浅埋无烟煤发火原因分析

Ignition Reason Analysis of Shallow Anthracite Coal Seam

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。

To search the fire reason of shallow anthracite coal seam, the air leakage reason and air leak- age model of the shallow coal seam were analyzed first, then adiabatic oxidation method and Fourier trans- form infrared spectroscopy method were used to analyze the self-ignition nature of coal. Finally, the igni- tion reason was discussed on the basis of smoking conditions of the Baiyazi ditch hillside of Mentougou dis- trict in Beijing and analysis results. It showed that there is a large quantity of residual coal in the region during the excavation process and the shallow coal seam has air leakage channels for coal fire occurrence and development, air leakage is exacerbated by climate conditions, and this coal sample has high sponta- neous combustion tendency due to the impact of geological structures or natural conditions. It can be con- sidered that the shallow coal fire is accused by coal self-ignition, but human factors related to stealing min- ing can not be excluded.