Research Article
Mathematical Model and Numerical Simulation of Coalbed Methane Migration Considering the Adsorption Expansion Effect
Table 3
Modeling parameters for the numerical simulation.
| | Parameter name | Numerical value |
| | Internal friction angle of gas-containing coal rock, φ (°) | 32 | | Young's modulus of gas-containing coal rock, E (MPa) | 2183.1 | | Poisson ratio, | 0.3274 | | Gas power viscosity, μ (Pa.s) | 1.34 10−5 | | Coal body weight, ϒ (g/cm3) | 1.4 | | Single axis strength, (MPa) | 8.2 | | Porosity, n | 6.07% | | Volume modulus of gas-containing coal rock, (MPa) | 170 | | Gas density, ?0 (kg/m3) | 0.714 | | Adsorption constant a, (m3/kg) | 24.15 | | Adsorption constant b, (MPa−1) | 1.32 |
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