Ventilation and cooling of coal mining face based on CFD model optimization

To solve the problem of high temperatures at the coal mining workings site. The CFD model of the coal mining face was optimized by importing user-defined functions (UDF) in ANSYS-Fluent and simulating the gas-liquid two-phase flow. By analyzing different ventilation variables, an air volume of 36.81 m3/s and an air temperature of 298 K were determined as the optimum ventilation parameters. Based on dynamic multi-field coupling analysis, a spray cooling system was proposed. The influence of water temperature, height, different zones, and spray group spacing on the cooling effect is analyzed by numerical simulation. The results show that the best effect is achieved when the water temperature is 286 K and the group spacing is 10 m. At this point, the peak temperature of a single group on the pavement side is 0.5–1 ℃ lower than the conventional temperature. The maximum temperature was 27 ℃, and the minimum temperature was 24.4 ℃. The effect of the system on cooling is even more pronounced during summer ventilation.