Journal of Korean Tunnelling and Underground Space Association (한국터널지하공간학회 논문집)

Korean Tunnelling and Underground Space Association (한국터널지하공간학회)
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A review of the effects of rock properties on waterjet rock cutting performance

암석물성이 워터젯 암석절삭 성능에 미치는 영향고찰

  • Oh, Tae-Min (Underground Space Department, Korea Institute of Geoscience and Mineral Resources(KIGAM)) ;
  • Park, Eui-Seob (Underground Space Department, Korea Institute of Geoscience and Mineral Resources(KIGAM)) ;
  • Cheon, Dae-Sung (Underground Space Department, Korea Institute of Geoscience and Mineral Resources(KIGAM)) ;
  • Cho, Gye-Chun (Department of Civil and Environmental Engineering, KAIST) ;
  • Joo, Gun-Wook (Department of Civil and Environmental Engineering, KAIST)
  • 오태민 (한국지질자원연구원, 지하공간연구실) ;
  • 박의섭 (한국지질자원연구원, 지하공간연구실) ;
  • 천대성 (한국지질자원연구원, 지하공간연구실) ;
  • 조계춘 (한국과학기술원, 건설및환경공학과) ;
  • 주건욱 (한국과학기술원, 건설및환경공학과)
  • Received : 2015.09.01
  • Accepted : 2015.09.17
  • Published : 2015.09.30
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Abstract

The rock fracturing during waterjet cutting is very complicated because rock is inhomogeneous and anisotropic, compared with artificial materials (e.g., metal or glass). Thus, it is very important to verify the effects of rock properties on waterjet rock cutting performance. Properties affecting the rock cutting efficiency have been variously described in the literature, depending on the experimental conditions (e.g., water pressure, abrasive feed rate, or standoff distance) and rock-types studied. In this study, a rock-property-related literature review was performed to determine the key properties important for waterjet rock cutting. Porosity, uniaxial compressive strength, and hardness of the rock were determined to be the key properties affecting waterjet rock cutting. The results of this analysis can provide the basic knowledge to determine the cutting efficiency of waterjet rock cutting technology for rock excavation-related construction.

암석은 인공적인 재료(금속, 유리)에 비해 불균질하고 이방성을 가지고 있기 때문에 워터젯 절삭시 매우 복잡하게 파쇄되는 특성을 가진다. 워터젯 절삭시 암석특성에 따라 절삭성능이 결정되므로 물성에 대한 영향을 파악하는 것은 매우 중요하다. 워터젯 절삭효율에 영향을 미치는 물성은 선행문헌의 실험조건(수압, 연마재 투입량, 이격거리 등) 및 암종에 따라 다양하게 제시되고 있다. 본 연구에서는 워터젯 시스템을 이용한 암석절삭에 있어서 물성영향에 대해 문헌연구를 실시하고 중요 물성을 분석하였다. 선행문헌 연구를 통해 암석의 공극율, 일축압축강도, 경도가 워터젯 암석 절삭에 있어서 중요한 물성으로 도출되었다. 분석결과는 향후 워터젯 절삭 기술을 이용한 터널공사시, 암반특성에 따른 굴착효율을 예측하기 위한 기초지식을 제공할 수 있을 것이다.

Keywords

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