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A Study on the Urethane Foam Material Characteristics and Appropriate Soil Covering for Mine Reclamation Emergency Action through Atificial Fire Test

인공 화재 실험을 통한 광해방지 응급조치용 우레탄 폼 재료 특성 및 적정 복토에 관한 연구

  • Received : 2020.04.08
  • Accepted : 2020.05.13
  • Published : 2020.06.28

Abstract

Mine Reclamation Project is being carried out with the aim of ensuring a sustainable green living and helping to develop eco-friendly mines by analyzing, removing and preventing the harmful factors. Mines developed during the japanese colonial period and mining boom period are still not repaired throughout the country, and from these scattered risks, public safety is worth pursuing as a top priority. The project that is close to public safety in the mine recalmation project is an emergency treatment, and the most widely used method is a filling method similar to the ground subsidence prevention. If dangerous mine cavity or tunnels are located in the mountains, charging with existing materials may not be possible, or unreasonable cases may occur, and new methods of technological development are required. Emergency actions should be carried out safely and efficiently to prevent the loss of precious people's lives on the hiking paths adjacent to dangerous mining sites. In these field conditions, urethane foam materials may be an alternative. In this study, the applicability of urethane foam materials in mining was reviewed through overseas cases. It was also tested on the appropriate depth of top soil for the protection of urethane foam materials through forest fire simulation test. The test result show that approximately 15cm of soil covering (recommended 20cm over) was suitable for maintaining the function of foam materials from forest fires.

광해방지사업은 광산 개발로 인해 국민건강 생활에 미치는 위해요인을 분석, 제거 및 예방을 통해 지속가능한 녹색생활권 보장 및 친환경적 광산개발을 도모를 목표로 수행되고 있다. 일제강점기 및 광산개발 활황기에 개발되어 전국에 산재된 광산은 아직도 복구되지 않은 상태로 방치되고 있으며, 이런 산재된 위험으로 부터 국민안전은 물러설수 없는 최우선의 가치가 되고 있다. 광해방지사업에서 국민안전과 밀접한 사업은 응급조치이며, 이중 가장 광범위하게 사용되고 있는 공법은 지반침하방지사업과 유사하게 충전공법이다. 위험한 광산 공동 및 터널이 산악에 위치한 경우, 기존 재료로 충전 공법이 불가능하거나, 불합리한 경우가 발생가능하며, 새로운 공법의 기술개발이 필요하다. 위험한 광산 채굴지가 인접한 등산로에서 국민의 소중한 인명피해가 발생하지 않도록 응급조치사업은 안전하고 효율적으로 시행되어야 한다. 이러한 현장여건에서 우레탄 폼 재료는 하나의 대안이 될수 있다. 본 연구는 우레탄 폼 재료의 해외 광업분야 적용사례를 살펴보고, 실규모 화재 실험을 통해 광해방지사업의 응급조치을 위한 우레탄폼 재료와 복토 심도에 적용성을 실험하였다. 실험결과를 통해 약 15cm의 복토(추천 20cm 이상)로 산림화재로부터 폼 재료의 기능유지에 적정하다는 결과를 얻었다.

Keywords

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