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本文研究了陕北神府矿区大柳塔井田2~(-2)煤层中煤样的显微组成,岩石类型及煤的300℃前氧化放热与燃点的关系。实验中发现,丝质组以及丝炭氧化放热量最大而燃点最低,镜质组以及镜煤氧化放热量最小,而燃点最高。随着各煤岩类型中丝质组含量的增高,其氧化放热量增加,燃点降低。因此丝质组及丝炭是最易自燃的显微组分和煤岩类型,并对其易自燃的原因进行了探讨。
In this paper, the microstructure and rock types of coal samples in 2 ~ (-2) coal seam of Daliuta Minefield in Shenfu Mining Area of northern Shaanxi Province and their relationship with the ignition temperature of 300 ℃ before oxidation were studied. The experiment found that the silk group and the filament of the most exothermic oxidation and burning the lowest vitrinite and mirror coal, the smallest amount of exothermic oxidation, and the highest ignition. With the increase of the content of siliceous group in each type of coal and rock, the exothermic heat of oxidation increased and the ignition point decreased. Therefore, the siliceous group and silk are the most easily ignitable microscopic components and coal rock types, and the causes of spontaneous combustion are discussed.