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Analysis and modelling of holographic measurements of in situ stress

Smither, C. L. and Schmitt, D. R. and Ahrens, T. J. (1988) Analysis and modelling of holographic measurements of in situ stress. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts, 25 (6). pp. 353-362. ISSN 0148-9062. doi:10.1016/0148-9062(88)90975-8.

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Holographic in situ stress measurements were made at five azimuths at a single depth in a horizontal borehole in a mine pillar. For the first time, all six components of the stress tensor were determined by this technique. The stressmeter data indicate a vertical stress of −10.2MPa (compressive), in good agreement with the predicted vertical stress for the mine pillar depth and dimensions. The maximum horizontal stress is in ,an approximate E-W direction. The minimum principal stress is 3.2 MPa (tensile) and is oriented in an approximate N-S direction, along the axis of the borehole. The principal stresses are not strongly aligned in the horizontal and vertical directions relative to the borehole. Analysis of holographic stress data uses the analytic solution for displacements induced by drilling a small stress-relief hole in an infinite plate subjected to plane stress. Two-dimensional finite element analysis was conducted in order to compare the displacement of a thin plate to the displacements in a thicker body more closely resembling the situation in the borehole. The results suggest that the values of stress predicted by the current method of analysis may be overestimated for some states of stress of the borehole wall.

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Additional Information:© 1988 Pergamon Press plc. Received 21 April 1987; revised 13 January 1988 and 2 May 1988. We are grateful for the technical guidance in the use of the finite element code given by 8. Hager and S. King. Collaboration with B. Jensen in obtaining the holograms is appreciated. This research was supported by the U.S. Department of Energy, Schlumberger Technical Corp., and Sun Oil Company. Contribution 4438 of the Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California.
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Department of Energy (DOE)UNSPECIFIED
Schlumberger Technical Corp.UNSPECIFIED
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Caltech Division of Geological and Planetary Sciences4438
Issue or Number:6
Record Number:CaltechAUTHORS:20141103-080541722
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Official Citation:C.L. Smither, D.R. Schmitt, T.J. Ahrens, Analysis and modelling of holographic measurements of In Situ stress, International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, Volume 25, Issue 6, December 1988, Pages 353-362, ISSN 0148-9062, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:51151
Deposited By: Ruth Sustaita
Deposited On:03 Nov 2014 20:58
Last Modified:10 Nov 2021 19:06

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