Analysis of accuracy in the determination of the ground-stress tensor by means of borehole devices / W.M. Gray and N.A. Toews, Mining Research Centre.: M38-8/109E-PDF
“The determination of the state of stress existing at a point in any solid body requires the determination of the six components of the stress tensor relative to a convenient set of axes. One general method of doing this in rock is to make strain or deformation measurements associated with local relief of stress in a number of boreholes penetrating a limited volume in the vicinity of the point at which the stress is to be determined. The stress is assumed to be constant throughout this volume. Leeman has described a number of the instruments that have been developed for making deformation or strain measurements in boreholes. Panek has described the application of statistical methods to the determination of the average components of ground stress from sets of measurements made in boreholes by means of deformation meters of the type developed by the U.S. Bureau of Mines. In this paper attention is given initially to the strain cell developed for use on the flattened ends of boreholes by the Council for Scientific and Industrial Research (CSIR), South Africa. The equations required for evaluating the average components of ground stress from measurements made by means of the CSIR strain cell are derived. These equations are similar in form to those applying to measurements made by the borehole deformation meter developed by the U.S. Bureau of Mines. The results of an investigation of the properties of the equations are described. These results are important in the practical use of both the instruments mentioned above and any instrument based on similar principles"--p. 45.
Permanent link to this Catalogue record:
|Department/Agency|| Canada. Natural Resources Canada. |
Canada.Dept. of Energy, Mines and Resources.
Canada. Mines Branch.
|Title||Analysis of accuracy in the determination of the ground-stress tensor by means of borehole devices / W.M. Gray and N.A. Toews, Mining Research Centre.|
|Series title||Reprint series ; RS 109|
|Publication type||Series - View Master Record|
|Electronic document|| |
Archived information is provided for reference, research or recordkeeping purposes. It is not subject to the Government of Canada Web Standards and has not been altered or updated since it was archived. Please contact the authoring department to request a format other than those available.
Note: The URLs contained in this/these document(s) may no longer be functionalHaving trouble opening this document?
|Note(s)|| Cover title. |
"Reprinted from Proceedings of the Ninth Symposium on Rock Mechanics held at the Colorado School of Mines, Golden, Colorado, 17-19 April, 1967, chapter 3, pp. 45-78."
Historical publication digitized from print 2017 [by Natural Resources Canada].
Includes bibliographical references.
|Publishing information||Ottawa : Information Canada, 1972.|
|Author / Contributor|| Gray, W. M. |
Toews, N. A.
|Catalogue number|| |
|Departmental catalogue number||300188|
|Subject terms||Mining industry, Rocks, Physics|
- Date modified: