Original Article
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Purpose: This study is about offering ways of improving existing technical standards in order to propose how to deal with coal deep-seated fire and to increase effectiveness of wetting agent. Method: This study conducts infiltration experiment using eight tons of coal, three types of wetting agents and fire water. And this study analyzes domestic and international technical standards, overseas experimental cases. Result: It is found that two findings are identified; one is fire water cannot infiltrate into the coal due to high level of surface tension, and the other is three types of wetting agent can infiltrate into the coal to the depth of 5~25cm. Also, domestic wetting agent technical standards include measuring surface tension only and testing wood on extinguishing capacity test. On the other hand, this study found that deep-seated fire experiment using cotton, B-class fire test using heptane are used from abroad. Besides it is analyze that capillary rise test, sink test, contact angle measurement are conducted to increase effectiveness of wetting agent at the U.S. Bureau of Mines. Conclusion: Based on standards and cases of U.S. NFPA and Bureau of Mines, this study suggests that domestic technical standards should include adding a new test standard which measures infiltration directly.
연구목적: 본 연구에서는 석탄 심부 화재 발생 시 대응과 침윤소화약제의 실효성 확대를 위한 기술기준 개선방안을 제시하고자 하였다. 연구방법: 석탄 8톤과 침윤소화약제 3종, 소화용수를 활용하여 침투 실험을 수행하고, 국내⋅외 기술기준 및 해외 사례를 분석하였다. 연구결과: 소화용수는 높은 표면장력으로 인해 석탄 심부로 침투하지 못하였고, 침윤소화약제는 5~25cm 깊이까지 침투되었다. 국내 기술기준은 침투성에 대한 간접 측정 방식인 표면장력만 언급되어있고, 소화능력시험도 목재를 활용하는 것으로 확인되었다. 반면 해외에서는 면직물을 활용한 심부 화재 실험, 헵탄을 이용한 B급 화재 실험이 있는 것을 확인하였다. 그 외, 미 광산국에서는 모세관 상승 시험, 침전시험, 접촉각 측정이 있는 것으로 분석되었다. 결론: 미국 NFPA 및 광산국의 기준과 사례를 토대로 국내 기술기준도 침투성을 직접적으로 측정할 수 있는 기준을 추가하여 실효성을 확대할 필요가 있을 것으로 사료된다.
- Armand, V.B. (2018). NFPA 18 Standard on Wetting Agents. National Fire Protection Association, USA.
- Crowl, V.T., Wool-dridge, W.D.S. (1967). "A method for the measurement of adhesion tension of liquids in contract with powders." Society of Chemical Industry, No. 25, pp. 200-212.
- E. Cote (2008). Fire Protection Handbook. National Fire Protection Association, USA.
- Hansford, D.T., Grant, D.J.W., Newton, J.M. (1980). "The influence of processing variables on the wetting properties of a hydrophobic powder." Powder Technology, Vol. 26, pp. 119-126. 10.1016/0032-5910(80)85055-8
- Kim, J-H., Park, W-H., Kim, W-H., Myoung, S-Y. (2021). "A study on the effects of droplets characteristics of water mist on the spray density on the floor." Journal of Korean Society of Disaster Information, Vol. 17, No. 1, pp. 120-127.
- Kim, K.-S., Choi, Y.-J., Choi, J-W. (2022). "An experimental study on the spontaneous ignition of flaxseed oil and olive oil adsorbed on towels" Journal of Korean Society of Disaster Information, Vol. 18, No. 2, pp. 324-332.
- Kim, N.-K., Rie, D.-H. (2015). "A study of fire extinguishment characteristic for the real scale deap-seated fire." Journal of Fire Science Engineering, Vol. 29, No. 2, pp. 13-19. 10.7731/KIFSE.2015.29.2.013
- Schwendeman, J.L., Sun, S.-M., Salyer, I.O., Wurstner, A.L. (1972). "Polymer-augmented aqueous foams for suppression of respirable coal dust." Annals of the New York Academy of Sciences, Vol. 200, No. 1, pp. 765-783. 10.1111/j.1749-6632.1972.tb40237.x 4513344
- Walker, P.L., Petersen, E.E., Wright, C.C. (1952). "Surface active agent phenomena in dust abatement." Industry and Engineering Chemistry Research, Vol. 44, No. 10, pp. 2389-2393. 10.1021/ie50514a032
- William, H.Z. (1983). Laboratory Tests Selecting Wetting Agents for Coal Dust Control, 8815, Bureau of Mines, USA.
- Publisher :The Korean Society of Disaster Information
- Publisher(Ko) :한국재난정보학회
- Journal Title :Journal of the Society of Disaster Information
- Journal Title(Ko) :한국재난정보학회논문집
- Volume : 18
- No :3
- Pages :581-588
- DOI :https://doi.org/10.15683/kosdi.2022.9.30.581
Journal of the Society of Disaster Information
