Changes in the temperature and velocity of ventilation air during mine fires. Studies on the effect of mine fire on underground ventilation system

The present paper describes the results of mine fire experiments conducted in an actual size gallery. The main purpose of the experiments was to obtain fundamental data on the temperature distribution downwind of the fire as well as on the velocity and pressure variations of the air. The air velocity decreases as the fire burns. The higher the temperature of the fire zone and the initial air velocity, the greater is the decrease in the velocity. The air temperatures decreased nearly exponentially with the distance from the fire.