Table 10 Contact parameters between particles.
From: Research on coal rock parameter calibration based on discrete element method
Types of particles in contact | Recovery coefficient | Static friction coefficient | Dynamic friction coefficient |
|---|---|---|---|
Coal 1and Coal 1 | 0.58 | 0.62 | 0.082 |
Coal 2 and Coal 2 | 0.65 | 0.59 | 0.151 |
Coal 1 and gangue 1 | 0.4 | 0.5 | 0.101 |
Coal 1 and gangue 2 | 0.41 | 0.46 | 0.128 |
Coal 1 and gangue 3 | 0.54 | 0.48 | 0.087 |
Coal 1 and roof | 0.42 | 0.44 | 0.134 |
Gangue 1and gangue 1 | 0.61 | 0.45 | 0.145 |
Gangue 2 and gangue 2 | 0.47 | 0.50 | 0.113 |
Gangue 3 and gangue 3 | 0.61 | 0.47 | 0.122 |
Roof and roof | 0.45 | 0.48 | 0.109 |
