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RESEARCH ON FLOW SHIFT LAW OF POROUS MEDIA IN GOAF BASE ON THE UNSTEADY AIRFLOW THEORY

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Author(s): LI YONGCUN | LIN AIHUI | WANG HAIQIAO | ZOU SHENGHUA

Journal: Journal of Engineering Science and Technology
ISSN 1823-4690

Volume: 5;
Issue: 1;
Start page: 67;
Date: 2010;
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Keywords: Unsteady airflow theory | Mathematical model | Numerical simulation | Porous media | Goaf

ABSTRACT
Based on unsteady flow theory, supported by the theories of mine ventilation, fluid mechanics and infiltration flow through porous media, a mathematical model of fluctuating airflow in the porous media of goafs of mines is established. Features of distribution of flow field in goaf when airflow fluctuating are researched by numerical simulation, and the distribution of flow field is tested with the help of an experiment model which was designed and done by the authors. The results show that the numerical simulation and experiment agree well. This shows that the mathematical model of flow field of porous media in goaf of mine established in the paper can be used to research distribution of flow field in goaf and flow shift law.
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