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A Study on the Methods for Measuring In-situ Stresses at Great Depth by Use of Boring Cores

Research Project

Project/Area Number 02805076
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 資源開発工学
Research InstitutionTohoku University

Principal Investigator

MATSUKI Koji  Tokoku Univ., Dept. of Resorces Engineering, Assoc. Prof., 工学部, 助教授 (10108475)

Co-Investigator(Kenkyū-buntansha) OKUMURA Kiyohiko  Tokoku Univ., Dept. of Resorces Engng, Technical Official, 工学部, 文部技官 (40177184)
KOJIMA Takashi  Tokoku Univ., Dept. of Resorces Engng, Research Associate, 工学部, 助手 (20192057)
SUZUKI Shunichi  Tokoku Univ., Dept. of Resorces Engineering, Prof., 工学部, 教授 (80005214)
Project Period (FY) 1990 – 1991
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 1991: ¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 1990: ¥1,200,000 (Direct Cost: ¥1,200,000)
KeywordsIn-situ Stress Measurement at Great Depth / Rock Core / Anelastic Strain Recovery Method / Differential Strain Analysis Method / コアの損傷 / 非弾性ひずみ回復コンプライアンス
Research Abstract

Anelastic strain recovery method (ASR method) and differential strain analysis method (DSA method) have been theoretically and experimentally investigated in order to enhance the reliability of the methods for measuring in-situ stresses at great depth. The main results obtained in this study were summarized as follows :
1. ASR method
(1) Anelastic strain recovery compliance (ASRC) ranges widely depending on the rock type. The ASRC in shear mode is greater than that in volumetric mode.
(2) The ASRC of rocks depends on the mean stress. The mean stress increases the ASRC in shear mode and decreases that in volumetric mode.
(3) A method for measuring three-dimensional in-situ stresses from anelastic strain recovery of a rock core has been proposed without assumptions except that the rock is isotropic and visco-elastic material.
(4) The directions of principal in-situ stresses and the ratio of principal stress deviations in Yunomori district, Iwate Prefecture, have been successfully measured with the method developed in this study.
2. DSA method
(1) The physical Meaning of the crack parameters used in DSA method for measuring in-situ stresses have been clarified by theoretical consideration.
(2) A testing system, whose main component is a pressure vessel of the capacity of 180 MPa, was constructed and the standard testing procedure for differential strain analysis has been established.
(3) In-situ stresses have been evaluated by DSA method for the boring cores which were taken by over-coring technique for measuring in-situ stresses. The results from DSA method were not always consistent with those from over-coring methods.
(4) The increase of crack parameters due to uniaxial tensile stress is not large enough compared to that measured by DSA for the rock speciments from in-situ. This suggests that the inconsistency described above is due to pre-existing cracks in the specimens.

Report

(3 results)
  • 1991 Annual Research Report   Final Research Report Summary
  • 1990 Annual Research Report
  • Research Products

    (22 results)

All Other

All Publications (22 results)

  • [Publications] 松木 浩二: "岩石の非弾性ひずみ回復特性と三次元地圧計測法" 第8回岩の力学国内シンポジウム講演論文集. 297-302 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 志水 俊仁: "DSAによる地圧計測法について" 資源・素材学会平成3年度研究発表講演要旨集. 311-312 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Koji MATSUKI: "Three-dimensional in-siter stress measarement with anelastic strain recovery of a rock core" Proc.of 7th Int.Congr.on Rock Mechamics. 557-560 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 松木 浩二: "コアを用いた地圧計測法の現状と展望" コアを用いた地圧計測ワ-クションプ論文集. 1-7 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 松木 浩二: "岩石非弾性ひずみ回復を用いた三次元地圧計測法の理論的検討" 資源・素材学会誌. 108. 41-45 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 松木 浩二: "ASR法およびDSA法による岩手県湯ノ森地域の地圧計測" 資源・素材学会平成4年度研究発表講演要旨集. (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Matsuki, K.: "Anelastic strain recovery of rocks and three-dimensional in-situ stress measurement (in Japanese)" Proc. of 8th Japan Sympo. on Rock Mechanics. 297-302 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Shimizu, T. et al.: "On DSA method for measuring in-situ stresses (in Japanese)" Proc. of Spring Meeting of MMIJ. 311-312 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Matsuki, K.: "Three-dimensional in-situ stress measurement with anelastic strain recovery of a rock core" Proc. of 7th Int. Congr. on Rock Mechanics. 557-560 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Matsuki, K.: "Status and outlook of core-based methos for measuring in-situ stresses (in Japanese)" Proc. of Work Shop on Core Tests for In-situ Stress Evaluation. 1-7 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Matsuki, K.: "Three-dimensional in-situ stress measurement with anelastic strain recovery method (in Japanese)" Proc. of Work Shop on Core Tests for In-situ Stress Evaluation. 41-45 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Matsuki, K.: "Theoretical examination of the method for measuring three-dimensional in-situ stresses with anelastic strain recouery of rock (in Japanese)" J. of MMIJ. 108 No. 1. 41-45 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Matsuki, K. et al.: "In-situ stress measurements at Yunomori district, Iwate Pref., with ASR and DSA methods (in Japanese)" Proc. of Spring Meeting of MMIJ. (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 松木 浩二: "岩石の非弾性ひずみ回復特性と三次元地圧計測法" 第8回岩の力学国内シンポジウム講演論文集. 297-302 (1990)

    • Related Report
      1991 Annual Research Report
  • [Publications] 志水 俊仁: "DSAによる地圧計測法について" 資源・素材学会平成3年度研究発表講演要旨集. 311-312 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Koji MATSUKI: "Threeーdimensional inーsita stress measurement with anelastic strain recovery of a rock core" Proc.of 7th.Int.Congr.on Rock Mechanics. 557-560 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 松木 浩二: "コアを用いた地圧計測法の現状と展望" コアを用いた地圧計測ワ-クショップ論文集. 1-7 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 松木 浩二: "岩石の非弾性ひずみ回復を用いた三次元地圧計測法の理論的検討" 資源・素材学会誌. 108. 41-45 (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] 松木 浩二: "ASR法およびDSA法による岩手県湯ノ森地域の地圧計測" 資源・素材学会平成4年度研究発表講演要旨集. (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] 松木 浩二: "岩石の非弾性ひずみ回復特性と三次元地圧計測法" 第8回岩の力学国内シンポジウム講演論文集. 297-302 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 志水 俊仁: "DSAによる地圧計測法について" 資源・素材学会平成3年度研究発表講演要旨集. (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] Koji MATSUKI: "Threeーdinensional inーsitu stress measurement with anelastic strain recovery of a rock core" Proc.of 7th Int.Congr.on Rock Mechanics. (1991)

    • Related Report
      1990 Annual Research Report

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Published: 1990-04-01   Modified: 2016-04-21  

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