Research Article

Mechanism of Fire Prevention with Liquid Carbon Dioxide and Application of Long-Distance Pressure-Holding Transportation Technology Based on Shallow Buried and Near-Horizontal Goaf Geological Conditions

Table 5

Boundary control conditions of the model.

TypeNumerical valueTemperatureHydraulic diameterTurbulence intensity

Ventilation inletInlet velocity0.2, 0.5, 0.8, 1.0 m/s300 K4.53 m15%
Ventilation outletFree overflow0.85
CO2 inletInlet mass flow9, 18, 27 t/h233 K0.6 m10%