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以林南仓矿11~#煤层为研究对象,通过程序升温实验确定了煤自燃加速氧化阶段(100~200℃)各指标气体浓度与温度的对应关系并分析了其变化规律,利用灰色B型关联度分析法对指标气体进行优选筛选,并计算了各指标气与煤自燃氧化温度的关联程度,确定了各指标气体的可信度。结果表明:在加速氧化阶段,林南仓矿11~#煤层的C_3H_8/C_2H_6与温度的关联度最大,其次是C_2H_4/C_2H_6,因此选择C_3H_8/C_2H_6为最优指标气体,C_2H_4/C_2H_6为辅助指标气体。该研究结果对提高煤层自燃预报的准确性具有重要意义。
Taking 11 ~ # coal seam of Linnan Cangcui as the research object, the corresponding relationship between gas concentration and temperature of each indicator during the spontaneous combustion stage of spontaneous combustion (100 ~ 200 ℃) was determined by temperature programmed experiment and its variation was analyzed. The gray B-type correlation Analytical method for the selection of index gas optimization, and calculate the correlation between each index gas and coal spontaneous combustion oxidation temperature, to determine the credibility of each indicator gas. The results show that C_3H_8 / C_2H_6 in coal seam 11 ~ # seam of Linnan Cangling has the highest degree of correlation with temperature, followed by C_2H_4 / C_2H_6 in the accelerated oxidation stage. Therefore, C_3H_8 / C_2H_6 is the best indicator gas and C_2H_4 / C_2H_6 is the auxiliary indicator gas. The results of this study are of great significance to improve the accuracy of coal spontaneous combustion prediction.