At the present time, it is of major significance to study the solid-liquid-gas three-phase coupling relationship of coal, water, and gas in deep-mining stopes in order to prevent and control coal and gas outbursts in high-gas mines. In this study, the influence rules of water on the mechanical characteristics of coal, as well as gas diffusion and migration processes, was examined by combining theoretical analysis and laboratory testing procedures. The results showed that with increases in water content, the mechanical characteristics of coal bodies presented change trends of first increasing and then decreasing. In this study, it was found that the water content levels which corresponded to the maximum shear strength of the coal in the No. 8 coal seam in the study area had ranged between 6.77% and 11.9%, and the water content level corresponding to the extreme point was 8.66%. It was observed that under different water content conditions, the gas desorption speeds of the coal bodies gradually decreased over time. The gas desorption speeds rapidly decreased during the initial desorption stage and then gradually decreased over time. Furthermore, under the different water content conditions, the amount of gas desorption in the coal bodies was observed to gradually increase over time, with the initial desorption amounts displaying rapid increases. Then, with the passage of time, the increase speeds of the gas desorption amount gradually decreased and finally tended to remain at a stable value. It was found that with the increases in water content, the desorption speeds, initial desorption speeds, and desorption amount of gas in the coal bodies continuously decreased. In other words, the water content levels in the coal bodies were negatively correlated with the gas desorption speeds and desorption amounts of the coal bodies. In addition, the gas desorption speeds, initial desorption speeds, and desorption amounts were observed to change more sharply with the increases in water content. The results of this research hold important guiding significance for the improvement of the understanding of the mechanical properties of high-gas coal seams and the implementation of effective gas control measures.

中文翻译：

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煤、水、气固液气三相耦合关系研究

当前，研究深采采场煤、水、气固-液-气三相耦合关系对防治高瓦斯矿井煤、瓦斯突出具有重要意义。 . 在本研究中，结合理论分析和实验室测试程序，研究了水分对煤力学特性以及气体扩散和运移过程的影响规律。结果表明，随着含水量的增加，煤体的力学特性呈现先增大后减小的变化趋势。本次研究发现，研究区8号煤层煤体最大剪切强度对应的含水率在6.77%～11.9%之间，极值点对应的含水量为8.66%。观察到，在不同含水量条件下，煤体的瓦斯解吸速度随时间逐渐降低。气体解吸速度在初始解吸阶段迅速下降，然后随着时间的推移逐渐下降。此外，在不同含水量条件下，煤体中瓦斯解吸量随时间逐渐增加，初始解吸量迅速增加。然后，随着时间的推移，气体解吸量的增加速度逐渐减小，最终趋于保持在一个稳定值。发现随着含水量的增加，解吸速度、初始解吸速度、煤体中瓦斯的解吸量不断减少。换言之，煤体中的含水量水平与煤体的瓦斯解吸速度和解吸量呈负相关。此外，观察到气体解吸速度、初始解吸速度和解吸量随着含水量的增加而变化更剧烈。该研究结果对提高对高瓦斯煤层力学特性的认识，实施有效的瓦斯治理措施具有重要的指导意义。并且观察到解吸量随着含水量的增加而变化更剧烈。该研究结果对提高对高瓦斯煤层力学特性的认识，实施有效的瓦斯治理措施具有重要的指导意义。并且观察到解吸量随着含水量的增加而变化更剧烈。该研究结果对提高对高瓦斯煤层力学特性的认识，实施有效的瓦斯治理措施具有重要的指导意义。