摘要
通过试验研究了施加交变电场条件下的煤体瓦斯渗透特性,并分析了其作用机理.研究结果表明,煤体瓦斯渗透率对电场有明显的响应:施加电场后,煤体瓦斯的渗透率提高,并且随着电场作用频率和强度的增加而提高;其作用机理是:外加电场作用使煤瓦斯分子热运动加剧,吸附势阱降低,吸附量降低,活性提高,增强了瓦斯的解吸和扩散,使煤体瓦斯的有效渗透通道增大.这对于提高煤矿瓦斯排放率和煤层气的开发利用,对于防治煤矿瓦斯灾害都有重要的现实意义.
The gas permeability of coal was studied in AC electric field, and its mechanism was analyzed. The result shows that gas permeability of coal has obvious response to electric field. The permeability of coal gas can can be enhanced by exerted electric field. And it enhances along with the frequency and intensity of the electric field. The mechanism is that applied electric field accelerates thermal motion, reduces the potential well and adsorption quantity, enhances activity of gas molecules, strengthens the desorption and diffusion of gas and enlarges effective permeability channels of coal gas. It is important in enhancing gas drainage and exploitation and using of coal seam gas, and preventing gas disasters of coal mine.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2004年第1期62-65,共4页
Journal of China University of Mining & Technology
基金
国家杰出青年基金项目(59925411)
