Hydraulic methods have been extensively employed to improve the production rate of commercially viable coalbed methane and prevent potential mining disasters resulting from the production of this methane by increasing the permeability of coal seams. In this paper, an experimental system with a stirrer was utilized to study the effects of water injection on the gas desorption characteristics of coal seams. Pressure‐released desorption values and total gas desorption values under conditions of different adsorption equilibrium pressures and water contents were determined. The results show that both the free gas and the adsorbed gas could be replaced by the injected water, causing the system pressure to increase significantly. When releasing the system pressure, the gas desorption value of the water‐injected coal sample was reduced. After water injection, the total desorption value of the coal was increased. Thus, water injection could help to promote coal gas desorption.

中文翻译：

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注水对煤层气解吸特性的影响

水力方法已被广泛采用，以提高商业上可行的煤层气的生产率，并通过增加煤层的渗透性来防止由于甲烷的生产而引起的潜在采矿灾害。本文采用带搅拌器的实验系统研究注水对煤层瓦斯解吸特性的影响。确定了在不同吸附平衡压力和水含量条件下的泄压解吸值和总气体解吸值。结果表明，注入的水可以同时置换自由气体和吸附气体，使系统压力显着增加。释放系统压力时，注水煤样品的气体解吸值降低。注水后，煤的总解吸值增加。因此，注水可以帮助促进煤气的解吸。