Research Article
Numerical Simulation of Parameters Optimization for Goaf Gas Boreholes
Table 2
Boundary conditions and parameters.
| | Location/name | Boundary conditions | Parameters values |
| | Tape roadway | Velocity-inlet | 2.6 m/s | | Return air roadway | Velocity-inlet | 1.1 m/s | | Inlet air roadway | Velocity-inlet | 1.6 m/s | | Gas emissions roadway | Out-flow | / | | Intake roadway | O2 respectively | 21% | | Intake roadway | CH4 respectively | 0% | | Working face solid wall | Nonslip boundary | | | Goaf solid wall | Nonslip boundary | | | Juncture of working face and goaf | Interior boundary | / | | Permeability of goaf | “O” distribution | / |
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