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<p>Pre-mining injection of inhibition fluid is a whole-process, long-lasting fire resistance inhibition method. However, during the process of injecting the inhibitor into the coal seam, the strong hydrophobicity of coal often makes it difficult for the inhibitor to be injected, which severely affects the inhibitory effect of the inhibition fluid. In order to improve the efficiency of inhibitor injection and thereby enhance the inhibitory effect of the inhibition fluid, this study prepared a wetting-enhancing inhibition material. The inhibition-wetting characteristics and mechanism of action of the material were studied through contact angle experiments, programmed temperature rise experiments, scanning electron microscopy, and Fourier transform infrared spectroscopy experiments. Through contact angle experiments and programmed temperature rise experiments, the results indicate that the wetting-enhancing inhibition material effectively improved the inhibition-infiltration effect of the inhibitor on the coal body. Among them, the wetting-enhancing inhibition material prepared with 25% ZnCl<sub>2</sub> and 0.06% rapid penetrant T exhibited the optimal comprehensive inhibition-wetting performance, with CO release reduced by approximately 20% compared to other inhibition fluids, and the static contact angle reduced by about 20–50%. The results from scanning electron microscopy and Fourier transform infrared spectroscopy experiments show that the wetting-enhancing inhibition material exerts its inhibitory effect by covering the pores and cracks on the coal surface, retaining water and absorbing heat, as well as capturing free radicals. By reducing the surface tension between the material and coal, increasing the infiltration rate of the material, increasing the number of hydrogen bonds, and enhancing capillary forces, the penetration rate is improved. In summary, the wetting-enhancing inhibition material demonstrates excellent performance, and this study provides an important basis for the theoretical research of innovative inhibitors.</p> Graphical abstract <p></p>

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Synergistic Mechanism of Wetting and Inhibition of Moistening and Inhibiting Material in Preventing Coal Spontaneous Combustion

  • 期刊论文

  • 发表日期：

    2025年5月2日

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  • Wenlin Li,
  • Lifen Fang,
  • Wenjie Wang,
  • Guoqiang Yan,
  • Zhijie Zhang,
  • Yanming Ding,
  • Guansheng Qi,
  • Wenzhou Du

摘要

Pre-mining injection of inhibition fluid is a whole-process, long-lasting fire resistance inhibition method. However, during the process of injecting the inhibitor into the coal seam, the strong hydrophobicity of coal often makes it difficult for the inhibitor to be injected, which severely affects the inhibitory effect of the inhibition fluid. In order to improve the efficiency of inhibitor injection and thereby enhance the inhibitory effect of the inhibition fluid, this study prepared a wetting-enhancing inhibition material. The inhibition-wetting characteristics and mechanism of action of the material were studied through contact angle experiments, programmed temperature rise experiments, scanning electron microscopy, and Fourier transform infrared spectroscopy experiments. Through contact angle experiments and programmed temperature rise experiments, the results indicate that the wetting-enhancing inhibition material effectively improved the inhibition-infiltration effect of the inhibitor on the coal body. Among them, the wetting-enhancing inhibition material prepared with 25% ZnCl2 and 0.06% rapid penetrant T exhibited the optimal comprehensive inhibition-wetting performance, with CO release reduced by approximately 20% compared to other inhibition fluids, and the static contact angle reduced by about 20–50%. The results from scanning electron microscopy and Fourier transform infrared spectroscopy experiments show that the wetting-enhancing inhibition material exerts its inhibitory effect by covering the pores and cracks on the coal surface, retaining water and absorbing heat, as well as capturing free radicals. By reducing the surface tension between the material and coal, increasing the infiltration rate of the material, increasing the number of hydrogen bonds, and enhancing capillary forces, the penetration rate is improved. In summary, the wetting-enhancing inhibition material demonstrates excellent performance, and this study provides an important basis for the theoretical research of innovative inhibitors.

Graphical abstract