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2021 Vol.31, Issue 3

Technical Note

Korea Stress Map 2020 using Hydraulic Fracturing and Overcoring Data

수압파쇄와 오버코어링 자료를 활용한 한국응력지도 2020

Hanna Kim1
,
Joong-Ho Synn2*
,
Chan Park2
,
Won Kyong Song2
,
Eui Seob Park2
,
Yong-Bok Jung2
,
Dae-Sung Cheon3
,
Seongho Bae4
,
Sung-Oong Choi5
,
Chandong Chang6
,
Ki-Bok Min7
김 한나1
,
신 중호2*
,
박 찬2
,
송 원경2
,
박 의섭2
,
정 용복2
,
천 대성3
,
배 성호4
,
최 성웅5
,
장 찬동6
,
민 기복7
1Senior Researcher, Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources
2Principal Researcher, Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources
3Principal Researcher, Geology Division, Korea Institute of Geoscience and Mineral Resources
4Managing Director, GeoGeny Consultants Group Inc.
5Professor, Department of Energy and Resources Engineering, Gangwon National University
6Professor, Department of Geological Sciences, Chungnam National University
7Professor, Department of Energy Systems Engineering, Seoul National University
1한국지질자원연구원 지질환경연구본부 선임연구원
2한국지질자원연구원 지질환경연구본부 책임연구원
3한국지질자원연구원 국토지질연구본부 책임연구원
4(주)지오제니컨설턴트 이사
5강원대학교 에너지자원･산업공학부 교수
6충남대학교 지질환경과학과 교수
7서울대학교 에너지시스템공학부 교수
*Corresponding Author
30 June 2021. pp. 145-166
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Abstract

Korea Stress Map database is built by integrating actual data of 1,400 in-situ stress measurements using hydraulic fracturing and overcoring method in South Korea. Korea Stress Map 2020 is presented based on the guideline proposed by World Stress Map Project. As detailed data, stress ratio and maximum horizontal stress direction distribution for each region are also presented. The dominant maximum horizontal stress direction in the Korean Peninsula is from northeast to southeast, and the magnitude of the in-situ stress is relatively distributed. There is some stress heterogeneity caused by local characteristics such as topographical and geological properties. We investigated case studies in which the in-situ stress was affected by mountainous topography, difference in rock quality of fracture zone, presence of mine or underground cavities, and geological structure of fault zone.

Keywords
Korea Stress Map
World Stress Map
In-situ stress
Hydraulic fracturing
Overcoring

지난 40여 년간 국내에서 수압파쇄법 및 오버코어링법을 이용하여 실제로 측정된 전국 1,400여개의 현지응력 실측자료를 통합하여 데이터베이스를 구축하고, 세계응력지도 프로젝트에서 제안한 가이드라인에 따라 한국응력지도 2020을 제작하였다. 이와 함께 세부 자료로 전국 각 지역별 현지응력 측압계수와 최대수평응력 방향 분포도를 제시하였다. 한반도 전역에서의 최대수평응력 방향은 북동에서 남동 방향으로 나타났고, 현지응력의 크기도 비교적 분산폭이 넓은 분포양상을 보였다. 이는 천부 심도에서 개별 측정 지역의 지형이나 암질 등과 같은 국지적 특성을 크게 반영한 것으로 보이며, 산악지형, 파쇄대의 암질변화, 광산 채굴과 지하공동의 유무, 단층대 지질구조 등이 암반 응력에 영향을 미친 사례들에 대해 조사해 보았다.

키워드
한국응력지도
세계응력지도
현지응력
수압파쇄
오버코어링
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Information
  • Publisher :Korean Society for Rock Mechanics and Rock Engineering
  • Publisher(Ko) :한국암반공학회
  • Journal Title :Tunnel and Underground Space
  • Journal Title(Ko) :터널과 지하공간
  • Volume : 31
  • No :3
  • Pages :145-166
  • Received Date : 2021-06-04
  • Revised Date : 2021-06-22
  • Accepted Date : 2021-06-24
  • DOI :https://doi.org/10.7474/TUS.2021.31.3.145
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