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Development of coupled THMC numerical simulator and it application to geological disposal

Research Project

Project/Area Number 19H02237
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 22030:Geotechnical engineering-related
Research InstitutionEhime University

Principal Investigator

YASUHARA HIDEAKI  愛媛大学, 理工学研究科(工学系), 教授 (70432797)

Co-Investigator(Kenkyū-buntansha) 岸田 潔  京都大学, 工学研究科, 教授 (20243066)
木下 尚樹  愛媛大学, 理工学研究科(工学系), 准教授 (30263958)
青柳 和平  国立研究開発法人日本原子力研究開発機構, 核燃料・バックエンド研究開発部門 幌延深地層研究センター, 研究職 (40636841)
Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2021: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2020: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2019: ¥8,710,000 (Direct Cost: ¥6,700,000、Indirect Cost: ¥2,010,000)
Keywords熱・水・応力・化学連成 / 連成数値シミュレータ / き裂性岩盤 透水・物質移行挙動 / 地層処分事業 / き裂性岩盤 / 透水・物質移行挙動 / 亀裂性岩盤 / 地層処分技術
Outline of Research at the Start

本研究では、地層処分時に想定される深地層下における高圧力環境、廃棄体からの放熱に起因する高温環境、セメント材料溶出に起因する高pH環境、海陸接合部の塩水環境という連成環境における岩石亀裂の長期透水・物質移行試験を実施し、透水・物質移行特性の長期変性メカニズムを明らかにする。さらに、『熱・水・応力・化学・連成解析シミュレータiPSACC』を開発し、連成環境下における岩盤の透水・物質移行特性の長期変性を予測し、処分施設近傍の岩盤の長期性能評価を実施する。

Outline of Final Research Achievements

Roughness stiffness tests and flow-through experiments were conducted under high temperature, high pressure, and saline water conditions to simulate an underground environment in granite with a single fracture. Roughness stiffness tests were conducted to improve the interlocking of the rock samples, and flow-through experiments were conducted to evaluate the effect of simulated seawater under high temperature conditions on the permeability properties of the granite fracture. ICP emission spectroscopic analysis, fracture surface profiling, and scanning electron microscopy were also conducted to investigate the factors that cause changes in permeability over time. In addition, a coupled simulator was developed to describe the permeability change of cracks in a coupled thermal, hydraulic, stress, and chemical field, and the validity and usefulness of the simulator were verified by reproducing and analyzing laboratory tests.

Academic Significance and Societal Importance of the Research Achievements

本研究では、地層処分時に想定される温度、応力、地下水環境を模擬した条件で室内試験を実施し、亀裂性岩盤の透水特性の長期変性メカニズムを明らかにした。また、変性メカニズムを記述する現象論モデルを実装した熱・水・応力・化学・連成解析シミュレータを開発した。本研究成果は、地層処分技術の信頼性向上のために必須事項と設定されている課題に真正面から取り組んでおり学術的意義は高い。

Report

(4 results)
  • 2022 Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (17 results)

All 2022 2021 2020 2019

All Journal Article (2 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (15 results) (of which Int'l Joint Research: 10 results)

  • [Journal Article] Predictions of Rock Temperature Evolution at the Lahendong Geothermal Field by Coupled Numerical Model with Discrete Fracture Model Scheme2020

    • Author(s)
      Qarinur Muhammad、Ogata Sho、Kinoshita Naoki、Yasuhara Hideaki
    • Journal Title

      Energies

      Volume: 13 Issue: 12 Pages: 3282-3282

    • DOI

      10.3390/en13123282

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Coupled thermal-hydraulic-mechanical-chemical modeling for permeability evolution of rocks through fracture generation and subsequent sealing2020

    • Author(s)
      Sho Ogata, Hideaki Yasuhara, Naoki Kinoshita, Kiyoshi Kishida
    • Journal Title

      Computational Geosciences

      Volume: 記載なし Issue: 5 Pages: 1845-1864

    • DOI

      10.1007/s10596-020-09948-3

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 高温・高圧環境における 塩水を用いた花崗岩不連続面の透水実験2022

    • Author(s)
      佐古大地,緒方奨,大西史記,木下尚樹,安原 英明
    • Organizer
      第48回岩盤力学に関するシンポジウム
    • Related Report
      2021 Annual Research Report
  • [Presentation] 塩水を用いた高温・高圧環境における花崗岩不連続面の透水実験2021

