In order to evaluate the spontaneous combustion characteristics of No.3 coal seam in 3502 fully mechanized mining face of Huoerxinhe Coal Mine in Shanxi Province, the concentration evolution characteristics of CO, CO2, CH4, C2H4, C2H6 and O2 in the pyrolysis process of coal samples were analyzed by combining the laboratory coal spontaneous combustion experiment and the field marker gas test. Based on the theoretical model of oxidation kinetics, the evaluation index system of spontaneous combustion tendency of coal seam was established and quantitatively evaluated. The experimental results show that the CO and C2H4 produced in the pyrolysis process of 3502 working face coal samples show significant temperature response characteristics, which can be used as the characteristic index gas of coal spontaneous combustion process. CO2, CH4 and C2H6 have auxiliary identification function and can be used as composite early warning parameters. The quantitative index of spontaneous combustion tendency of No.3 coal seam is 691.3, which belongs to spontaneous combustion coal seam.
刘欣欣. 基于标志性气体浓度演化特征的煤层自燃倾向性分析[J]. 煤炭与化工, 2026, 49(9): 127-130.
Liu Xinxin. Analysis of spontaneous combustion tendency of coal seam based on evolution characteristics of symbolic gas concentration. CCI, 2026, 49(9): 127-130.
