Experiment Study on Multi Parameters Prediction Indexes of Coal Spontaneous Combustion

Due to the single index of CO could not effectively predict the seam spontaneous combustion in Dafosi Mine, with the simulation on a site real air leakag e and thermal storage condition, the paper studied the variation law of the multi parameters prediction indexes gas from the coal spontaneous combustion in Dafosi Min e with the coal temperature rising. According to the experiment results, a multi parameters prediction indexes system was determined mainly with φ( CO) /φ ( CO2), GI aham index and Oφ ( CO) /Oφ ( 02) . The results showed that when φ ( CO) /φ ( CO2) index below 0.1、0.1 ~0.2、over 0.2 and when the Graham index was below 3、 3 ~6、over 6, were individually corresponded to an oxidization stage of the spontaneous combustion, an oxidization acceleration stage of the spontaneous combustion and a serious oxidization stage of the spontaneous combustion for Dafosi Mine coal sample.