    • Author(s)
      佐古大地,安原英明,木下尚樹
    • Organizer
      令和3年度土木学会四国支部技術研究発表会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 温度・拘束圧制御下の泥岩不連続面剛性及び摩擦強度の経時変化に関する研究2021

    • Author(s)
      大西史記,安原英明,木下尚樹
    • Organizer
      令和3年度土木学会四国支部技術研究発表会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 塩水・高温・高圧環境における花崗岩不連続面の透水特性2021

    • Author(s)
      佐古大地,安原英明,木下尚樹
    • Organizer
      令和3年度地盤工学会四国支部技術研究発表会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 温度・拘束圧制御下における泥岩不連続面の剛性および摩擦強度の実験的検討2021

    • Author(s)
      大西史記,安原英明,木下尚樹
    • Organizer
      令和3年度地盤工学会四国支部技術研究発表会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Evolution of permeability in a single granite fracture under various temperature, confining pressure, and pH conditions2020

    • Author(s)
      Hideaki Yasuhara, Kiyoshi Kishida and Naoki Kinoshita
    • Organizer
      AGU Fall Meeting 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Performance evaluation of the Lahendong geothermal field by coupled numerical model2020

    • Author(s)
      Muhammad Qarinur, Sho Ogata, Tri Rahayu, Naoki Kinoshita and Hideaki Yasuhara
    • Organizer
      2nd International Conference on Coupled Processes in Fractured Geological Media: Observations, Modeling (CouFrac2020)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Prediction of permeability evolution in granite under the coupled THMC interactions with pH alteration2020

    • Author(s)
      S. Ogata, H. Yasuhara, N. Kinoshita, T. Inui, S. Mishima and K. Kishida
    • Organizer
      2nd International Conference on Coupled Processes in Fractured Geological Media: Observations, Modeling (CouFrac2020)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Coupled THMC coupling simulation for estimating the long-term evolution of rock permeability depending on groundwater chemistry2020

    • Author(s)
      Ogata, S., Yasuhara, H., Kinoshita, N., Kishida, K.
    • Organizer
      54th US Symp. on Rock Mechs./Geomechs
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Coupled THMC analysis for predicting hydro-mechanical evolution in siliceous mudstone2019

    • Author(s)
      Ogata, S., Yasuhara, H., Aoyagi, K., Kishida, K.
    • Organizer
      53rd US Symp. on Rock Mechs./Geomechs,
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Thermo-hydro-mechanical modeling to simulate Lahendong geothermal field2019

    • Author(s)
      Muhammad Qarinur, Hideaki Yasuhara, Naoki Kinoshita
    • Organizer
      The 7th Indonesia International Geothermal Convention & Exhibition (IIGCE) 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Numerical Investigation for Modeling Lahendong Geothermal Field, North Sulawesi2019

    • Author(s)
      Muhammad Qarinur, Hideaki Yasuhara, Naoki Kinoshita
    • Organizer
      The 5th ISRM Young Scholars’ Symposium on Rock Mechanics and International Symposium on Rock Engineering for Innovative Future
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development of multi-physics simulator by considering damage evolution due to mineral reactions in fractured rocks2019

    • Author(s)
      Sho Ogata, Hideaki Yasuhara and Kiyoshi Kishida
    • Organizer
      The 5th ISRM Young Scholars’ Symposium on Rock Mechanics and International Symposium on Rock Engineering for Innovative Future
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development of test apparatus using transient pulse method for rock permeability measurement2019

    • Author(s)
      Kohya Sumimoto, Hideaki Yasuhara, Naoki Kinoshita
    • Organizer
      The 5th ISRM Young Scholars’ Symposium on Rock Mechanics and International Symposium on Rock Engineering for Innovative Future
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Simulations of flow-through experiments using the granite fractures by THMC coupled model considering pH dependence2019

    • Author(s)
      Takeru Kumagai, Hideaki Yasuhara, Naoki Kinoshita, Sho Ogata
    • Organizer
      The 5th ISRM Young Scholars’ Symposium on Rock Mechanics and International Symposium on Rock Engineering for Innovative Future
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2024-01-30  

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