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Rock Stress Determinations from Overcoring: An Overview.


PB94108826

Publication Date 1993
Page Count 182
Abstract The bulletin describes the U.S. Bureau of Mines three-component borehole deformation gage and the overcoring techniques used in rock stress determination. Thirty years of experience with the borehole gage has shown that it is an accurate instrument for measuring deformation of a borehole. The theoretical basis relating the deformation of a borehole to the in situ field stress is presented. Rock anisotropy, variation of topography on the stress field, and nonlinearity of the rock can be accounted for in calculating the in situ state of stress. A comparison of alternative methods for determining the absolute in situ field stress is also presented.
Keywords
  • Underground mining
  • Rock mechanics
  • Overburden
  • Stress concentration
  • Coring
  • Computer applications
Source Agency
  • Bureau of Mines
NTIS Subject Category
  • 48A - Mineral Industries
  • 50D - Soil & Rock Mechanics
Corporate Authors Bureau of Mines, Denver, CO. Denver Research Center.
Supplemental Notes Library of Congress catalog card no. 92-26919.
Document Type Technical Report
Title Note Bulletin.
NTIS Issue Number 199402
Rock Stress Determinations from Overcoring: An Overview.
Rock Stress Determinations from Overcoring: An Overview.
PB94108826

  • Underground mining
  • Rock mechanics
  • Overburden
  • Stress concentration
  • Coring
  • Computer applications
  • Bureau of Mines
  • 48A - Mineral Industries
  • 50D - Soil & Rock Mechanics
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