摘要
为了研究煤层瓦斯赋存、瓦斯吸附解吸规律以及瓦斯流动理论,设计了瓦斯吸附解吸的试验方案,研究了同一煤质、不同粒径煤样的等温吸附解吸特性。研究表明:定压动态下的瓦斯解吸量与时间的变化曲线与前人得到的函数曲线能够很好地吻合,建立了瓦斯吸附解吸的数学模型,发现煤样压力和煤样粒径分别对解吸量Q函数中的吸附常数a和b有影响。并通过恒温变压吸附解吸试验,分析了在解吸过程中突然改变煤层压力时的解吸方程,结果表明,改变解吸过程的煤层压力,煤体的解吸过程依然符合瓦斯吸附解吸数学模型。
In order to study the seam gas deposit,gas adsorption and desorption law and gas flow theory,a test plan of the gas adsorption and desorption was designed and the isothermy adsorption and desorption features of the same coal quality and different particle coal samples were studied.The study showed that the desorption quantity and time curve of the gas dynamic desorption value with rated pressure was well fitted with the function curve achieved by former scholars.A mathematics model of the gas adsorption and desorption was established.It was found that the pressure and particle of the coal sample separately influenced the adsorption constant a and b in the Q function.With the test of the constant temperature and pressure variation adsorption and desorption,the desorption equation was analyzed when the seam pressure suddenly changed during the desorption procedure.The results showed that when the seam gas pressure changed,the desorption procedure of the seam could still meet the gas adsorption and desorption mathematics model.
出处
《煤炭科学技术》
CAS
北大核心
2010年第7期58-60,共3页
Coal Science and Technology
关键词
瓦斯
动态吸附解吸
解吸量
解吸方程
gas
dynamic adsorption and desorption
desorption quantity
desorption equation
