Geotechnical Properties of Mine Tailings

Hu, Liming; Wu, Hui; Lin, Zhang; Zhang, Pengwei; Wen, Quan

doi:10.1061/(asce)mt.1943-5533.0001736

Cited by 94 publications

(45 citation statements)

References 14 publications

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“…Qiu e Sego (2001) realizaram ensaios de granulometria em quatro rejeitos e em termos de densidade real, obtiveram: 2,75 (Cobre), 3,17 (Ouro), 1,94 (Carvão Puro) e 2,60 (Compósito de areias de óleo em rejeitos consolidados). Hu et al (2017) realizaram caracterização física de quatros rejeitos, sendo eles: rejeitos finos e granulares de minério de ferro de Yuhezhai; e rejeitos finos e granulares de minério de cobre de Bahuerachi. Quanto a densidade real, os rejeitos finos e granulares de minério de ferro Yuhezhai apresentaram valores de 3,08 e 3,23, respectivamente.…”

Section: Propriedades Físicas Do Rejeito Mineralunclassified

“…Qiu e Sego (2001) realizaram a investigação em laboratório a partir de ensaios de CU de quatro rejeitos (Chumbo, Ouro, Carvão puro e rejeitos consolidados) foram obtidos valores entre 0 kPa e 10kPa e ângulos de atrito entre 30° e 34°. Hu et al (2017) informou valores de ângulo de atrito e coesão através da Tabela 3 obtidos através de ensaios triaxiais CU e CD conduzidos nos rejeitos de ferro Yuhezhai (A) e apenas ensaios triaxiais CU conduzidos em rejeitos de cobre da Bahuerachi (B), cujos tipos são granulares (G) e finos (F). Tipos Tipo…”

Section: Parâmetros De Resistência Dos Rejeitos Mineraisunclassified

“…Qiu e Sego (2001) realizaram ensaios de consolidação em quatro rejeitos, cujos valores de Cc foram: Cobre (0,056 a 0,094) Ouro (0,370 a 0,396), Carvão Puro e Compósito de areias de óleo em rejeitos consolidados (0,271 a 0,319). Hu et al (2017) mencionaram em seus estudos os índices de vazios (e) e valores de C c dos quatros rejeitos, sendo eles: rejeitos finos (e=1,41 e Cc = 0,260) e granulares (e=0,74 e Cc = 0,046) de minério de ferro de Yuhezhai; e rejeitos finos(e=1,03 e Cc = 0,085) e granulares (e=0,84 e Cc = 0,025) de minério de cobre de Bahuerachi.…”

Section: Parâmetros De Resistência Dos Rejeitos Mineraisunclassified

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Barragens De Contenção De Rejeitos De Mineração No Brasil

Junior

Heineck

2018

HOLOS

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O setor minerário brasileiro representa uma parcela importante na geração de recursos através da comercialização no mercado nacional e internacional. Este setor movimenta outros setores através suprimento da matéria-prima extraída, como é exemplo das indústrias da construção civil, automobilística, aeroespacial e outras. Muito embora sua importância seja relevante e estratégica na economia, a geração de resíduos é significativa e para tanto é necessário que sejam viabilizados métodos de disposição destes materiais obedecendo as restrições ambientais, sociais e econômicas. Com isso, diante ao enorme vulto de materiais residuais gerados, as barragens de contenção rejeitos minerais representam uma das técnicas mais optadas por mineradoras e geotécnicos. Logo, este artigo tem como proposta fornecer informações quanto a conceitos, métodos construtivos, técnicas e outros aspectos que envolvam o assunto barragem de contenção de rejeitos a partir de uma revisão literária.

