The three‐phase foam consisted of solid, liquid and gas is regarded as a highly effective measure for the underground mine fire prevention. In this study, the three‐phase foam technology is introduced and a visualization platform is established to exhibit the foam flow in a physical goaf. The diffusion rule and extinguishing performance for three‐phase foam are researched. Test results show that the three‐phase foam has a superior heat resistance than expansion foam in the top goaf. The coal heating rate is postponed after the three‐phase foam processing and the active functional groups are suppressed effectively. Increasing the foam expansion ratio is adverse to the three‐phase foam stability. The field application of three‐phase foam was evaluated via the practical extinguishment effect. The marked reduction in the sealed zone temperature and CO concentration proved that the proposed three‐phase foam technology was effective on controlling the concealed goaf fire.

中文翻译：

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一种用于地下灭火的贵金属灭火剂的研究

由固体，液体和气体组成的三相泡沫被认为是预防地下矿井火灾的有效措施。在这项研究中，引入了三相泡沫技术，并建立了可视化平台来显示物理采空区中的泡沫流动。研究了三相泡沫的扩散规律和灭火性能。测试结果表明，三相泡沫比顶部采空区的膨胀泡沫具有更好的耐热性。三相泡沫处理后，煤的加热速率被推迟，有效官能团被抑制。增加泡沫膨胀率不利于三相泡沫的稳定性。通过实际灭火效果评估了三相泡沫的现场应用。