Tunnel and Underground Space (터널과지하공간)

Korean Society for Rock Mechanics and Rock Engineering (한국암반공학회)
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A Case Study of Site Investigation and Ground Stability Analysis for Diagnosis of Subsidence Occurrence in Limestone Mine

석회석 광산 지역의 지반침하 원인 규명을 위한 현장조사와 지반 안정성 분석 사례

  • 이승중 (강원대학교 공과대학 자원공학과) ;
  • 김병렬 (강원대학교 공과대학 자원공학과) ;
  • 최성웅 (강원대학교 공과대학 자원공학과) ;
  • 오석훈 (강원대학교 공과대학 자원공학과)
  • Received : 2015.07.21
  • Accepted : 2015.08.11
  • Published : 2015.08.31
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Abstract

Ground subsidence occurring in mine area can cause an enormous damage of loss of lives and properties, and a systematic survey should be conducted a series of field investigation and ground stability analysis in subsidence area. This study describes the results from field investigation and ground stability analysis in a limestone mine located in Cheongwon-gun, Chungcheongbuk-do, Korea. Rock mechanical measurements and electrical resistivity surveys are applied to obtain the characteristics of in-situ rock masses and the distribution patterns of subsurface weak zone, and their results are extrapolated in numerical analysis. From the field investigation and stability analysis, it is concluded that the subsidence occurrence in this limestone mine is caused mainly by subsurface limestone cavities.

광산지역에서 발생하는 지반침하는 인명과 지표시설물에 막대한 피해를 초래할 우려가 있으므로 지반침하 발생지역에 대한 일련의 현장조사와 지반안정성 분석은 체계적으로 수행되어야 한다. 본 연구에서는 충청북도 청원군에 위치한 석회석 광산의 일부 지점에서 발생한 지반침하의 원인을 규명하기 위하여 현장조사와 지반안정성 분석을 수행하였다. 이를 위하여 조사지역 암반의 공학적 특성을 조사하고, 전기비저항 탐사를 통해 지표 부근 연약대의 분포양상을 파악하였으며, 이 결과들을 토대로 침하원인 규명을 위한 전산해석을 수행하였다. 해석결과, 본 광산지역에서 발생된 지반침하는 석회암층에서 발달된 용식공동에 의한 것으로 분석되었다.

Keywords

References

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