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Section: Propriedades Físicas Do Rejeito Mineralunclassified

Section: Parâmetros De Resistência Dos Rejeitos Mineraisunclassified

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Barragens De Contenção De Rejeitos De Mineração No Brasil

Junior

Heineck

2018

HOLOS

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“…Disposal of MTs is a major concern for many countries as it contaminates the environment including the atmosphere, water resources and soil [4,5]. The MTs always contain PTEs concentrated during ore processing, which may disperse into the nearby environment and threaten public health [6]. Elements such as Al, Cd, Cu, Fe, Mn, Pb and Zn, Mn are essential for cell growth and metabolism; however, at high levels, they are toxic for living organisms [5]; hence, referred to as PTEs.…”

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confidence: 99%

Static Test-Based Acid Rock Drainage Formation Potential of Metalliferous Tailings from O’Kiep, South Africa

2019

SETWM-19, ACBES-19, EEHSS-19 Nov. 18-19, 2019 Johannesburg (South Africa)

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One of the environmental challenges in O'Kiep is the increased levels of potentially toxic elements (PTEs) in metalliferous tailings (MTs), which may result in acid rock drainage (ARD) through oxidation. In this study, laboratory-based static tests were conducted on MTs to predict the risk of acid rock drainage potential (ARDP). Mineralogical analysis of the MTs showed that the MTs consisted mainly of quartz, microline, muscovite, albite, anorthite, magnetite, magnesioferrite, gypsum and halloysite-10A. The major oxides, i.

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“…Since these materials were not tested, the material properties were obtained from the literature for waste material produced by the similar mine. Values obtained from the literature(Bhanbhro 2014;Holmqvist and Gunnteg 2014;Hu et al 2016) were used as the upper and lower limits for computational analysis. It was…”

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confidence: 99%

A Unified Risk-Based Framework for Assessing Sustainability and Resiliency of Civil Infrastructure

Robbins¹

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Graduate College. iv ACKNOWLEDGMENTS I would like to acknowledge Dr. Chittoori for his efforts in making this thesis possible. Without his guidance or understanding, I would not have been afforded the opportunity to research this topic, which is a construct of my own accord. v ABSTRACT As of February 2019, the National Aeronautics and Space Administration (NASA) has reported since 1880 the average global temperature has increased 1°C, withthe warmest year on record being 2016. As the years continue to pass, it is becoming more evident that climate change is occurring, which is known to be a catalyst for climatic weather events. Statistically speaking, these events are more prevalent, and catastrophic exemplified as hurricanes, earthquakes, flooding, and fires. In addition to the increase of potentially catastrophic events, society as a whole has become more conscientious in the use and preservation of natural resources, waste generation, and energy consumption. As the overall population continues to grow, the need for safe, secure and sustainable infrastructure increases. Civil infrastructure must be assessed to measure the level at which it will withstand impact from a catastrophic event, as well as how it is utilizing precious resources and energy.In consideration of these previously mentioned issues, several federal agencies, companies, and researchers have put forth an effort to measure and quantify the ability of civil infrastructure to withstand climatic catastrophes. Also, metrics to quantify sustainable construction are increasingly used as a common tool for infrastructure design and development. Most sustainability metrics consider the qualities of a system that revolve around the concept of sustainable development but fail to consider the resiliency of that system. Sustainability assessments are often discrete and will focus on one particular aspect or measure. Resiliency metrics are often overly complex and do not vi fully encapsulate the quality in a way that is pragmatic or useful to practitioners and engineers, or simply neglect sustainable construction methods.Proposed here is a framework that attempts to unify sustainability and resiliency assessment of geotechnical infrastructure, by considering the risk of failure given the probability of a catastrophic event. The framework is developed for use on geotechnical engineered systems, specifically an earthen dam used for flood control. A Bayesian analysis is used to determine the probability of failure given the occurrence of a catastrophic event, in conjunction with both a resiliency assessment, and sustainability assessments. This is to ensure that the sustainability index is jointly dependent upon the changes in resiliency given the occurrence of a catastrophic event. Two separate failure modes that are possible at the location of the earthen dam were modeled to determine the flexibility of the framework. Failure modes include seismic events, and rapid-drawdown and both were modeled with their associated probabilities. Results from the assessment ...

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Geotechnical Properties of Mine Tailings

Cited by 94 publications

References 14 publications

Barragens De Contenção De Rejeitos De Mineração No Brasil

Barragens De Contenção De Rejeitos De Mineração No Brasil

Static Test-Based Acid Rock Drainage Formation Potential of Metalliferous Tailings from O’Kiep, South Africa

A Unified Risk-Based Framework for Assessing Sustainability and Resiliency of Civil Infrastructure

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