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A Case Study on the Ventilation and Heat Environment in a Underground Limestone Mine with Rampway

Rampway 설치 석회석 광산내 환기 현황 및 열환경 분석 사례연구

  • Received : 2012.05.29
  • Accepted : 2012.06.12
  • Published : 2012.06.30

Abstract

As more diesel engines have been employed in underground limestone mines with large cross section, underground space environment is worsened by diesel exhausts and heat flow. This paper aims for the ultimate goal to optimize the work place environment through assuring the optimal required ventilation rate based on the analysis of the airflow, diesel exhaust gas concentrations and the effects of mechanization and deepening working face on temperature and humidity. Due to the insufficient capacity of the main exhaust fan and poor airway management, stagnant airflows were observed at various locations, while the flow direction was reversed instantly with passing diesel equipment and the flow reversal was also made by the seasonal variation of the outside surface weather. During the loading operation, CO concentration measurements were found to be frequently higher than the threshold limit of 50 ppm, and most of the $NO_2$ measurements during drilling and loading operations shows even more serious levels surpassing the permissible limit of 3 ppm. The actual ventilation quantity was considerably less than the required quantity estimated by the mine health and safety law, and this shortage problem was less serious in colder winter showing more effectiveness of the natural ventilation.

Keywords

Limestone mine;Rampway;Thermal environmental;Carbon monoxide;Nitrogen oxide

References

  1. Ministry of Knowledge Economy, 2011, Mine Health and Safety, Chapter 2, Section 1, Act 49.
  2. Ministry of Knowledge Economy, 2011, Mine Health and Safety, Chapter 2, Section 1, Act 55.
  3. C. W. Lee, H. G. Kim, 2001, On-site application of a vehicle tunnel ventilation simulator, Tunnel and underground space, Vol. 11, No. 4, pp. 319-327.
  4. C. W. Lee, H. C. Park, 2009, A study on the natural ventilation force in tunnels, Tunnel and underground space, Vol. 19, No. 3, pp. 226-235.
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  6. G. H. Schnakenberg Jr, 2001, Estimate of technically feasible DPM levels for underground metal and nonmetal mines, NIOSH, Pittsburgh Research Laboratory, Pittsburgh, PA, pp. 1-7.
  7. Kevin Hedges, Fritz Djukic, Gavin Irving, 2007, Diesel particulate matter in underground mines - Controlling the risk (an update), pp. 1-15.
  8. R. H. Grau III, R. B. Krog, Ventilating large opening mines, Pittsburgh Research Laboratory, Pittsburgh, PA, pp. 1-7.

Cited by

  1. Study on the turbulent diffusion coefficients of contaminants in an underground limestone mine with large cross section using tracer gas vol.16, pp.2, 2013, https://doi.org/10.1080/12269328.2013.806051

Acknowledgement

Grant : 녹색성장형 광산개발을 위한 시설물 갱내화 및 환경 모니터링 기술개발

Supported by : 지식경제부