Analysis on Thermal Environment and Selection of Airflow Cooling Methods in Coal Mining Face

According to the complicated thermal disaster factors affected to the coal mining face and the irational ventilation supply phenomenon, the analysis ont he thermal source factors of the coal mining face was applied to calculate the heat releasing value of the thermal source and establish the heat-exchange model of the air flow passing through the coal mining face.With the control of the ventilation temperature at the exit of the mining block within the allowed limit (no more than 26 °C) 0 f the regulation, the ventilation temperature and the optimum ventilation quantity at the entrance to the coal mining face was calculated.When the ventilation cooling cou Id not meet the requirements, a mechanical cooling method shall be applied.In order to have the optimum mechanical cooling effect, the advantages and disadvantages of two cooling methods were analyzed.The results showed that a centralized cooling method could be applied to the coal mining face with a mining depth not so high an d the rock temperature not high and a sectional even cooling method could be applied to the coal mining face with a high mining depth and a high rock temperature.