Proceedings of the Rocscience International Conference (RIC 2023)

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Searching for the 3D Critical Slip Surface in an Open Pit Mine Using Spline Surfaces

Authors
Terence Ma1, *, Sina Javankhoshdel1, Brigid Cami1, Reginald E. Hammah1, Brent Corkum1
1Rocscience, Toronto, ON, M5T1V1, Canada
*Corresponding author. Email: terence.ma@rocscience.com
Corresponding Author
Terence Ma
Available Online 8 November 2023.
DOI
10.2991/978-94-6463-258-3_39How to use a DOI?
Keywords
spline; search; limit equilibrium; slope stability; optimization; factor of safety; open pit; NURBS
Abstract

The use of software for 3D slope stability is becoming increasingly popular due to advances in computing technology. Though slip surfaces in slope stability are rarely circular in nature, many modern practitioners still rely on limit equilibrium results using spherical or ellipsoidal slip surfaces. Restricting slip surfaces to the spherical or ellipsoidal domain can lead to un-conservative results due to inflexibility of the slip surface during optimization. As the technology for identifying critical slips in slopes continues to improve, a new method which optimizes the shape of a slip surface using flexible splines in 3D was recently proposed. The method is applied in this paper towards the analysis of an open pit mine. Some simplification steps for complex models are presented which are recommended to be taken during the modelling procedure to increase the speed of searching for the critical slip surface and filter out unnecessary entities in the analysis, such as near-vertical weak layers and weak layers with reverse curvature.

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
978-94-6463-258-3
ISSN
2589-4943
DOI
10.2991/978-94-6463-258-3_39How 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  - Terence Ma
AU  - Sina Javankhoshdel
AU  - Brigid Cami
AU  - Reginald E. Hammah
AU  - Brent Corkum
PY  - 2023
DA  - 2023/11/08
TI  - Searching for the 3D Critical Slip Surface in an Open Pit Mine Using Spline Surfaces
BT  - Proceedings of the Rocscience International Conference  (RIC 2023)
PB  - Atlantis Press
SP  - 385
EP  - 395
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-258-3_39
DO  - 10.2991/978-94-6463-258-3_39
ID  - Ma2023
ER  -