Tunnel and Underground Space (터널과지하공간)

Korean Society for Rock Mechanics and Rock Engineering (한국암반공학회)
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A Study on the Optimal Installation of Ducted Fan Ventilation System in Long Mine Airways - Focused on the Wall Separation Distance and the Gap Length between Ducts

장대 광산갱도내 풍관 접속 통기선풍기 최적 설치 방안연구 - 벽면과 풍관간의 이격거리 중심으로

  • Lee, Chang Woo (Department of Energy and Mineral Resources Engineering, Dong-A University) ;
  • Nguyen, Van Duc (Department of Energy and Mineral Resources Engineering, Dong-A University)
  • Received : 2017.01.06
  • Accepted : 2017.02.09
  • Published : 2017.02.28
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Abstract

In local underground mines heavily depending on the natural ventilation, ducted fan auxiliary ventilation system is strongly recommended instead of the total mine ventilation system requiring large capital and operating costs. Optimizing the installation of ducted fans in series in long large-opening mines is required to assure the economy and efficiency of the ventilation system. The two most critical design parameters for optimization are the wall separation distance and gap length between adjoining ducts. This study aims at deriving the optimal values for those two parameters concerning the economic and environmental aspects through the extensive CFD analysis, which minimizes pressure loss, leakage and entrainment of the contaminated air in the gap space. The ranges of the wall separation distance and gap length for study are selected by taking into consideration the existing recommendations and guidelines. The ultimate goal is to optimize the auxiliary ventilation system using ducted fans in series to provide a reliable and efficient solution to maintain clean and safe workplace environment in local long underground mines.

국내 석회석광산은 주로 자연통기에 의존하고 있으나 자본 및 운전비용이 과다하게 소요되는 광산 전체통기방법보다 풍관과 선풍기를 이용한 국부통기방법이 바람직한 방법으로 평가된다. 국내 대단면 장대 광산갱도에 풍관이 접속된 국부선풍기를 직렬로 연결 설치하는 경우에 통기시스템의 경제성과 효율의 최적화가 반드시 요구된다. 최적화를 위한 가장 중요한 두가지의 설계변수는 벽면 이격거리와 풍관 간의 이격거리이다. 본 연구에서는 경제적 및 환경적으로 최적화된, 즉 풍관간의 이격 공간을 통한 압력손실, 누기 그리고 오염된 공기의 재유입을 최소화할 수 있는 두 설계변수 값을 도출하기 위하여 광범위한 CFD분석을 시행하였다. 기존 연구결과와 권고기준들을 고려하여 이들 변수의 연구대상 범위를 선정하였다. 본 연구의 궁극적 목표는 국내 장대 광산갱도내 설치되는 풍관 접속 선풍기의 직렬연결 국부통기시스템의 최적화를 통하여 깨끗하고 안전한 작업장 환경을 제공하기 위함이다.

Keywords

References

  1. De Souza, E., 2004, Auxiliary ventilation operation practices. Ganguli, Rajive; Bandopadhyay, Sukumar. Mine Ventilation, Taylor & Francis Routledge, 341-349.
  2. Khanna, R.K., 2008, Ventilation of long tunnels, World tunnel congress 2008-Underground facilities for better environmental and safety-India, 1898-1910.
  3. Cho, H.J., Cheon, K.M., Kim, J.W. and Lee, J.Y., 2015, A study on the characteristics for temporary ventilation of long subsea tunnels-focused on the current situation and improvement(in Korean), Tunnel and Underground Space, v. 17, no. 2, 153-166. https://doi.org/10.9711/KTAJ.2015.17.2.153
  4. MOLIT (Korean Ministry of Land, Infrastructure and Transportation), 2010, The sixth section, Tunnel, The guideline for the vehicle tunn el design.
  5. ANSYS, Inc., 2015, FLUENT User's Guide. Version 15.0. Canonsburg, PA: ANSYS, Inc.
  6. Anisdahl, L.M., Johansson, B. and Thoen, K., 2008, Study on the performance of ventiflex ducting and couplings, Proceedings of 12th US/North American Mine Ventilation Symposium, 609-613.
  7. Vutukuri, V. S., 1987, Uncontrolled recirculation in auxiliary ventilation with fans in series along the duct. Mining Science and Technology, 5(3), 287-297. https://doi.org/10.1016/S0167-9031(87)90156-3
  8. Gillies A.D.S. and Wu H.W., 1999, A Comparison of Air Leakage Prediction Techniques for Auxiliary Ventilation Ducting Systems, Proceedings of the 8th US Mine Ventilation Symposium, University of Missouri-Rolla Press, Rolla, Missouri, USA, 681-690.
  9. Schweizerishcher Ingenieur-und Architekten-Verein (SIA), 1998, SIA 196 Bauluftung im Unteragabau, (SIA: Switzerland).
  10. 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.
  11. Hartman, H. L., Mutmansky, J. M., Ramani, R. V., and Wang, Y. J., 2012, Mine ventilation and air conditioning. John Wiley & Sons, 730p.
  12. Australian Mine Safety Technology Center Report, Rivers Carbon Technologies, 26/10/2010.
  13. Brake, D. J., and Nixon, C. A., 2006, Design and operational aspects in the use of booster, circuit and auxiliary fan systems. In Proceedings of the 11th US/North American Mine Ventilation Symposium, 543-553.
  14. ANSI/UL 181, 2013, Standard for Safety Factory-Made Air Ducts and Air Connectors.