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Temporal changes in broad-band wave attenuation and velocity of fracturing rock samples

Research Project

Project/Area Number 19740280
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field Solid earth and planetary physics
Research InstitutionRitsumeikan University

Principal Investigator

KAWAKATA Hironori  Ritsumeikan University, 理工学部, 准教授 (80346056)

Project Period (FY) 2007 – 2008
Project Status Completed (Fiscal Year 2008)
Budget Amount *help
¥3,480,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥180,000)
Fiscal Year 2008: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2007: ¥2,700,000 (Direct Cost: ¥2,700,000)
Keywordsアコースティック=エミッション / 弾性波速度 / 弾性波減衰 / 岩石破壊試験 / 広帯域計測 / 三軸圧縮破壊 / 広帯域弾性波測定用センサー / 破壊成長 / 弾性波計測
Research Abstract

岩石試料を用いた三軸圧縮破壊試験において,広帯域弾性波測定用センサーを用いて,破壊の成長にともなう弾性波伝播特性の変化についてしらべた.破壊の進展につれて,圧縮軸方向に透過するP波の速度は緩やかに低下し続け,振幅のみが急激に低下することが明らかにされた.本研究にて初めて実現された周波数解析からは,比較的高い周波数帯と低い周波数帯でのみ振幅の減少が認められたが,速度の逆数に相当する遅れ時間は徐々に増大するものの顕著な周波数依存性は認められなかった.

Report

(3 results)
  • 2008 Annual Research Report   Final Research Report ( PDF )
  • 2007 Annual Research Report
  • Research Products

    (11 results)

All 2009 2008 2007 Other

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (10 results)

  • [Journal Article] Broadband P waves transmitting through fracturing Westerly granite before and after the peak stress under a triaxial compressive condition,

    • Author(s)
      N. Yoshimitsu, H. Kawakata, N. Takahashi
    • Journal Title

      Earth Planets and Space (掲載決定)

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Presentation] A new system of broad-band elastic wave measurement in laboratory under triaxial compressive conditions2009

    • Author(s)
      H. Kawakata, N. Takahashi, N. Yoshimitsu, M. Takahashi
    • Organizer
      IASPEI 2009 Meeting
    • Place of Presentation
      Cape Town, South Africa
    • Year and Date
      2009-01-14
    • Related Report
      2008 Final Research Report
  • [Presentation] A new system of broad-band elastic wave measurement in laboratory under triaxial compressive conditions2009

    • Author(s)
      Hironori Kawakata, et.al.
    • Organizer
      IASPEI General Assembly 2009
    • Place of Presentation
      Cape Town, South Africa
    • Year and Date
      2009-01-14
    • Related Report
      2008 Annual Research Report
  • [Presentation] 広帯域センサーを用いた岩石の破壊成長にともなう弾性波速度の変化2009

    • Author(s)
      川方裕則, 他
    • Organizer
      地球惑星科学関連学会連合大会
    • Place of Presentation
      千葉
    • Related Report
      2008 Annual Research Report
  • [Presentation] Frequency dependent change in amplitude of elastic wave transmitting through fracturing Westerly granite2008

    • Author(s)
      N. Yoshimitsu, H. Kawakata, N. Takahashi,
    • Organizer
      7th ASC General Assembly and SSJ 2008 Fall Meeting
    • Place of Presentation
      Ibaraki, Japan
    • Year and Date
      2008-11-26
    • Related Report
      2008 Final Research Report
  • [Presentation] Fault structure in Westerly granite samples extracted using a micro-focus X-ray CT scanning system2008

    • Author(s)
      T. Okuno, H. Kawakata, N. Takahashi, M.
    • Organizer
      7th ASC General Assembly and SSJ 2008 Fall Meeting
    • Place of Presentation
      Ibaraki, Japan
    • Year and Date
      2008-11-26
    • Related Report
      2008 Final Research Report
  • [Presentation] Frequency dependent change in amplitude of elastic wave transmitting through fracturing Westerly granite2008

    • Author(s)
      Nana Yoshimitsu, Hironori Kawakata, et.al.
    • Organizer
      7th General Assembly of Asian Seismological Commission
    • Place of Presentation
      Ibaraki, Japan
    • Year and Date
      2008-11-26
    • Related Report
      2008 Annual Research Report
  • [Presentation] Fault structure in Westerly granite samples extracted using a micro-focus X-ray CT scanning system2008

    • Author(s)
      Takaya Okuno, Hironori Kawakata, et.al.
    • Organizer
      7th General Assembly of Asian Seismological Commission
    • Place of Presentation
      Ibaraki, Japan
    • Year and Date
      2008-11-26
    • Related Report
      2008 Annual Research Report
  • [Presentation] 広帯域センサーを用いた岩石の破壊成長にともなう弾性波速度の変化2008

    • Author(s)
      川方裕則, 高橋直樹, 吉光奈奈
    • Organizer
      地球惑星科学連合大会
    • Place of Presentation
      千葉
    • Year and Date
      2008-05-25
    • Related Report
      2008 Final Research Report
  • [Presentation] 岩石破壊時における透過P波のコヒーレンスと位相の時間変2008

    • Author(s)
      吉光奈奈, 川方裕則, 高橋直樹
    • Organizer
      日本地球惑星科学連合大会
    • Place of Presentation
      千葉
    • Year and Date
      2008-05-18
    • Related Report
      2008 Final Research Report
  • [Presentation] 震源核形成・成長に伴うAEの波形変化をとらえる試み(3)-AEの破壊形態-2007

    • Author(s)
      川方裕則・他4名
    • Organizer
      日本地震学会
    • Place of Presentation
      宮城県・仙台国際センター
    • Year and Date
      2007-10-25
    • Related Report
      2007 Annual Research Report

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Published: 2007-04-01   Modified: 2016-04-21  

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