- Volume 25 Issue 6
At present, local limestone mines with large opening employ auxiliary fans for workplace ventilation which have been used in coal mines with much smaller airways. Considering the low static pressure loss in the large-opening mines, high pressure auxiliary fans face serious economical limitations mainly due to their excessive capacity. The optimal fan selected for the ventilation in large-opening working places should supply air quantity enough for maintaining safe environment and keep its operating cost as low as possible. This study focuses on the development of a low pressure auxiliary fan designed to have smaller range of the static head but to have more potential for higher ventilation and energy efficiency. The flow characteristics of high and low pressure auxiliary fans were theoretical as well as experimentally investigated to assess the ventilation efficiency in term of environmental and economical aspects. Moreover, the low pressure fan was tested in two limestone mine sites with small and large cross-sectional areas for evaluating its ventilation efficiency. Results from this study can be applied to improve the economy and efficiency of auxiliary fan for ensuring better air quality and work environment management.
CFD analysis;Auxiliary fan;Fan selection;Large-opening mine;Work environment management
- Adu-Acheampong, A., McGunegle, B., and Stauffer, T., 2007, "Application of propeller fans at Wisconsin industrial sand-a case study", Mining Engineering, vol.5, no.9, pp. 57-60.
- Chekan, G.J., Colinet, J.F. and Grau III, R.H., 2006, "Impact of fan type for reducing respirable dust at an underground limestone crushing facility", proceedings of 11th US/North American Mine Ventilation Symposium, pp. 203-210.
- Grau III, R. H., Krog, R. B., and Robertson, S. B., 2006, Maximizing the ventilation of large-opening mines. In Proceedings of the 11th US/North American Mine Ventilation Symp. University Park, PA, USA, pp. 53-59.
- Grau III, R. H., Mucho, T. P., Robertson, S. B., Smith, A. C., and Garcia, F. (2002, June). Practical techniques to improve the air quality in underground stone mines. In the North American/Ninth US Mine Ventilation Symposium, Kingston, Ontario, Canada, pp. 123-129.
- Grau III, R.H., Robertson, S.B., Mucho, T.P., Garcia, F. and Smith, A.C., 2004, "NIOSH ventilation research addressing diesel emissions and other air quality issues in nonmental mines", Transactions vol.316, Society for Mining, Metallurgy, and Exploration,Inc., pp.149-158.
- Hartman, Howard L., et al., 2012, Mine ventilation and air conditioning. John Wiley & Sons.
- Krog, R.B. and Grau III, R.H., 2006, "Fan selection for large-opening mines: vane-axial or propeller fans-which to choose?", Proceedings of 11th US/North American Mine Ventilation Symposium, pp. 527-534.
- Krog, R.B., Grau III, R.H., Mucho, T.P., and Robertson, S.B., 2004, "Ventilation planning layouts for large opening mines", SME preprint 04-187, Society for Mining, Metallurgy and Exploration, Inc.
- Lee, C.W., Nguyen, V.D., 2014, "Venturi effect induced by local ventilation fan in large-opening room-and-pillar mining sites", Tunnel and Underground Space vol.24, no.6, pp. 464-472. https://doi.org/10.7474/TUS.2014.24.6.464
- McPherson, M.J., 2009, Subsurface ventilation and environmental engineering. Springer Science & Business Media.
- NIOSH, 2002, "Using propeller fans to improve ventilation in large-entry stone mines", NIOSH Technology News, no.499.
- Thimons, R. J. B., and F. N. Kissell, 1974. "Using sulfur hexafluoride as a gaseous tracer to study ventilation systems in mines". No. BM-RI-7916. Bureau of Mines, Washington, DC, USA.
- USGS, 2015, 2013 Mineral Yearbook, Republic of Korea.