COMPARATIVE STUDY OF THE ASSUMPTION IN DETERMINING SECONDARY PRINCIPAL STRESSES IN A ROCK MASS

THE EFFECT OF DIFFERENT ASSUMPTIONS IN THE DETERMINATION OF SECONDARY PRINCIPAL STRESSES IS DISCUSSED IN THIS PAPER. FOR A KNOWN THREE DIMENSIONAL STATE OF STRESS, THE TRUE THEORETICAL VALUES OF SECONDARY PRINCIPAL STRESSES AND DISPLACEMENTS IN A PLANE PERPENDICULAR TO THE BOREHOLE AXIS ARE CALCULATED FROM THE THEORY OF ELASTICITY. WITH THE DISPLACEMENTS AS KNOWN QUANTITIES, THE SECONDARY PRINCIPAL STRESSES ARE RECOMPUTED FOR FIVE COMMONLY USED ASSUMPTIONS OF PRINCIPAL STRESS DIRECTION AND MAGNITUDE OF NORMAL STRESS ALONG THE BOREHOLE AXIS. THE COMPUTED VALUES ARE COMPARED WITH THE TRUE THEORETICAL VALUES. THE ANALYSIS IS CARRIED OUT FOR SEVERAL POSSIBLE STATES OF STRESS IN THE EARTH CRUST AND FOR EACH STATE ALL BOREHOLE ORIENTATIONS ALONG 30 DEGREE INTERVALS OF LONGITUDE AND LATITUDE ARE CONSIDERED. IT IS REVEALED THAT THE CALCULATED VALUES FOR THE MAGNITUDES AND DIRECTIONS OF THE SECONDARY PRINCIPAL STRESSES DIFFER SIGNIFICANTLY FROM THE TRUE VALUES OF THE SECONDARY PRINCIPAL STRESSES, THE DEVIATIONS DEPENDING ON THE UNDERLYING ASSUMPTIONS. /AUTHOR/

  • Supplemental Notes:
    • Vol 2, No 4-3, PP 397-401, 2 FIG, 8 TAB, 4 REF
  • Authors:
    • Agarwal, R K
  • Publication Date: 1970

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Filing Info

  • Accession Number: 00236195
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 22 1972 12:00AM