There exists large seasonal difference in entrance airflow temperature in mine ventilation. This paper tested temperature variation in roadway ventilation in different seasons, and established a mathematical heat transfer model of the surrounding rock and airflow to numerically simulate their heat transfer characteristics. The results show that the airflow exchanges heat with the surrounding rock along its path in the roadway, leading to continuous increase of the airflow temperature, which increases slowly in the working face. The numerical simulation results are consistent with the measured results. The variation of airflow temperature is significantly affected by seasonal difference, and the lower the airflow temperature at the entrance is, the larger the temperature change is under the same airflow distance in the roadway. This study reveals the heat transfer characteristics of mine ventilation and may provide references for ventilation cooling technologies.

heat transfer  /  airflow temperature  /  seasonal ventilation  /  deep mine