巨野矿区煤自燃特性及动力学研究

Characteristics of coal spontaneous combustion and kinetics in Juye mining area

针对巨野矿区3号煤层自然发火严重的现状，选择巨野矿区3上和3下两煤层煤样，采用煤的物性参数测试、热重分析、傅里叶红外光谱测试等实验方法，进行巨野矿区3煤层的自燃特性及动力学参数实验研究。结果表明，巨野矿区煤属于Ⅱ类自燃煤，煤的孔隙主要以大孔和中孔为主；煤在失水失重与吸氧增重阶段的活化能分别为94.49~123.61kJ/mol和231.50~241.08kJ/mol；煤分子中含有大量的羟基、甲基、亚甲基等活性官能团，这些活性官能团是导致巨野矿区煤自燃的关键化学结构。

Considering the situation that the spontaneous combustion of coal seam No.3 in Juye mining area is serious,coal samples from upper seam 3 and lower seams 3 were selected as research object. In this paper, coal physical parameters test, thermogravimetric analysis and Fourier infrared spectrum were used to conduct experimental study on the characteristics of spontaneous combustion and kinetic parameters of seam 3 in Juye mining area. Experimental results show that coal of Juye mining area belongs to the class Ⅱof spontaneous combustion coal, and the coal pores are mainly macropore and mesopore; Activation energy of coal is 94~123 kJ/mol in the stage of weight loss induced by dehydration, 230~240 kJ/mol in the stage of weight gain induced by oxyge uptake.Coal molecule contains a large number of active functional groups, including hydroxyl, methyl and methylene,which are the key chemical structure leading to spontaneous combustion of coal in Juye mining area.