无因次在煤粒瓦斯放散模型解算中的应用.pdfVIP

Vol郾44 No郾2 矿业安全与环保 第44卷摇 第2期 Apr郾2017 摇 摇 摇 摇 摇 摇 摇 摇 摇 MINING SAFETY ENVIRONMENTAL PROTECTION摇 摇 摇 摇 摇 摇 摇 2017年4月 郝永江,叶飞,庞杰文.无因次在煤粒瓦斯放散模型解算中的应用[J].矿业安全与环保,2017,44(2):88-90. 文章编号:1008-4495(2017)02-0088-03 无因次在煤粒瓦斯放散模型解算中的应用 郝永江 ,叶摇 飞 ,庞杰文1 2 1 (1.太原科技大学环境与安全学院,山西 太原030024;2.北京市安全生产科学技术研究院,北京 100070) 摘要:根据达西定律建立了瓦斯在煤粒中放散的数学模型,通过无因次化简化了瓦斯流动方程,并 利用有限差分法编程进行解算。 解算过程中减少了条件的代入次数并且得到各种无因次量,分析得出 煤粒内部瓦斯压力和累计解吸量的变化规律。 通过引入无因次量,能够简化方程的求解过程及程序的 编写,而且由此得出的煤粒瓦斯放散规律更具有普遍意义。 关键词:无因次;煤粒;瓦斯放散;达西定律 中图分类号:TD712摇 摇 摇 文献标志码:B摇 摇 摇 网络出版时间:2017-04-11 10:11 网络出版地址:http:/ / / kcms/ detail/ 50.1062.TD1011.018.html Application of Dimensionless in Solution of Gas Emission Model of Coal Particles 1 2 1 HAO Yongjiang ,YE Fei ,PANGJiewen (1.College of Environment and Safety,Taiyuan University of Science and Technology,Taiyuan030024,China; 2.BeijingAcademy of Safety Science and Technology,Beijing 100070,China) Abstract:The mathematical model of gas emission of coal particleswas established according to Darcy law ,the gasflow equationswere simplified by dimensionless, and the finite difference method was used in the program for calculation. The number of condition substitutions in calculating process was reduced and some dimensionless quantities were got. The change rule of the gas pressure and the cumulative desorption amount in the coal particles was obtained from the analysis. Therefore, the introduction of the dimensionless quantity can simplify the solution process of the equations and thewriting of the program, and the gas emission laws of coal particleswhich were got from it are more universal.