Abstract
The three-dimensional fluid flow and mean age of air (MM) for a mine gallery with a single mining face are numerically analyzed. Both blowing and exhaust ducts can be employed for mine ventilation. The commercial computational fluid dynamics (CFD) code, ANSYS CFX 18.0, is chosen for numerical experiments. For the design of a ventilation duct, it is important that air at the mining face is rapidly discharged to the external environment as air trapped in vortices becomes contaminated. Parameters need to be set so that the blowing and exhaust duct designs are compatible. Thus, numerical experiments are carried out to understand the behavior of fluid flow and characteristics relating to MM. These experiments assess the outcomes of variables such as exhaust duct positions, mass flow rates, and velocity variations. Accordingly, the flow streamline velocity vectors, MM, and eddy viscosity are shown for the design of the exhaust duct. The designs for the ventilation duct are optimized by conducting a parametric analysis of MM according to the different scenarios provided in this study. The results present optimal design elements for the installation of both a blowing and exhaust duct at the mining face.
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This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (No. 20182510102380).
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Recommended by Editor Yang Na
Jongmyung Park is a Principal Researcher in the Korea Institute of Geoscience & Mineral Resources. He obtained his Ph.D. in mechanical engineering at the University of Utah, USA in 2006. His fields of interest are mine ventilation, turbulent heat transfer, and CFD.
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Yi, H., Park, J. & Kim, M.S. Characteristics of mine ventilation air flow using both blowing and exhaust ducts at the mining face. J Mech Sci Technol 34, 1167–1174 (2020). https://doi.org/10.1007/s12206-020-0218-0
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DOI: https://doi.org/10.1007/s12206-020-0218-0