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Cavity expansion in cross‐anisotropic rock
Author(s) -
Kolymbas Dimitrios,
Wagner Peter,
Blioumi Anastasia
Publication year - 2010
Publication title -
international journal for numerical and analytical methods in geomechanics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.419
H-Index - 91
eISSN - 1096-9853
pISSN - 0363-9061
DOI - 10.1002/nag.998
Subject(s) - anisotropy , basis (linear algebra) , deformation (meteorology) , field (mathematics) , inverse , geology , mineralogy , geotechnical engineering , materials science , geometry , physics , mathematics , optics , composite material , pure mathematics
SUMMARY Schistous rock can be considered—in a first approximation—as cross‐anisotropic linear elastic material. The determination of the corresponding material constants on the basis of the laboratory investigation of rock samples often fails, as the extraction of appropriate cores proves to be unfeasible (the cores disintegrate if the schistosity is pronounced). In this paper a new method is presented to determine the material constants of a linear elastic cross‐anisotropic rock on the basis of cavity expansion field tests, e.g. with a radial jack. To this purpose, an analytic approximation for the deformation of a hydrostatically loaded cylindrical cavity in cross‐anisotropic rock is derived which serves to the inverse analysis of the material parameters. Copyright © 2010 John Wiley & Sons, Ltd.