ANALYSIS OF THE BOREHOLE STRESS-RELIEF METHOD IN ROCKS WITH RHEOLOGICAL PROPERTIES

UNDER THE ASSUMPTION THAT ROCK BEHAVES AS A LINTER, HOMOGENEOUS, ISOTROPIC VISCOELASTIC SUBSTANCE, AN ANALYSIS OF THE BOREHOLE STRESS-RELIEF METHOD IS FORMULATED. SMALL STRAINS AND DISPLACEMENT THEORY ARE USED IN CONSIDERING THE INSTANTANEOUS ELASTIC AND SUBSEQUENT VISCOELASTIC RADIAL DISPLACEMENTS WHICH OCCUR IN A BOREHOLE AFTER DRILLING AND OVERCORING. FORMULAE ARE WRITTEN WHICH ALLOW ONE TO DETERMINE THE PRINCIPAL STRESSES AT A POINT INSIDE A ROCK MASS FROM MEASUREMENTS TAKEN AFTER OVERCORING. HOWEVER, THE LACK OF EXPERIMENTAL DATA DOES NOT YET PERMIT THE ESTIMATION OF THE DISCREPANCY IN THE VALUES OF THE PRINCIPAL STRESSES OBTAINED BY TAKING INTO ACCOUNT ONLY THE INSTANTANEOUS ELASTIC DISPLACEMENTS. /AUTHOR/

  • Availability:
  • Supplemental Notes:
    • Vol 5, No 2, PP 187-193
  • Authors:
    • Barla, G
    • Wane, M T
  • Publication Date: 0

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  • Accession Number: 00229606
  • Record Type: Publication
  • Source Agency: Geophysical Abstracts
  • Files: TRIS
  • Created Date: Aug 15 2004 2:39AM