Studies on Crack Propagation Resistance of Rocks Based on Hydrofrac Data of Large Specimens

  • H. Abé
  • K. Hayashi
  • T. Hashida
Conference paper

Abstract

The crack propagation resistance of rock, which is independent of the size of the crack for large cracks, was determined by analyzing results of the hydraulic fracturing experiments using the 10 m sized granite specimen at a quarry in Fukushima Prefecture, Japan. The method of analysis was the modified BEM, where the crack was assumed to be expanding as a semi-elliptical crack such that the stress intensity factor was approximately constant along its periphery. It was found that the crack propagation resistance of the granite being independent of crack size is 1.93 MPa·m1/2.

Keywords

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References

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    H. Takahashi, T. Shoji and H. Abé, Recent Progress and Future of “Γ” Project at Tohoku University, Japan, EEC/US Workshop on HDR, Brussels, May 28–30, 1986.Google Scholar
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    T. Hashida, Fracture Toughness Determination of Rock and Extension Behavior of Hydraulically Created Crack, (in Japanese), Doctoral Thesis, Tohoku University, 1984.Google Scholar
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    H. Abé, K. Hayashi and S. Takahashi, Stress Intensity Factors for an Embedded Elliptical Crack near a Cylindrical Cavity, (in Japanese), Trans. JSME, A 5–465 (1985), 1350–1358.Google Scholar
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    M. P. Wnuk, Trans. ASME, J. Appl. Mech., 48 (1981), 500–508.MATHCrossRefGoogle Scholar

Copyright information

© Springer-Verlag New York Inc. 1989

Authors and Affiliations

  • H. Abé
    • 1
  • K. Hayashi
    • 2
  • T. Hashida
    • 1
  1. 1.Faculty of EngineeringTohoku UniversitySendaiJapan
  2. 2.Institute of High Speed MechanicsTohoku UniversitySendaiJapan

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