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A Method of Determining In-situ Stress in Anisotropic Rock.

Authors
Becker-RM; Hooker-VE
Source
Trans SME AIME 1969 Dec; 244:436-445
Link
NIOSHTIC No.
10010062
Abstract
The evaluation of in situ rock stresses from measurements of the change in diameter of a borehole that is stress relieved by overcoring has become a common practice. Generally the stress evaluation has been based on isotropic relations whereas rock in varying degrees is anisotropic. A plane elasticity solution for a circular hole along one axis of an orthotropic medium has been adapted to evaluation of in situ stress. The necessary elastic parameters for this evaluation may conveniently be obtained from static tests on the overcore in conjunction with a consistent orthotropic thick-wall cylinder solution. The method and equations for the laboratory and field evaluations are summarized and illustrated.
Publication Date
19691201
Document Type
OP;
Fiscal Year
1970
NTIS Accession No.
NTIS Price
Identifying No.
OP 9-70
NIOSH Division
DRC;
Source Name
Trans. SME, AIME, V. 244, December 1969, PP. 436-445
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