QUASI-STATIC AND DYNAMIC RESPONSE OF LARGE SCALE ROCK JOINTS. LARGE ROCK CAVERNS - PROCEEDINGS OF THE INTERNATIONAL SYMPOSIUM, HELSINKI, FINLAND, 25-28 AUGUST 1986. VOLUME 2

Response of large blocks of rocks with simulated joints were investigated under quasi-static and dynamic loading conditions. For the quasi-static tests, flatjacks with an effective area of about 1 sq m were placed on four inner sides of a large biaxial loading frame to simulate the biaxial stress field. For the dynamic tests, an actuator with capacity of about 4448 kN was used to simulate the dynamic event. The tests were conducted on large artifically fractured blocks of sandstone, granite, tuff, hydrostone, and concrete. Prior to testing, the fractured surface of each block was characterized using the Barton jrc-jcs concept. The results of characterization were used to generate the peak shear strength envelope for each fracture surface. The overall results of the experimental investigation were used to develop a model for predicting shear strength of fractures, corrected for dilation and boundary condition effects. The corrected shear strength model was used to design a rock bolt scheme to prevent the mobilization of shear event for the dynamic cases considered in this study. For the covering abstract of the symposium see IRRD 810647. (Author/TRRL)

  • Availability:
  • Corporate Authors:

    Pergamon Press, Incorporated

    Headington Hill Hall
    Oxford OX30BW,    
  • Authors:
    • Bakhtar, K
  • Publication Date: 1987

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  • Accession Number: 00476301
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 0-08-034078-4
  • Files: ITRD, TRIS
  • Created Date: Sep 30 1988 12:00AM