Table 1 Physical and mechanical parameters of coal and rock.
From: Research on coal rock parameter calibration based on discrete element method
Material | Elastic modulus (MPa) | Density (kg/m3) | Poisson’s ratio \(\mu\) | Uniaxial compressive strength (MPa) | consistent coefficient f |
|---|---|---|---|---|---|
Coal 1 | 2010 | 1280 | 0.28 | 12 | 1.4 |
Coal 2 | 5240 | 1319 | 0.31 | 23.79 | 2.38 |
Gangue 1 | 3620 | 2460 | 0.24 | 30 | 3.5 |
Gangue 2 | 12,100 | 2630 | 0.23 | 42 | 5.1 |
Gangue 3 | 18,300 | 2610 | 0.21 | 52 | 6.8 |
Roof | 21,500 | 2600 | 0.19 | 71 | 8.4 |
