摘要
基于以往试验成果,得到煤体渗透率与其吸附气含量之间的函数关系,建立考虑吸附作用影响的煤层瓦斯非线性渗流数学模型,该模型表征的渗流阻力更清晰,物理意义更明确。达西定律是该模型的特例。在此基础上,采用数学物理方法推导考虑吸附作用的煤层瓦斯渗流方程分析解,更真实地反映了瓦斯在煤层中的运移特征。考虑吸附作用的数学模型的计算结果与试验结果吻合很好,应用该模型可为矿井瓦斯灾害的治理和煤层气资源的开发提供基础理论和依据。
The nonlinear equations of gas seepage in coal considering adsorption effect was established based on the relationship between the permeability of coal and the quantity of adsorbed gas from the earlier experimental results. The dimension and the physical meaning of the parameters in the derived equations are clearer. Darcy's law is a special case of the derived equations. An analytical solution of the gas seepage equation was derived. This analytical solution reflected the migration of the gas in coal seams faithfully. There was a good agreement between the results from the new model and the experiment results of gas flow in coal sample.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2015年第5期1006-1012,共7页
Chinese Journal of Rock Mechanics and Engineering
基金
"十二五"国家科技重大专项(2011ZX05040–003)
关键词
采矿工程
吸附作用
瓦斯
渗流
分析解
吸附量
mining engineering
adsorption effect
gas
seepage
analytical solution
adsorption quantity
