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为研究浅埋无烟煤的发火原因,首先分析浅埋煤的漏风原因及漏风模型,然后采集现场煤样,采用绝热氧化和傅里叶红外光谱分析法得出煤样的自燃性质,最后根据分析结果,结合北京市门头沟区百崖子沟山坡冒烟的实际情况,探讨煤火的发生原因。分析表明:该区域采掘中遗煤量大,浅埋煤具备煤火发生和发展的漏风通道,气候条件加剧漏风,且该煤样由于受地质构造影响或自然条件作用自燃倾向较高,符合煤层自燃的条件,基本可认定这次浅埋煤发火为煤自燃引发,但也不排除盗采过程中人为造成的可能。
In order to study the cause of ignition of shallow buried anthracite, firstly, the cause of air leakage and the air leakage model of shallow coal were analyzed. Then the coal samples were collected and the spontaneous combustion properties of coal samples were obtained by adiabatic oxidation and Fourier transform infrared spectroscopy. Finally, , Combined with the actual situation of Baiyazizou hillside slope in Mentougou District of Beijing to discuss the causes of coal fire. The analysis shows that: the large amount of coal left in the excavation, the shallow coal with the occurrence of coal fire and the development of air leakage channel, weather conditions intensified air leakage, and the coal sample due to geological structure or spontaneous tendency of natural conditions tend to be higher, in line with coal Spontaneous combustion conditions, the basic can be found that the shallow spontaneous combustion of coal spontaneous combustion, but does not rule out the possibility of man-made theft.