Mine Waste Beach Profile and Flow Resistance Equations

Morris, P. H.

doi:10.1080/1389526042000263315

Cited by 7 publications

(7 citation statements)

References 14 publications

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“…Também se assume que as entradas de água e sedimentos são efetivamente constantes; que o fluxo é canalizado e se espalha lateralmente à medida que passa pela praia; e que todo o sedimento de entrada é retido na praia. Morris (2004) desenvolveu uma formulação a partir da combinação de Morris (1993) e Parker et al (1998), cuja largura do canal varia linearmente ao longo de L. Isso leva à conclusão de que a descarga de sedimentos de carga de leito varia parabolicamente em L e atinge zero em x = L, conforme equação (5): S = S o exp (--Kx²) (5) Onde: S: Inclinação de fundo; S o : Inclinação do ponto x=0; K: coeficiente de concavidade da praia;…”

Section: Formação Da Praia De Rejeitosunclassified

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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: Formação Da Praia De Rejeitosunclassified

“…Os estudos de Morris (2004) e Fitton, Bhattacharya e Chryss (2008) elencam e descrevem mais métodos.…”

Section: Figura 11: Dimensionamento Dos Perfis De Rejeitos a Partir Dunclassified

Barragens De Contenção De Rejeitos De Mineração No Brasil

Junior

Heineck

2018

HOLOS

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“…The Melent'ev Master Profile suggests that for a given tailings and solid concentration, a beach profile will conform to a master profile regardless of the vertical and horizontal distances between the point of discharge and the edge of the tailings pond. Morris and Williams (1996) and Parker et al (1998) developed a model to describe mine tailings beaches within the framework of fluvial fan hydraulics, which was further refined by Morris (2004).…”

Section: Existing Beach Prediction Modelsmentioning

confidence: 99%

Prediction of tailings beach slopes and tailings flow profiles

Li¹

2011

Proceedings of the 14th International Seminar on Paste and Thickened Tailings

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Thickened and paste tailings disposal can provide a viable means to conserve water and reduce the risks associated with large volumes of water stored on the surface of tailings storage facilities. Thickened tailings deposition is a fast growing technology in the mining industry for both environmental and long term economical considerations. For surface deposition, the required beach slope and the tailings rheological properties often dictate the thickening process. The tailings beach slope is a key parameter in deposition requirements, which governs the storage capacity and the footprint of tailings management facilities. Prediction of the beach slope is fundamental for the design of non-segregating tailings stacks. But the existing tailings beach predictive models are not sufficiently developed as industrial standard applications. This paper presents a tailings deposition model and development of an analytical tool for prediction of tailings beach slopes. Dynamic profiles of tailings flows are also discussed. The mechanisms of tailings deposition and evolution of tailings beach slopes are investigated from both geotechnical and hydraulic engineering perspectives. The model is developed based on solid mechanics and fluid mechanics principles satisfying limit equilibrium conditions and energy conservation. The governing differential equations can be solved using a numerical technique and the solution scheme can readily be implemented in Fortran or other computer language. A design tool is developed using a Fortran code (BSLOPE), which takes into account rheological properties of tailings, operation parameters and site topographic conditions. The required properties of the tailings for beach slope predictions can be determined through laboratory testing and refined during operation. Case studies demonstrate that the modelling results are in agreement with field measurements. A sensitivity study was carried out to investigate the effects of the yield stress and discharge rate on the beach slope.

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“…Typically, tailings beaches are concave in profile (Blight, 1994; Morris, 2004), with slopes that vary between 0 and 3 percent (Williams and Seddon, 1999; Williams, 2001). Methods have been presented for the prediction of the slope of a tailings beach by Melent'ev, Kolpashnikov and Volnin (1973), Williams and Meynink (1986), Kupper (1991), Pinto and Barrera (2002), Pirouz (2006), Chryss, Fitton and Bhattacharya (2006) and Fitton, Chryss, and Bhattacharya (2006).…”

Section: Introductionmentioning

confidence: 99%

“…Methods have been presented for the prediction of the slope of a tailings beach by Melent'ev, Kolpashnikov and Volnin (1973), Williams and Meynink (1986), Kupper (1991), Pinto and Barrera (2002), Pirouz (2006), Chryss, Fitton and Bhattacharya (2006) and Fitton, Chryss, and Bhattacharya (2006). Other workers have presented methods for predicting the degree of concavity in a tailings beach (Blight, 1994; Morris, 2004).…”

Section: Introductionmentioning

confidence: 99%

Three‐Dimensional Modeling of Tailings Beach Shape

Fitton

Bhattacharya

Chryss

2007

Computer aided Civil Eng

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Tailings (mining waste) disposal is a significant consideration for the mining industry, with the majority of the ore processed in most mining operations ending up as tailings. This creates large volumes of tailings, which must be handled and stored responsibly to avoid potential environmental catastrophes. The most common form of tailings storage facility is the impoundment, where tailings are contained within a basin, with beaches forming around the perimeter of the impoundment and a pond standing in the middle. A relatively new method of tailings storage is to create a "stack," whereby the tailings solids form a large heap, with the discharge of tailings slurry from the apex of the heap. This method of tailings storage is finding greater popularity as the industry seeks to reduce the amount of water discharged with the tailings, and usually features the discharge of non-segregating tailings slurry that flows turbulently in its own self-formed channel down the tailings beach. It is of significant interest for mine operators and tailings engineers to be able to predict the shape of the beach that forms in either of these disposal scenarios. The key to being able to do this relies on a method of prediction of the beach slope. In this article two new beach shape models are presented for the three-dimensional (3-D) geometric modeling of the beach surface of a tailings stack that has been formed through the variable discharge of a non-segregating slurry that periodically changes in its composition, whereby the overall discharge output is defined as a sequence of smaller finite periods of steady uniform discharge, each having its own resulting beach slope. A beach slope model previously presented by the authors has been used here to predict the applicable beach slope for each finite discharge regime. The shape models presented here present two different methods for the compounding of the individual tailings deposits that are generated by each of these finite discharge * To whom correspondence should be addressed. E-mail: Satinath. Bhattacharya@rmit.edu.au. regimes. Historic tailings discharge data is run through both models, and the shapes predicted by the models are compared with aerial survey data of real tailings stacks. This work not only presents a method of tailings stack shape prediction, but also a plausible theory for explaining the concavity of tailings beaches. The models also have the potential to be developed further for the 3-D modeling of tailings beaches formed in other types of storage facilities, such as impoundments or valleys.

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Mine Waste Beach Profile and Flow Resistance Equations

Cited by 7 publications

References 14 publications

Barragens De Contenção De Rejeitos De Mineração No Brasil

Barragens De Contenção De Rejeitos De Mineração No Brasil

Prediction of tailings beach slopes and tailings flow profiles

Three‐Dimensional Modeling of Tailings Beach Shape

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