Effects of Cementation on Hydraulic Conductivity and on Mechanical Strength of Binary Packing Systems

Viana, Lucimar Arruda; Lima, Dario Cardoso de; Costa, Liovando Marciano da; Silva, Claudio Henrique de Carvalho; Barbosa, Paulo; Costa, Weiner Gustavo Silva

doi:10.1590/1806-90882017000100006

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“…For this reason, research is being conducted to characterize and soil reinforcement, regardless of its engineering application. Today, a strong current of research is working to create optimal and sustainable engineering alternatives for soil reinforcement [25]- [34].…”

Section: Introductionmentioning

confidence: 99%

Construction Processes Paradigm and Reinforcement Alternatives for Tailings Dam Soil

Oliveira¹,

Campos²,

Branco³

et al. 2023

JEP

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In the last decade, Brazil was the scene of two of the world's biggest disasters related to mining tailings dams. The collapse of the Mariana and Brumadinho dams was catastrophic event that brought to light major environmental and humanitarian crises. Facts like this incite debate on the safety of dam construction methods and highlight the need for a broad discussion of dam safety legislation in the country. From the above, this paper promotes a review of various forms of construction of tailings dams and their associated problems, as well as discusses the techniques for soil reinforcement and their construction methods. The work also brings an overview of the Brazilian dams from April to July 2019, tracing the context of the Brazilian tailings dams months after the tragedy of Brumadinho. The methodology includes a robust literature review and discourse analysis. In Brazil, the number of ruptured dams is alarming, especially in the state of Minas Gerais, in which more than 7 have broken in the last two decades. Among the damages, the deaths impact society abruptly and were cataloged 455 deaths, of which 216 correspond to the rupture of the dam of the Córrego do Feijão mine in Brumadinho. To evaluate and diagnose a dam, one should consider ordinance N˚ 70,389, 2017 revoked by Resolution ANM n˚ 95, of February 7, 2022. In this context, in March 2019, we experienced several disturbing situations regarding dam instability in the state of Minas Gerais, being categorized as risky structures. To exemplify, one can cite dams classified as level 2 risk that became level 3.

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Section: Introductionmentioning

confidence: 99%