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为了探测出井下采空区煤自燃位置及圈划火区范围,分析了采空区发火机理和氡气性质,表明煤自燃温度升高,伴随着氡气的析出和垂直向上转移,在地面集聚氡气。基于此,通过探测地面氡气含量,即可间接地检测到井下采空区发火的大致范围或区域。结合井下巷道布置系统图,确定了余吾煤矿N12区域的发火区域范围。
In order to detect the coal spontaneous combustion location and the range of the circle fire area, the spontaneous combustion mechanism and the properties of radon were analyzed. It showed that the spontaneous combustion temperature of coal increased with the precipitation of radon and vertical upward transfer, Radon gas. Based on this, by detecting ground radon content, indirect detection of the gross area or area of downhole gob burned. Combined with the system diagram of underground tunnel layout, the ignition zone of N12 area in YuWu coal mine is determined.