摘要
文章通过在官地矿借助高压注水模设备,研究软煤和硬煤在外加水分含量和吸附平衡压力不同时的瓦斯解吸相关参数的变化规律。试验结果发现:外加水分阻碍软煤和硬煤的瓦斯解吸,对于软煤,外加水分具有更强的阻碍软煤的瓦斯解吸能力;在外界条件一致时,软煤的瓦斯解吸速度一直比硬煤高;在控制吸附平衡压力恒定条件时,持续增大外加水分含量,软煤和硬煤的瓦斯扩散系数均呈现出减小趋势。
This paper conducts experiments in Guangdi Coal Mine using a high-pressure water injection device to investigate the variations of relevant parameters for gas desorption in soft and hard coal under different levels of external moisture content and adsorption equilibrium pressure.The experimental results reveal that external moisture hinders gas desorption in both soft and hard coal.Specifically,external moisture exhibits a stronger inhibitory effect on gas desorption in soft coal.Under consistent external conditions,the desorption rate of gas in soft coal is consistently higher than that in hard coal.Moreover,when the adsorption equilibrium pressure is kept constant,increasing the external moisture content continuously leads to a decrease in the gas diffusion coefficient for both soft and hard coal.
作者
朱云龙
ZHU Yunlong(Guandi Coal Mine of XiShan Coal Electricity Group Co.,Ltd.,Shanxi Coking Coal Group,Shanxi 030000)
出处
《中国煤层气》
CAS
2023年第2期3-7,共5页
China Coalbed Methane
基金
国家自然科学基金项目《深部复杂煤层射流造缝导向压裂裂缝起裂及扩展机理》(51374258)。
关键词
软煤
硬煤
煤层注水
外加水分
瓦斯解吸
Soft coal
hard coal
coal seam water injection
external moisture
gas desorption