Tunnel and Underground Space (터널과지하공간)

Korean Society for Rock Mechanics and Rock Engineering (한국암반공학회)
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Evaluation of Rock Discontinuity Roughness Anisotropy based on Digital 3D Point Cloud Data

디지털 3차원 점군데이터 기반 암반 불연속면 거칠기 이방성 평가

  • Taehyeon Kim (Department of Energy & Resources Engineering, Korea Maritime & Ocean University) ;
  • Kwang Yeom Kim (Department of Energy & Resources Engineering, Korea Maritime & Ocean University)
  • 김태현 (한국해양대학교 에너지자원공학과) ;
  • 김광염 (한국해양대학교 에너지자원공학과)
  • Received : 2023.11.01
  • Accepted : 2023.11.07
  • Published : 2023.12.31
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Abstract

The roughness of discontinuity significantly influences the mechanical characteristics of rock masses and extensively affects thermal and hydraulic behaviors. In this study, we utilized photogrammetry to generate 3D point cloud data for discontinuity and applied this data to characterize the roughness of discontinuity. The discontinuity profiles, reconstructed from the 3D point cloud data, were compared with those manually measured using a profile gauge. This comparison served to validate the accuracy and reliability of the acquired point cloud data in replicating the actual configurations of rock surfaces. Subsequent to this validation, influence of the number of profiles for representative JRC assessment was further investigated followed by suggestion of roughness anisotropy evaluation method with application of it to actual rock discontinuity surfaces.

불연속면 거칠기는 암반의 기계적 특성에 큰 영향을 주며 열·수리 역학적 거동에도 많은 영향을 미치는 요소이다. 본 연구에서는 입체사진측량기법을 이용하여 불연속면에 대한 3차원 점군 데이터를 생성시키고 이를 이용하여 불연속면의 거칠기 특성화를 수행하였다. 3차원 점군 데이터로 재생성된 불연속면 프로파일과 프로파일 게이지를 이용하여 수동으로 측정한 프로파일을 비교하여 취득한 점군 데이터가 암반면의 실제 형상을 정확하게 재현하였는지 평가하였다. 또한, 측정 프로파일수가 거칠기 평가에 미치는 영향에 대해 분석하였고, 거칠기의 이방성 평가방법을 제안하고 실제 암반 불연속면에 대한 거칠기 이방성 평가를 수행하였다.

Keywords

Acknowledgement

본 연구는 해외자원개발협회 주요사업인 스마트 마이닝 전문 인력 양성(2021-0316-03)의 지원을 받아 수행되었습니다.

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