DETERMINATION OF PERMEABILITY IN ANISOTROPIC ROCK-MASSES FROM INTEGRAL SAMPLES

A method is presented which makes it possible to characterize the permeability of a rock mass as an anisotropic magnitude--i.e. to determine its permeability tensor--from a characterization of its fracturing by means of intergral samples. For the purpose, a theory is developed by means of which the permeability tensor can be calculated from the attitudes and openings of the fractures and--if infillings are present--also from their coefficient of permeability. All these magnitudes are determined in integral samples it being assumed that the sampled fractures are continuous and plane, and have the same characteristics as the section of the fractures present in the samples. Possible deviations with respect to this assumption are taken into account by means of correcting factors derived from the results of pressure tests in situ. The permeability tensor of a rock mass at a point can be determined from a single integral sample, provided this is representative of the fracturing. Results of the application of the method are presented, which show it to look very promising. /Author/

  • Corporate Authors:

    Laboratorio Nacional de Engenharia Civil

    Avendia do Brazil
    Lisbon 5,   Portugal 
  • Authors:
    • Rocha, M
    • Franciss, F
  • Publication Date: 1978

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Filing Info

  • Accession Number: 00188226
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Mar 28 1979 12:00AM