EXCLUSIVE Final settlement for Brazil's Samarco dam disaster
A definitive settlement with miner Samarco and owners, BHP Group (BHP.AX) and Vale SA (VALE3.SA), for the damage caused by a burst tailings dam in 2015 could reach 100 billion reais ($19.06 ...
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An insight into failure of iron ore mine tailings dams
In the past, many failures of these iron ore mine tailings storage facilities/dams have been reported worldwide in different forms. In this paper, an attempt has been made to review the failure modes, mechanisms and possible solutions to enhance the stability and safety of iron ore tailings dams. A comprehensive investigation has been carried ...
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Environmental Risks From Mine Tailings
Tailings are a type of rock waste from the mining industry. When a mineral product is mined, the valuable portion is usually embedded in a rock matrix called ore.
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Brumadinho Dam Collapse: Outlook and Policy Objectives
On January 25th, a tailings dam in the Córrego do Feijão iron ore mine near the small town of Brumandinho, Minas Gerais collapsed. A wave of mud flooded the region covering houses and businesses, and inevitably people and animals. One month after the incident, the official death toll is at 186 individuals, although over a hundred are still ...
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Catastrophic tailings dam failures and disaster risk disclosure
The catastrophic collapse in January 2019 of the tailings dam at the Córrego do Feijão iron ore mine in the town of Brumadinho in the Brazilian state of Minas Gerais is one of the most recent. By April 2019, more than 230 people had been confirmed dead and large sections of agricultural land totally destroyed [41 ].
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Technical Report: Design and Evaluation of Tailings Dams
While this report discusses general features of tailings dams and impoundments, actual designs for tailings disposal are highly site-specific. Design depends on the quantity …
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Technical Report: Design and Evaluation of Tailings Dams
Design and Evaluation of Tailings Dams 2 More recently, concerns have been raised about the stability and environmental performance of tailings dams and impoundments. Stability concerns are raised in part by the use of tailings material in tailings dams/embankments; to mitigate these concerns, such embankments often rely on a certain amount of
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Dewatered and Stacked Mine Tailings: A Review | ACS ES&T …
Tailings storage is a prescient issue in mining, representing a visible and destructive liability. Dewatering tailings to a paste-like consistency is a popular option to reduce tailings volumes and increase dam safety, but dewatering further to a bulk cake consistency has mostly been reserved for small operations in locations where seismicity …
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Electrical Resistivity Imaging Applied to Tailings Ponds: An …
Geophysical methods based on electrical properties can be used to study tailings ponds studies because a site's spatial and temporal subsurface electrical resistivity values vary depending on its physical and chemical properties (texture, salinity, metals, water content, temperature, pH, etc.). This paper reviews published case studies in …
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Dams
Mining. Iron ore is present in the solutions that transform people's lives, contributing to the evolution of society. ... a dyke is constructed in order to contain the iron ore tailings. This is the starter dam. As the dam continues to receive more tailings, new layers are built onto the starter dam - an operation that is referred to as raising ...
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Expansion of Ecuador mine risks 'imminent' collapse of waste dam
The tailings dam is part of one of Ecuador's biggest mining projects, El Mirador, which holds an estimated 3.2 million metric tons of copper, 3.4 million ounces of gold and 27.1 million ounces ...
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Tailings dams failure risks range from high to extreme in audits by
Four extreme-risk BHP tailings dams located at the Olympic Dam mine (SA), Whaleback iron ore mine (SA), Pilbara mine (WA), and the Leinster mine (WA) Two high-risk dams inside Rio Tinto's Andoom ...
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Brazil dam disaster: firm knew of potential impact months in …
When the Fundão tailings dam failed on 5 November 2015, it unleashed about 40m litres of water and sediment from iron ore extraction in a wave that polluted the water supply for hundreds of ...
