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首页> 外文会议>SME annual meeting exhibit;CMA national western mining conference >APPLICATION OF THREE-PHASE FOAM IN EXTINGUISHING SPONTANEOUS COMBUSTION OF COAL
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APPLICATION OF THREE-PHASE FOAM IN EXTINGUISHING SPONTANEOUS COMBUSTION OF COAL

机译：三相泡沫在煤自燃灭火中的应用

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摘要

In underground coal mining, one of the biggest challenges is spontaneous combustion, which will not only present safety hazards but result in reserve losses as a result of burnt coal. The released heat coupled with other combustible gases commonly encountered underground will significantly increase the risk of explosion. In this paper, three-phase foam as an environment-friendly fire fighting agent composed of nitrogen, water and fry ash is introduced. The nitrogen facilitates inertization of the fire zone; the water helps cool down the fire and the fly ash can closely cover the coal to isolate the oxygen. What's more, the fly ash and the foaming agent are good free radical absorption. The comprehensive merits mentioned above make three-phase foam quite effective in quenching spontaneous combustion. Experiments indicate that three-phase foam can significantly slow down the temperature rise of coal during oxidation. The comparison between slurry and three-phase foam shows that the latter one is capable of flowing upward in the porous media so as to extinguish the high-point fire and concealed fire.
机译：在地下煤矿开采中，最大的挑战之一是自燃，这不仅会带来安全隐患，还会因燃煤而导致储量损失。释放的热量与地下常见的其他可燃气体一起将大大增加爆炸的危险。本文介绍了一种由氮，水和粉煤灰组成的环保型三相泡沫灭火剂。氮气有助于火区的惰性化；水可以帮助降低火势，粉煤灰可以紧密覆盖煤层以隔离氧气。而且，粉煤灰和发泡剂是良好的自由基吸收剂。上面提到的综合优点使三相泡沫在淬灭自燃方面非常有效。实验表明，三相泡沫可显着减缓氧化过程中煤的温度升高。浆液和三相泡沫的比较表明，后者能够在多孔介质中向上流动，从而扑灭高点着火和隐蔽着火。

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