煤自燃多参数预报指标试验研究
Experiment Study on Multi Parameters Prediction Indexes of Coal Spontaneous Combustion
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摘要: 针对采用CO单一指标不能有效预测大佛寺煤层自燃的现状,通过模拟现场真实的漏风、蓄热条件,研究了大佛寺煤矿煤自燃多参数预报指标气体随煤温升高的变化规律。根据试验结果,确立了以φ(CO)/φ(CO2)、Graham指数、Δφ(CO)/Δφ(O2)为主的多参数预报指标体系。结果表明:当φ(CO)/φ(CO2)指数分别在0.2范围时,Graham指数在6时,分别对应大佛寺煤样的自燃氧化阶段、自燃氧化加速阶段和剧烈自燃氧化阶段。Abstract: 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.
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