煤粒瓦斯非稳态扩散机理研究  

Study on gas unsteady state diffusion mechanism of coal particles gas

作　　者：王志亮[1] 陈学习[1] 杨涛[1] WANG Zhiliang;CHEN Xuexi;YANG Tao(School of Safety Engineering,North China Institute of Science and Technology,Yanjiao,065201,China)

机构地区：[1]华北科技学院安全工程学院,北京东燕郊065201

出　　处：《华北科技学院学报》2022年第4期43-47,共5页Journal of North China Institute of Science and Technology

摘　　要：以非稳态扩散理论为基础,借助传质学基本原理建立了球坐标系下煤粒瓦斯扩散的物理数学模型,采用分离变量法求出模型的解析解,所得结果可定量计算煤粒动态瓦斯扩散量和极限扩散量。依据传质原理分析了煤粒瓦斯扩散特性,阻力分布准数反映了煤粒瓦斯扩散场的阻力特性,扩散分布准数反映了扩散场的动态变化特性。Base on unsteady diffusion theory and mass transmission fundamental,the mathematical and physical model of gas diffusion through coal particles in spherical coordinates is established and its analytical solution is obtained by separate variableness method.The obtained results can be used to quantitatively calculate the dynamic gas diffusion quantity and the maximum diffusion quantity of coal particles.The diffusion characteristics of gas through coal particles was analyzed according to the mass transmission theory.The results show that coefficient of resistance distribution can reflect the resistance characteristic of gas diffusion and coefficient of diffusion distribution can represent the dynamic feature of diffusion field varying with time.

关 键 词：瓦斯扩散模型 解析解 阻力分布准数 扩散分布准数 

分 类 号：TD712[矿业工程—矿井通风与安全]