4 |
ball radius | Ball radius (m) | 0.2–0.4 | 0.2–0.4 | 0.2–0.4 |
pb_krat | Parallel bond normal/shear stiffness ratio | 1.0 | 1.0 | 1.0 |
pb_coh | Parallel bond cohesive strength (Pa) | 3e6 | 2.8e6 | 2.1e6 |
pb_ten | Parallel bond tense strength (Pa) | 1.5e6 | 1.2e6 | 1.0e6 |
pb_rmul | Parallel bond radius multiplier | 0.98 | 0.97 | 0.98 |
