Abstract
In this study, ventilation in mining faces with one duct (blowing) and two ducts (blowing and exhaust) was numerically analyzed. Underground ventilation is very important, particularly around underground mining faces, because many miners work together in these locations. For mine ventilation in the workplace, one duct (blowing) or two ducts (blowing and exhaust) are usually employed to supply fresh air and remove dirty air. The numerical solutions presented in this paper provide analytical, additional, and helpful information on flow structures for building safe and secure ducts for mine ventilation. The numerical code ANSYS CFX 19.1 was employed to solve related equations, and ICEM-CFD 19.1 was used for the numerical grids. The turbulence model was employed for good agreement with the experimental results. The Reynolds-averaged Navier–Stokes equations were resolved using this model. Second-order spatial discretization schemes were used in this simulation to ensure good solutions. The convergence of the numerical simulations was checked based on scaled residuals for the continuity, momentum, and turbulent equations. The distribution of velocity, flow streamlines, velocity vectors, eddy viscosity, and dust concentration are presented for the analysis of flow characteristics in ventilation ducts. Moreover, all flow quantities are explained in view of comparisons between the use of one duct (blowing) and two ducts (blowing and exhaust). The airflow around ventilation ducts and mining faces contains complicated vortices, which capture the air, thereby increasing its age and level of dust contamination.
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Acknowledgements
(1) 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).
(2) The project code of this work for Korea Institute of Geoscience & Mineral Resources (KIGAM) is NP2018-027.
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Kim, M., Park, J., Jo, Y., Lee, D., Yi, H. (2021). Numerical Investigation of Characteristics of Mine Ventilation Using One or Two Ducts in Underground Mining Faces. In: Bui, XN., Lee, C., Drebenstedt, C. (eds) Proceedings of the International Conference on Innovations for Sustainable and Responsible Mining. Lecture Notes in Civil Engineering, vol 109. Springer, Cham. https://doi.org/10.1007/978-3-030-60839-2_13
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DOI: https://doi.org/10.1007/978-3-030-60839-2_13
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