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2024 Vol.34, Issue 3 Preview Page

Original Article

Evaluation of Hydrogeological Characteristics of Deep-Depth Rock Aquifer in Volcanic Rock Area

화산암 지역 고심도 암반대수층 수리지질특성 평가

Hangbok Lee1*
,
Chan Park1
,
Junhyung Choi2
,
Dae-Sung Cheon1
,
Eui-Seob Park3
이 항복1*
,
박 찬1
,
최 준형2
,
천 대성1
,
박 의섭3
1Principal Researcher, Deep Subsurface Storage and Disposal Research Center, Korea Institute of Geoscience and Mineral Resources
2Senior Researcher, Deep Subsurface Storage and Disposal Research Center, Korea Institute of Geoscience and Mineral Resources
3Leader, Deep Subsurface Storage and Disposal Research Center, Korea Institute of Geoscience and Mineral Resources
1한국지질자원연구원 심층처분환경연구센터 책임연구원
2한국지질자원연구원 심층처분환경연구센터 선임연구원
3한국지질자원연구원 심층처분환경연구센터 센터장
*Corresponding Author
30 June 2024. pp. 231-247
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Abstract

In the field of high-level radioactive waste disposal targeting deep rock environments, hydraulic characteristic information serves as the most important key factor in selecting relevant disposal sites, detailed design of disposal facilities, derivation of optimal construction plans, and safety evaluation during operation. Since various rock types are mixed and distributed in a small area in Korea, it is important to conduct preliminary work to analyze the hydrogeological characteristics of rock aquifers for various rock types and compile the resulting data into a database. In this paper, we obtained hydraulic conductivity data, which is the most representative field hydraulic characteristic of a high-depth volcanic bedrock aquifer, and also analyzed and evaluated the field data. To acquire field data, we used a high- performance hydraulic testing system developed in-house and applied standardized test methods and investigation procedures. In the process of hydraulic characteristic data analysis, hydraulic conductivity values ​​were obtained for each depth, and the pattern of groundwater flow through permeable rock joints located in the test section was also evaluated. It is expected that the series of data acquisition methods, procedures, and analysis results proposed in this report can be used to build a database of hydraulic characteristics data for high-depth rock aquifers in Korea. In addition, it is expected that it will play a role in improving technical know-how to be applied to research on hydraulic characteristic according to various bedrock types in the future.

Keywords
Deep-depth rock aquifer
Volcanic Rock
Hydrogeological characteristics
Hydraulic conductivity
Research on hydraulic characteristics according to bedrock type

고심도 암반대수층이 운영시설의 주요 대상이 되는 고준위 방사성폐기물 처분 분야에서 수리특성 정보들은 관련 처분 부지 선택, 처분 시설 상세 설계, 최적 시공 방안 도출 그리고 운영 시 안정성 평가에 있어 가장 중요한 핵심 요소로 작용한다. 국내에는 좁은 면적에 여러 암종이 혼재되어 분포하고 있기 때문에 다양한 암종별 암반대수층의 수리지질특성을 분석하고 이를 데이터베이스화 하는 사전 작업들이 중요하다. 본 논문에서는 고심도 화산암반대수층의 현장 수리특성 중 가장 대표적인 수리전도도 자료를 획득하고 이를 분석 평가하였다. 현장 자료 획득을 위해 자체적으로 개발된 고성능 수리시험 장치를 활용하였고, 표준화된 시험법 및 조사절차를 적용하였다. 수리특성 자료분석 과정에서는 심도별로 수리상수인 수리전도도 값을 구하였으며, 시험 구간에 위치한 투수성 암반 절리를 통한 지하수 흐름 양상에 관해서도 평가하였다. 본 논문에서 제안된 일련의 자료 획득 방법, 절차와 분석 결과들은 국내 고심도 암반대수층의 수리특성 자료 데이터베이스 구축에 활용됨과 더불어 향후 다양한 지역별 암종별 수리특성연구에 적용될 기술적 노하우를 향상시키는 역할도 할 것으로 기대된다.

키워드
고심도 암반대수층
화산암
수리지질특성
수리전도도
암종별 수리특성연구
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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 : 34
  • No :3
  • Pages :231-247
  • Received Date : 2024-06-10
  • Revised Date : 2024-06-11
  • Accepted Date : 2024-06-12
  • DOI :https://doi.org/10.7474/TUS.2024.34.3.231
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