Proceedings of the Rocscience International Conference (RIC 2023)

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Using a 3D Limiting Equilibrium Modelling Tool for Slope Stability in Weathered Rocks: A Case Study

Authors
Mustapha Seidu1, *, Peter Andrews2
1Goldfields Ghana Limited, Accra, Ghana
2Goldfields Australia PTY, Perth, WA, Australia
*Corresponding author. Email: mustapha.seidu@goldfields.com
Corresponding Author
Mustapha Seidu
Available Online 8 November 2023.
DOI
10.2991/978-94-6463-258-3_73How to use a DOI?
Keywords
Lima Kwesi Gap Pit; 3D Limiting equilibrium; Weak rock
Abstract

Using three-dimensional limit equilibrium analysis to evaluate open pit slope stability has become popular in the mining industry. These tools allow geotechnical engineers to accurately input actual rock slope conditions and material strengths and obtain results that reflect slope behaviour and stability. The Lima Kwasi Gap Pit is one of Abosso Goldfields Limited’s Paleoplacer satellite pits south of the Damang Pit Cut-Back (DPCB). It lies between the Kwesi and Lima North Pits. Deterministic and probabilistic analyses were conducted for slopes in weak rock materials using 3D Limiting Equilibrium Analysis. The Particle Swarm search method identified failure surfaces with low failure potential on both the east and west walls. The Factor of Safety (FoS) of 1.75 and Probability of Failure (PoF) of 9.2% from the analyses satisfy the design acceptance criteria for the mine. The study showed that 3D modelling tools could assist geotechnical engineers in accurately modelling ground conditions and material properties.

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_73How 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  - Mustapha Seidu
AU  - Peter Andrews
PY  - 2023
DA  - 2023/11/08
TI  - Using a 3D Limiting Equilibrium Modelling Tool for Slope Stability in Weathered Rocks: A Case Study
BT  - Proceedings of the Rocscience International Conference  (RIC 2023)
PB  - Atlantis Press
SP  - 790
EP  - 796
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-258-3_73
DO  - 10.2991/978-94-6463-258-3_73
ID  - Seidu2023
ER  -