Tunnel and Underground Space (터널과지하공간)

Korean Society for Rock Mechanics and Rock Engineering (한국암반공학회)
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Variation of Rock Properties in Acidic Solution and Loading Condition

산성수 침수 및 하중 조건에서의 암석물성변화 연구

  • 정재홍 (인하대학교 에너지자원공학과) ;
  • 박승훈 (인하대학교 에너지자원공학과) ;
  • 이승준 (인하대학교 에너지자원공학과) ;
  • 유승원 (인하대학교 에너지자원공학과) ;
  • 이우희 (인하대학교 에너지자원공학과) ;
  • 권상기
  • Received : 2016.04.19
  • Accepted : 2016.06.02
  • Published : 2016.06.30
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Abstract

This paper presents experimental results to investigate the affects of acidic solution under loading condition on rock properties. In the experiment, the variations of various rock properties including effective porosity, thermal conductivity, and etc were investigated with different pHs of solution and magnitudes of loading. The results show that the rock property change was increased with low pH under loading. It was predicted that chemical reaction rate would be increased in low pH. Below the crack initiation stress of the rock specimen, the variation of rock property change was reduced with increased loading. It could be explained with the reduced chemical reaction area by the compressional loading if there is no crack generation.

본 연구에서는 산성수 및 하중의 화학 역학적 영향이 암석 물성에 미치는 영향을 파악하기 위한 실내 실험을 실시하였다. 실험에서는 암석시료에 pH 및 하중조건을 부여한 후, 유효 공극률을 포함한 다양한 암석 물성 변화를 측정하였다. 실험결과, 일정한 하중조건에서 암석을 침수시킨 산성수의 pH가 낮을수록 물성 변화가 증가하는 것으로 나타났다. 이는 산성수의 pH가 낮을수록 암석과 산성수 사이의 화학반응 속도가 증가했기 때문으로 예측된다. 또한 일정한 pH의 산성수에 침수된 암석에서 가해진 하중이 증가함에 따라 암석물성 변화가 감소하는 것으로 나타났다. 이는 균열개시응력 이하의 하중에서 발생된 압축으로 암석과 산성수 사이의 화학반응 영역이 감소했기 때문으로 여겨진다.

Keywords

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