为探究火成岩侵蚀对煤自燃特性及结构的影响规律，以陕西、辽宁区域两煤矿同工作面原生煤及火成岩侵蚀煤为研究对象，采用程序升温试验、红外光谱分析、低温氮气吸附和压汞实验，分别从宏观和微观角度对煤的氧化特性、自燃极限参数、活性官能团含量以及孔隙结构特征进行分析。结果表明：火成岩侵蚀增大煤的自燃风险，会提升煤体内部的气体流通性，火成岩侵蚀煤体具有更高的氧化活性；此外，火成岩侵蚀改变煤层赋存条件，增大煤层开采难度，提高采空区内漏风强度，延长采空区“氧化升温带”遗煤的氧化时间，从外部影响因素层面提升煤炭的自燃风险；火成岩侵蚀改变煤自身结构和煤自燃外部环境因素，加剧了侵蚀煤层的自燃风险。

In order to explore the influence law of igneous rock erosion on coal spontaneous combustion characteristics and structure, taking primary coal and igneous rock eroded coal in the same coal face of Shanxi Mine and Liaoning Mine as the samples, the oxidation characteristics, the limit parameters of the spontaneous combustion, the content of the active functional group and pore structure characteristics of coal were analyzed from macro and micro perspectives by temperature programmed test, FT-IR experiment, low temperature nitrogen adsorption experiment and mercury injection experiment respectively. The results of temperature programmed test showed that igneous rock erosion increased the spontaneous combustion risk of coal, igneous rock erosion could enhance the gas circulation inside the coal body, which is conducive to the oxidation reaction between oxygen and active groups inside the coal body, and the coal body of the igneous erosion had higher oxidizing activity. In addition, igneous rock erosion altered the occurrence conditions of coal seams, increased the difficulty of coal seams mining and the intensity of wind leakage in the mining airspace, prolonged the oxidation time of the residual coal in the “oxidized heating zone” in goaf, thus increasing the risk of spontaneous combustion of coal from the level of external influencing factors. The erosion of igneous rock changes the structure of coal itself and the external environmental factors of coal spontaneous combustion, which intensifies the spontaneous combustion risk of the eroded coal seam.