易自燃煤层采空区瓦斯与氧气耦合致灾效应分析

Analysis on Disaster Effect of Gas and Oxygen Coupling in the Goaf of Spontaneous Combustion Coal Seam

摘要: 针对“U”型通风易自然煤层开采条件下,采空区漏风使氧气与瓦斯混合具有爆炸危险性的问题,通过在采空区埋入甲烷及温度传感器进行观测,利用Fluent方法对采空区瓦斯分布规律进行模拟计算,分析瓦斯在自然发火危险区域中燃烧的可能性,对采空区内瓦斯与氧气相互达到爆炸危险的耦合区域进行危险判定分析,为现场瓦斯治理提供依据。
- 易燃煤层 /
- 采空区 /
- 瓦斯耦合 /
- 爆炸危险 /
- 自然发火区
Abstract: Under the mining condition of U-type ventilation and spontaneous combustion coal seam, the air leakage in goaf may create an environment with explosion hazard due to the mixing of oxygen and gas. Through the observation by embedding methane and temperature sensor in the goaf, the Fluent method is used to perform analog computation on gas distribution regularities of goaf, and the possibility of gas combustion in the dangerous area of spontaneous ignition is analyzed. Meanwhile, the hazard judgment and analysis is conducted on the explosion coupling area resulting from the interaction of gas and oxygen in the goaf, which provides the basis for field gas control.
- combustible coal seam /
- goaf /
- gas coupling /
- explosion hazard /
- spontaneous ignition area

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