| Title | Anisotropic properties study of Lac du Bonnet granite specimens: report #7 / Étude des propriétés d'anisotropie des échantillons de granite provenant de Lac du Bonnet : rapport #7 |
| Download | Downloads |
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| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Jackson, R |
| Source | Canada Centre for Mineral and Energy Technology, Mining Research Laboratories, Division Report 92-060 (TR), 1992, 75 pages, https://doi.org/10.4095/328602
 Open Access |
| Image |  |
| Year | 1992 |
| Publisher | Energy, Mines and Resources Canada |
| Document | serial |
| Lang. | English; French |
| Media | paper; on-line; digital |
| Related | This publication is related to the following
publications |
| File format | pdf |
| Province | Manitoba |
| NTS | 52L/04 |
| Area | Pinawa |
| Lat/Long WENS | -96.0000 -95.5000 50.2500 50.0000 |
| Subjects | engineering geology; Science and Technology; Nature and Environment; bedrock geology; lithology; igneous rocks; intrusive rocks; granites; intrusions; anisotropy; rock mechanics; deformation; boreholes;
rock stress analyses; stress patterns; shear stress; strain analysis; drilling; nuclear waste disposal; waste disposal sites; Lac du Bonnet Batholith |
| Illustrations | schematic representations; tables; plots |
| Released | 1992 03 01; 2021 07 14 |
| Abstract | Compressive and shear wave velocity measurements, as well as uniaxial compression testing, was conducted on samples obtained from borehole 406-010-S2 located in the Lac du Bonnet batholith near Pinawa,
Manitoba. The purpose of the study is to ascertain if any anisotropy in terms of the uniaxial mechanical properties exists in the Lac du Bonnet samples and, if so, to what extent.
The uniaxial, dilational and yield compressive strengths, 25 MPa,
40% and 50% tangent moduli and 40% and 50% Poisson's ratios exhibited maximum anisotropies of 1.34, 1.41, 1.53, 1.51, 1.59, 1.33, 1.38 and 1.22 respectively. Deformation anisotropies are related largely to the existence of micro-cracks in the
samples. Four hundred and twenty (420) level results indicated a higher degree of anisotropy in terms of the 50% tangent modulus of elasticity (1.51) than was indicated by a similar test series conducted on samples obtained from the 240 level (1.18).
Samples from the higher in situ stress field of the 420 level appear to be more profoundly effected by drilling, stress relaxation and the attendant crack formation and propagation. |
| GEOSCAN ID | 328602 |
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