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(PDF) Iron Ore Tailings: Characterization and Applications
Currently, approximately 1.4 billion tons per year of iron ore tailing wastes (IOT) are generated, mainly in Australia, Brazil, and China. This work describes the …
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What are tailings dams? | IndustriALL
Tailings dams are used to store water and waste that come as by products from the mining process. It is estimated there are at least 3,500 tailings dams around the world. But as there are around 30,000 industrial mines, the number of tailings dams is likely to be much higher. Tailings dams can be huge in size, as big as lakes, and reach …
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Brazil's deadly dam disaster in Brumadinho was preventable
The main objective was to create specific legislation on safety of mining tailings dams. Four points were considered essential for the legislation to bring changes to the industry. First, the ...
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Geochemistry and mineralogy of auriferous tailings deposits
The content of Au feed from current mines varies from 5 ppm to 1, depending on each mine 1 The tailings dams 4 and 5 are downstream, monitored and declared safe according to the national mining ...
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A counting of tailings in Canada
On Jan. 25, 2019, a tailings dam at Vale's Córrego do Feijão iron ore mine in Minas Gerais, Brazil, failed, releasing 12 million cubic metres of tailings and killing 259 people with 11 still missing and presumed dead. Several senior managers at Vale were arrested, alongside two engineers from German company TÜV Süd who were …
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What are tailings storage facilities | BHP
Tailings are the left-over materials from the processing of mined ore. They consist of ground rock, unrecoverable and uneconomic metals, chemicals, organic matter and effluent from the process used to extract the desired products from the ore. Tailings are stored in tailings storage facilities (TSFs). TSFs are dynamic structures that are ...
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Process effluents and mine tailings: sources, effects …
Giri et al. studied synthesis and characterization of magnetite nanoparticles using waste iron ore tailings for removal of dyes from aqueous solution. They suggested for possible large-scale application of …
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Tailings Dam Failures – Factors, Causes, and Examples
Inappropriate engineering design ... More recently was the Brumadinho dam disaster, which occurred on 25 January 2019, when a tailings dam at an iron ore mine in Minas Gerais, Brazil, broke and released 12 million m 3 of tailings, more than any events reported and resulted in 270 deaths.
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(PDF) Design of dams for mining industry
Design of Dams for Mining Industry is a paper that discusses the challenges and best practices of constructing and maintaining dams for tailings and water management in the mining sector. The ...
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Vale drills caused Brumadinho dam collapse, police say
Vale previously said that the rupture had been caused by the weight of the tailing itself, associated with rains at the end of 2018. Federal Police also dismissed the hypothesis that a detonation ...
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Best Practices for Tailings Dam Design – KCB
Tailings dam design should be based on a complete understanding of the foundation geology and soils, through comprehensive site investigations, and designed for the full life cycle of the mine, from the initial stages of construction, to mining operations, and ultimately decommissioning and closure …
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Chemical, physical, and biological attributes in soils
The Fundão dam released 43 million cubic meters of iron mining tailings into the environment, and most of this tailing was deposited along the riparian zone of the Gualaxo do Norte River that is ...
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Utilisation of iron ore tailings as aggregates in concrete
Sustainable handling of iron ore tailings is of prime concern to all stakeholders who are into iron ore mining. This study seeks to add value to the tailings by utilising them as a replacement for aggregates in concrete. A concrete mix of grade 40 MPa was prepared in the laboratory with water–cement ratio of 0.5.
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Guidance about tailings storage
What are tailings storage facilities (TSFs)? Tailing storage facilities (TSFs) are reservoirs that store mine tailings, which is fine-grained waste material in suspension that is discharged from an ore processing plant or coal preparation plant. Inappropriate storage of tailings can lead to safety, health and environmental hazards.
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A tenth of the world's tailing dams have had stability …
The research, led by the Church of England (CoE) and fund managers, reveals that at least 166 of 1,635 dams holding mining waste — tailings — have had safety issues in the past. The group ...
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Managing Mine Tailings Dams Safely | Anglo American
Tailings are the materials left over following the processing of mined ore that separates the valuable metals or minerals from the host rock. Tailings are not the same as waste rock, the latter being soil or rock or other material that covers or surrounds an orebody and that is displaced during mining but is not processed.
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