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三相泡沫防治煤炭自燃的特性及應用

Characteristics and application of three-phase foam in spontaneous combustion of coal

  • 摘要: 介紹了三相泡沫的防滅火特征,分析了三相泡沫的覆蓋效果和阻化特性,實驗研究了三相泡沫撲滅多孔介質中的高位火源.結果表明,靠大流量的三相泡沫不斷滲透、堆積和擴散,能將整個采空區完全覆蓋,可防治采空區內任何位置的火源.根據礦井采空區及三相泡沫的特性推導出三相泡沫的擴散距離、注漿管出口離工作面的距離及連續注三相泡沫的時間.通過三相泡沫在大興煤礦N2 703綜放工作面的實際應用,提出了向采空區預埋管注三相泡沫的方案,并成功地防治了該面的煤炭自燃.

     

    Abstract: The characteristics of three-phase foam in mine fire control were introduced, its covering and inhibition were analyzed, and experiments on extinguishing the top fire in a porous medium were carried out. The results show that three-phase foam can cover the whole goaf and prevent everywhere fire by pervasion and accumulation. According to the characteristics of goaf and three-phase foam, technical parameters, such as diffused distance of three-phase foam, length between working face and pipe bottom and durative time for spontaneous combustion of coal, were deduced. Based on them, three-phase foam was applied in the workface N2 703 of Daxing coal mine in China, and laying pipes in advance in goaf was carried out. The effect of application shows that three-phase foam can successfully prevent spontaneous combustion of coal in the working face.

     

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