FRACTURE STRESSES INDUCED BY ROCK SPLITTERS

To complement field experimentation in the use of mechanical rock splitters for rapid excavation, an analysis of the stress distribution around a hole was made by means of the Airy stress function for two assumed pressure distributions. These were chosen to simulate the probable pressure distribution caused by a rock splitter, i.e. by two feathers separated by a hydraulically activated wedge. An induced stress factor of 1.0 was obtained for an even function P sin2 theta, and of 1.65 for a Fourier series function. Results show that the design of feathers is a critical factor in determining the magnitude and distribution of stresses.(a) /TRRL/

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  • Corporate Authors:

    Pergamon Press, Incorporated

    Headington Hill Hall
    Oxford OX30BW,    
  • Authors:
    • Chollette, D
    • Clark, G B
    • Lehnhoff, T F
  • Publication Date: 1976-10

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Filing Info

  • Accession Number: 00149025
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Analytic
  • Files: ITRD, TRIS
  • Created Date: Jun 17 1977 12:00AM