Numerical investigation of the effect of joint geometrical parameters on the mechanical properties of a non-persistent jointed rock mass under uniaxial compression

Bahaaddini, M., Sharrock, G. B and Hebblewhite, B. K. (2013) Numerical investigation of the effect of joint geometrical parameters on the mechanical properties of a non-persistent jointed rock mass under uniaxial compression. Computers and Geotechnics, 49 206-225. doi:10.1016/j.compgeo.2012.10.012


Author Bahaaddini, M.
Sharrock, G. B
Hebblewhite, B. K.
Title Numerical investigation of the effect of joint geometrical parameters on the mechanical properties of a non-persistent jointed rock mass under uniaxial compression
Journal name Computers and Geotechnics   Check publisher's open access policy
ISSN 0266-352X
1873-7633
Publication date 2013-04-01
Year available 2012
Sub-type Article (original research)
DOI 10.1016/j.compgeo.2012.10.012
Volume 49
Start page 206
End page 225
Total pages 20
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon
Language eng
Abstract The strength and deformability of rock masses transected by non-persistent joints are controlled by complex interactions of joints and intact rock bridges. The emergence of synthetic rock mass (SRM) numerical modelling offers a promising approach to the analysis of rock masses, but has not been rigorously compared with actual physical experiments. In this work, SRM modelling by the discrete element software PFC3D is used to investigate the effect of geometric parameters of joints on the rock mass failure mechanism, unconfined compressive strength and deformation modulus. Firstly, a validation study is undertaken to investigate the ability of SRM modelling to reproduce rock mass failure modes and strength as determined by uniaxial and biaxial compression testing in the laboratory. The numerical analyses agree well with physical experimentation at low confining pressure. A sensitivity study is then undertaken of the effect of joint configuration parameters on the failure mode, unconfined compressive strength and deformation modulus of the rock mass. Five failure modes are predicted to occur: intact rock, planar, block rotation, step-path and semi-block generation. It is found that the failure mode is determined principally by joint orientation and step angle and the joint orientation with respect to principal stress direction is the parameter with the greatest influence on rock mass properties
Keyword Rock mass strength
Rock mass deformation modulus
Failure mode
Synthetic rock mass modelling
PFC3D
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: W.H. Bryan Mining Geology Research Centre
Non HERDC
 
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Citation counts: TR Web of Science Citation Count  Cited 49 times in Thomson Reuters Web of Science Article | Citations
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Created: Wed, 26 Mar 2014, 20:00:01 EST by Diep Tran on behalf of WH Bryan Mining and Geology Centre