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通过对淮南某矿121101工作面采空区的观测,得到了采空区各种气体的分布情况与采空区气体成分及其体积分数随工作面推进所发生的动态变化情况,以氧气浓度法及以观测的CO体积分数变化作参考,并利用MIN-MAX优化理论划分出采空区“三带”的范围,结合121101工作面实际情况和确定的“三带”范围,相应地提出了三相泡沫防灭火措施,可以有效地防止遗煤自燃。
Through the observation of the gob of 121101 working face of a mine in Huainan, the distribution of various gases in goaf and the dynamic changes of gas composition and volume fraction in goaf with the advancement of working face were obtained. The oxygen concentration And taking the change of observed CO volume fraction as a reference, the range of the “three zones” of the goaf is divided by the MIN-MAX optimization theory. Based on the actual situation of the 121101 face and the determined “three zones” Proposed a three-phase foam fire fighting and extinguishing measures, can effectively prevent coal spontaneous combustion.