Spontaneous combustion of coal is one of the major disasters that occur in coal mines, causing casualties and economic losses as well as serious environmental pollution.^1–4 Currently, the main tools used for the prevention and control of spontaneous combustion of coal in the coal mines include grouting,^5,6 inhibitor,^7–10 inert gas,^11–15 gel,^16–19 foam,^20–23 and foam resin.²⁴ These tools have played significant roles in such cases although they have also exhibited certain inadequacies. For instance, inert gases easily diffuse and often run out of the injection zone with air leak, gels exhibit low fluidity and the permeability regions in them are also limited, the three-phase foams are difficult to solidify and stable only for 8–12 h, and the organic foams are expensive and come with the possibility of undergoing an exothermic reaction. Novel materials are, therefore, required for decreasing the probability of spontaneous combustion of coal.

中文翻译：

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发泡剂对发泡凝胶性能的影响

煤炭的自燃是煤矿中发生的重大灾害之一，造成人员伤亡和经济损失以及严重的环境污染。^1-4目前，用于预防和控制煤矿中煤炭自燃的主要工具包括灌浆，^5,6抑制剂，^7-10惰性气体，^11-15凝胶，^16-19泡沫，^20-23和泡沫树脂。²⁴尽管这些工具也显示出某些不足之处，但它们在此类情况下发挥了重要作用。例如，惰性气体容易扩散并且经常漏出注射区域，凝胶显示出低流动性，并且其中的渗透性区域也受到限制，三相泡沫很难固化且只能稳定8-12小时，并且有机泡沫价格昂贵，并且可能发生放热反应。因此，需要新型材料来降低煤自燃的可能性。