Research Article
Research and Optimization of Gas Extraction by Crossing-Seam Boreholes from Floor Roadway
Table 1
Relevant parameters for simulation of gas extraction.
| | Parameter name | Value | Parameter name | Value |
| | Initial gas pressure of coal seam (, MPa) | 1.0 | Geothermal temperature (, K) | 300 | | Gas adsorption volume constant (, m3/kg) | 0.0256 | Adsorption strain coefficient (, kg/m3) | 0.06 | | Gas adsorption pressure constant (, MPa) | 1.07 | Molar mass of gas (, g/Mol) | 16 | | Gas dynamic viscosity (, Pa·s) | | Molar gas constant (, J/(Mol·K) | 8.314 | | Hydrodynamic viscosity (, Pa·s) | | Standard temperature (, K) | 273.5 | | Gas desorption time (, d) | 1.21 | Standard atmospheric pressure (, kPa) | 101 | | Initial porosity of coal () | 0.035 | Coal density (, kg/m3) | 1410 | | Initial fracture degree of coal () | 0.012 | Initial permeability (, m2) | | | Slippage factor (, MPa) | 0.36 | Poisson’s ratio of coal () | 0.35 |
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