Proceedings of the Rocscience International Conference (RIC 2023)

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Stability Analysis of Hard Rock Pillars Under Compressive and Shear Loading Conditions Using 2D and 3D Numerical Modeling

Authors
Farzaneh Hamediazad1, Navid Bahrani1, *
1Department of Civil and Resource Engineering, Dalhousie University, Halifax, NS, Canada
*Corresponding author. Email: navid.bahrani@dal.ca
Corresponding Author
Navid Bahrani
Available Online 8 November 2023.
DOI
10.2991/978-94-6463-258-3_80How to use a DOI?
Keywords
Rib pillar; Pillar in shear; pillar stability; 3D numerical modeling
Abstract

Numerical modeling allows for investigating the stability of mine pillars under different loading conditions. Unfavorable shear stresses may develop within mine pillars when the orebody is inclined or when the pillar axes are not aligned with in-situ principal stress directions. Quirke Mine, ON, Canada, is a typical example of a mine that experienced a chain reaction of pillar failure due to adverse shear stresses. The rib pillars at this mine were initially laid out parallel to the dip direction of an inclined orebody. In the central part of this mine, the pillars were re-oriented at 45° to the orebody dip direction. These pillars failed due to unfavorable shear loading, causing the failure of those in compression. In this study, 3D models of Quirke Mine pillars were first generated in the 3D finite element program, RS3, and their elastic stresses were compared to those of 2D models. Furthermore, the influence of pillar size and orientation relative to the in-situ principal stress directions on pillar stability was assessed using the 3D boundary element program, EX3. The outcomes of this numerical study emphasize the importance of pillar orientation and orebody dip angle in pillar design.

Copyright
© 2023 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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Volume Title
Proceedings of the Rocscience International Conference (RIC 2023)
Series
Atlantis Highlights in Engineering
Publication Date
8 November 2023
ISBN
10.2991/978-94-6463-258-3_80
ISSN
2589-4943
DOI
10.2991/978-94-6463-258-3_80How to use a DOI?
Copyright
© 2023 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Cite this article

risenwbib
TY  - CONF
AU  - Farzaneh Hamediazad
AU  - Navid Bahrani
PY  - 2023
DA  - 2023/11/08
TI  - Stability Analysis of Hard Rock Pillars Under Compressive and Shear Loading Conditions Using 2D and 3D Numerical Modeling
BT  - Proceedings of the Rocscience International Conference  (RIC 2023)
PB  - Atlantis Press
SP  - 859
EP  - 869
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-258-3_80
DO  - 10.2991/978-94-6463-258-3_80
ID  - Hamediazad2023
ER  -