摘要
为探究超声波对实际煤层的增渗及强化瓦斯抽采效果的影响,本文进行了基于低温氮气吸附的超声激励含水煤孔隙结构表征实验,分析了超声作用对不同含水量煤粒的的影响。结果表明:超声处理后煤样氮气的最大吸附量增大5.446%~40.93%,且增大幅度与煤样含水量有关。超声作用下饱水煤样的孔表面与孔结构的变化最为显著,平均孔径增涨了74.98%,比表面积和孔体积分别增加了70.02%、90.19%。由此表明,超声处理对煤体孔隙有扩孔效应,且煤样含水量越高,孔隙改性效果越明显。
In order to investigate the influence of ultrasonic waves on the permeability enhancement of actual coal seams and the strengthening effect of gas extraction,this paper carried out ultrasonically stimulated pore structure characterization experiments of water-bearing coal based on low-temperature nitrogen adsorption,and analyzed the influence of ultrasonication on the coal particles of different water contents.The results show that The maximum adsorption capacity of nitrogen in coal increased by 5.446%-40.93%after ultrasonic treatment,and the increase was related to the water content of coal samples.The average pore size increased by 74.98%,and the specific surface area and pore volume increased by 70.02%and 90.19%respectively.The results show that ultrasonic treatment has a pore expansion effect on the pores of the coal body,and the higher the water content of the coal sample,the more obvious the pore modification effect.
作者
李云
LI Yun(Yuwu Coal Industry Company,Shanxi Lu’an Group,Changzhi 046103,China)
出处
《煤矿现代化》
2024年第6期74-78,共5页
Coal Mine Modernization
关键词
氮气吸附
超声波
孔隙结构
nitrogen adsorption
ultrasound
pore structure characterization
