| Value | Item | Value | |
|---|---|---|---|
| The top depth of the coal mine/m | 400 | The scale of the model | 85m*95m*48m |
| Average thickness of the coal stratum/m | 48 | Initial pressure/ kPa | 750 |
| Average porosity | 0.04 | Initial methane content | 11.5m3/t |
| Average Permeability of matrix/(10-3μm2) | 0.05 | Density of coal rock/(kg/m3) | 1300 |
| Average Permeability of fracture/(10-3μm2) | 0.5 | Initial stress/kPa | 810 |
| Biot's constants | 1.0 | fracture interval/m | 40 |