To investigate the effect of moisture content on coal in cryogenic treatment, based on a gas-containing coal cryogenic treatment simulation testing system and an automated mercury intrusion porosimeter, temperature changes, strains, and characteristic parameters of the pore structure of coal after cryogenic treatment were determined. In addition, a thermal–water–mechanical coupling theoretical model was established using COMSOL software to simulate the changes in temperature and volume of coal. It was observed that moisture content was correlated negatively with the rate of temperature drop of coal and correlated positively with the frost heave strain. After cryogenic treatment, the final volume of coal decreased and the pores increased. The experiment revealed that frost heave heat extended the temperature stabilization time by an average of 27%, while methane adsorption heat had almost no effect. It is recommended to control the moisture content of coal at around 5% when using cryogenic treatment for anti-outburst, while for frozen coring, the moisture content should be controlled below 3%. The research results provide significant understanding of changes caused by cryogenic treatment on coal and supply practical information for optimizing the industrial production application of cryogenic treatment on coal.

为研究含水率对深冷处理煤的影响，基于含瓦斯煤深冷处理模拟测试系统和自动化压汞孔隙仪，对深冷处理后煤的温度变化、应变和孔隙结构特征参数进行了研究。决定。此外，利用COMSOL软件建立了热-水-力耦合理论模型，模拟煤的温度和体积变化。研究发现，含水率与煤的温度下降速率呈负相关，与冻胀应变呈正相关。经过深冷处理后，煤的最终体积减少，孔隙增加。实验表明，冻胀热使温度稳定时间平均延长27%，而甲烷吸附热几乎没有影响。采用深冷防突出处理时，建议煤的含水率控制在5%左右，而采用冷冻取芯时，煤含水率应控制在3%以下。研究成果对于认识煤炭深冷处理带来的变化具有重要意义，为优化煤炭深冷处理工业生产应用提供实用信息。