Abstract: Spontaneous combustion of residual coal likely occurs in the mined-out area, storage bunker, closed zone, etc, where the oxygen concentration is lower than that in the air, so the experiment of coal oxidation at low temperature was made to reveal the correlation between oxygen concentration and dynamic parameters of Jurassic coal from Yima mine oxidation at low temperature. The experiment revealed that slow oxidation regenerative period gradually extended with the oxygen concentration of the supplying gas reducing. But in the rapid oxidation stage, the apparent activation energy is hardly affected by oxygen concentration, and that the oxygen concentration 11.7% can be used as reference upper threshold in the process of Yima mine fire prevention.

Key words: oxygen concentration, low-temperature oxidation, apparent activation energy, oxygen consumption