Proceedings of the TMIC 2022 Slope Stability Conference (TMIC 2022)

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Tailings Dam’s Safety Assessment Considering Undrained Foundation Failure

Authors
Flávia Augusta Padovani1, Thiago Bretas2, *
1BVP Geotecnia e Hidrotecnia, Belo Horizonte, MG, Brazil
2TBretas Consultoria, Belo Horizonte, MG, Brazil
*Corresponding author. Email: tbretas@tbretas.com
Corresponding Author
Thiago Bretas
Available Online 1 March 2023.
DOI
10.2991/978-94-6463-104-3_5How to use a DOI?
Abstract

During construction and raising phases of tailings dams, excess pore pressures and localized deformations (plasticization zones) may develop due to applied overloads. Therefore, it can develop an undrained shearing in contractile materials, as tailings and foundation soils. In this case, the design of these structures must consider, in its studies, the failure by undrained shearing of the foundation as a potential trigger for static liquefaction of tailings. In Brazil, National Mining Agency - Resolution No. 13 set a minimum safety factor equal to 1.3 for stability analyzes and studies of liquefaction susceptibility considering peak undrained shear strength. In this context, the present work aims to present the safety assessment of a hypothetical tailing dam, for an undrained scenario (which was considered even for the foundation), in view of the main consolidated methodologies in the geotechnical community, for shear resistance parameters estimation. The stability analyses were developed in 2-D and 3-D, by limit equilibrium method. The results indicated overestimated factors of safety when considering effective strength parameters for the foundation, reinforcing the importance of carefully evaluating the type of mechanical behavior of soils under shearing.

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 TMIC 2022 Slope Stability Conference (TMIC 2022)
Series
Atlantis Highlights in Engineering
Publication Date
1 March 2023
ISBN
10.2991/978-94-6463-104-3_5
ISSN
2589-4943
DOI
10.2991/978-94-6463-104-3_5How 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  - Flávia Augusta Padovani
AU  - Thiago Bretas
PY  - 2023
DA  - 2023/03/01
TI  - Tailings Dam’s Safety Assessment Considering Undrained Foundation Failure
BT  - Proceedings of the TMIC 2022 Slope Stability Conference (TMIC 2022)
PB  - Atlantis Press
SP  - 44
EP  - 52
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-104-3_5
DO  - 10.2991/978-94-6463-104-3_5
ID  - Padovani2023
ER  -