Abstract
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 the fundamental data about temperature distribution downwind of the fire, velocity and pressure variation of the air which are indispensable for taking effective counter measures against the underground fire. 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 distance from the fire. The coefficients of air temperature decreasing with distance, as defined by Eq.(2), ranged from 0.007 to 0.01 (1/m) in these experiments. The value increases as the air velocity decreases although the differences involved are relatively small.
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