Research Article
Network Design Mode of In-Seam Gas Extraction Parameters Using Mathematical Modelling—Take Tangan Colliery as an Example
Table 1
Main parameters of gas extraction simulation.
| | Parameter | Value |
| | Young’s modulus of coal (, MPa) | 3950 | | Young’s modulus of coal skeleton (, MPa) | 11850 | | Poisson’s ratio of coal (, —) | 0.4 | | Density of coal (, kg/m3) | 1390 | | Initial porosity of coal seam (, —) | 0.0137 | | Initial permeability of coal seam (, m2) | | | Dynamic viscosity coefficient of gas (, ) | | | Universal gas constants (, )) | 8.314 | | Gas molar mass (, g/mol) | 16 | | Coal temperature (, K) | 300 | | CH4 Langmuir pressure constant (, MPa) | 0.96 | | CH4 Langmuir volume constant (, m3/kg) | 0.035 | | CH4 Langmuir volumetric strain constant (, —) | 0.02295 | | Atmospheric pressure under standard conditions (, MPa) | 0.1 |
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