摘要
论述了煤屑瓦斯扩散理论及其模型研究成果。其中扩散理论主要有菲克扩散、考虑时变扩散系数时的菲克扩散、温度以及注水对煤扩散系数影响下的菲克扩散以及综合考虑其他因素影响时的扩散理论。煤屑瓦斯扩散的数学模型有定常扩散系数下的菲克扩散模型、时变扩散系数下的扩散模型、不同形状煤粒的瓦斯扩散模型以及其他因素影响下的扩散模型等。分析了各种扩散模型的建立方法,认为现有的煤粒瓦斯扩散模型考虑因素各有侧重,难于涵盖所有的扩散类型;尚未考虑实际应用过程中边界浓度时变条件下的瓦斯扩散特征。
The research achievement of gas diffusion theory of cinder and its models were expounded. The diffusion theory includes Fick＇s law of diffusion,Fick＇s diffusion considering time-dependent diffusion coefficient,diffusion coefficient of Fick＇s diffusion on the influence of temperature and water injection,and diffusion theory which were considered other factors. Mathematical model of gas diffusion of cinder include Fick＇s diffusion model with steady-state diffusion coefficient,diffusion model with time-dependent diffusion coefficient,gas diffusion model in different shape of cinder,and diffusion model based on other factors. The establishment method of kinds of diffusion model was analyzed. The research shows that,the considered factors of current gas diffusion model of cinder have different emphases,and it does not contain all types. Then,gas diffusion characteristic under time-varying boundary concentration in practical application is not studied.
出处
《中州煤炭》
2016年第6期22-25,29,共5页
Zhongzhou Coal
基金
国家科技重大专项(2011ZX05040-003-003)
