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Special Articles

Quantitative Differences in Fracture Intensity and Connectivity along Different Types of Fault Damage Zone: A Case Study from a Strike-Slip Fault at Sinseondae, Geoje Island

단층손상대 유형에 따른 단열밀도 및 연결성의 정량적 차이: 거제도 신선대 주향이동단층의 예

Goeun Kim1
,
Jinhyeon So2
,
Sangyeol Bae2
,
Young-Seog Kim3*
김 고은1
,
소 진현2
,
배 상열2
,
김 영석3*
1MSc Student, Geologic Structure and Geohazard Research Group, Division of Earth and Environmental System Sciences, Pukyong National University
2PhD Student, Geologic Structure and Geohazard Research Group, Division of Earth and Environmental System Sciences, Pukyong National University
3Professor, Geologic Structure and Geohazard Research Group, Division of Earth and Environmental System Sciences, Pukyong National University
1국립부경대학교 지구환경시스템과학부 지질구조재해연구실 석사과정
2국립부경대학교 지구환경시스템과학부 지질구조재해연구실 박사과정
3국립부경대학교 지구환경시스템과학부 지질구조재해연구실 교수
*Corresponding Author
31 December 2025. pp. 495-513
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Abstract

단층손상대는 결정질 암반 내 단열 발달과 유체유동을 지배하는 핵심 구조로, 주전단면과 관련된 위치에 따라 구조적·수리학적 특성이 달라질 수 있다. 본 연구에서는 거제도 신선대에 발달한 주향이동단층을 대상으로 손상대 유형별 단열밀도와 연결성을 정량적으로 비교하였다. 정사영상 기반 2차원 단열망 분석과 위상기하학적 지표를 활용하였으며, 단층의 존재 유무에 따른 구조적 특성을 검증하기 위해 단층 제거 및 단열 연장 시나리오를 적용하였다. 분석 결과, 연결손상대와 말단손상대에서 벽손상대에 비해 높은 단열밀도 값과 연결성을 보였다. 이는 손상대 유형별 구조적 차이가 단열망의 유체유동 거동을 결정하는 핵심 요인임을 보여주며, 향후 암반 안정성 및 방사성폐기물처분장 이격거리 평가에 활용될 수 있다.

Keywords
fault damage zone
fracture intensity
connectivity
fluid-flow
strike-slip fault
respect distance

단층손상대는 결정질 암반 내 단열 발달과 유체유동을 지배하는 핵심 구조로, 주전단면과 관련된 위치에 따라 구조적·수리학적 특성이 달라질 수 있다. 본 연구에서는 거제도 신선대에 발달한 주향이동단층을 대상으로 손상대 유형별 단열밀도와 연결성을 정량적으로 비교하였다. 정사영상 기반 2차원 단열망 분석과 위상기하학적 지표를 활용하였으며, 단층의 존재 유무에 따른 구조적 특성을 검증하기 위해 단층 제거 및 단열 연장 시나리오를 적용하였다. 분석 결과, 연결손상대와 말단손상대에서 벽손상대에 비해 높은 단열밀도 값과 연결성을 보였다. 이는 손상대 유형별 구조적 차이가 단열망의 유체유동 거동을 결정하는 핵심 요인임을 보여주며, 향후 암반 안정성 및 방사성폐기물처분장 이격거리 평가에 활용될 수 있다.

키워드
단층손상대
단열밀도
연결성
유체유동
주향이동단층
이격거리
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Information
  • Publisher :Korean Society of Engineering Geology
  • Publisher(Ko) :대한지질공학회
  • Journal Title :The Journal of Engineering Geology
  • Journal Title(Ko) :지질공학
  • Volume : 35
  • No :4
  • Pages :495-513
  • Received Date : 2025-11-19
  • Revised Date : 2025-12-25
  • Accepted Date : 2025-12-26
  • DOI :https://doi.org/10.9720/kseg.2025.4.495
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