Rozprawy doktorskie na temat „Bauxite mine”
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Mengler, Faron. "Gully erosion on rehabilitated bauxite mines". University of Western Australia. School of Earth and Geographical Sciences, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0176.
Pełny tekst źródłaAnderson, Jonathan D. "Impacts of amending bauxite residue sands with residue fines for the establishment of vegetation on residue disposal areas /". Murdoch University Digital Theses Program, 2009. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20090831.155453.
Pełny tekst źródłaBah, Saliou Diao 1959. "Evaluation of the use of shovels and trucks at the Sangaredi bauxite mine (Republic of Guinea)". Thesis, The University of Arizona, 1991. http://hdl.handle.net/10150/558169.
Pełny tekst źródłaGherardi, Mark James. "Availability and management of manganese and water in bauxite residue revegetation". University of Western Australia. Soil Science and Plant Nutrition Discipline Group, 2004. http://theses.library.uwa.edu.au/adt-WU2005.0038.
Pełny tekst źródłaKeita, Oumar. "Modélisation et expérimentation de l'endommagement des roches sous charge explosive: application aux mines de bauxite de Guinée". Doctoral thesis, Universite Libre de Bruxelles, 2014. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209195.
Pełny tekst źródłaLa loi est implémentée dans le code aux éléments finis LAGAMINE pour étudier la réponse macroscopique du modèle. Plusieurs cas d'applications en dynamique ont été examinés.\\
- En 1D, les problèmes de localisation ont été étudiés dans une barre sollicitée en traction dynamique par une rampe de chargement. Selon l'amplitude de chargement, trois réponses ont été identifiées: a) comportement purement élastique pour des faibles charges, b) localisation à l'extrémité encastrée de la barre pour des chargements modérés et c) localisation à la tête de la barre pour des chargements élevés. L'influence de la taille microstrurelle sur la localisation a été examinée. Des simulations numériques de l'essai de traction dynamique par écaillage ont été éffectuées. Des essais expérimentaux de traction dynamique par écaillage ont été réalisés sur la bauxite et ont permis de valider le modèle en comparant l'analyse post mortem de l'éprouvette aux résultats des simulations numériques d'écaillage. Ces essais ont aussi permis de déterminer les caractéristiques mécaniques du matériau, la résistance mécanique en traction dynamique, l'instant de rupture et la vitesse de déformation à rupture.\\
- En 2D, des simulations numériques sont efféctuées pour reproduire le comportement d'une mine sous charge explosive. Le modèle a été capable de reproduire l'endommagement en traction sous charge explosive. L'influence des paramètres du modèle tels que: l'orientation de fissures, la taille de microstructure et la valeur initial d'endommagement sur la distribution de l'endommagement autour du trou de charge a été étudiée. Enfin, un cas d'application sur les mines de bauxite de Guinée a été étudié, incluant un calcul de l'extension de la zone endommagée ainsi qu'une prédiction numérique du niveau de vibration engendrée suite aux tirs à l'explosif. La prédiction du modèle est globalement en accord avec les résultats de la littérature.
Doctorat en Sciences de l'ingénieur
info:eu-repo/semantics/nonPublished
Lalor, Briony Maree. "An assessment of the recovery of the microbial community in jarrah forest soils after bauxite mining and prescription burning". University of Western Australia. School of Earth and Geographical Sciences, 2009. http://theses.library.uwa.edu.au/adt-WU2010.0037.
Pełny tekst źródłaKopittke, Peter Martin. "Limitations to plant root growth in highly saline and alkaline bauxite residue /". [St. Lucia, Qld.], 2004. http://adt.library.uq.edu.au/public/adt-QU20040913.094109/index.html.
Pełny tekst źródłaPrananto, Agnes Kristina. "The use of remotely sensed data to analyse spatial and temporal trends in vegetation patchiness within rehabilitated bauxite mines in the Darling Range, W.A. /". Connect to this title, 2005. http://theses.library.uwa.edu.au/adt-WU2006.0012.
Pełny tekst źródłaGüneysu, Betil. "Les problèmes juridiques internationaux posés par l'exploitation des ressources naturelles : l'exemple de la bauxite". Université Robert Schuman (Strasbourg) (1971-2008), 1994. http://www.theses.fr/1994STR30006.
Pełny tekst źródłaBauxite and alumina are vital resources for underdeveloped economies. Bauxite is exploited by multinational entreprises. The position of the aluminium industry in the military complex, its contrat of the processus of exploitation of the mineral permitted multinational entreprises to dominate their relations with the governments. Inalienability of the souvereignty on natural resources confers to state contracts a public character. In no system of law are private interests permitted to prevail over duly established public interest making impossible actions required for public good
Knierzinger, Johannes. "Le contrôle des multinationales sur les villes de bauxite en Guinée : comment descendre d'un lion". Thesis, Paris 1, 2015. http://www.theses.fr/2015PA010657.
Pełny tekst źródłaThis is a thesis on the social and political consequences of bauxite mining in Guinea . A few years before independance in October 1958, Guinea became part of a worldwide production network of mines, refineries, smelters and metal-working factories which where all controlled by a few interconnected companies. The thesis focuses on the political and social consequences of this inclusion into global commodity chain which results in cars, cans, airplanes, building and other things made out of aluminium. Beside the de facto foreign control over several bauxite towns, the three Guinean bauxite mines also provided also most governmental income since independance and had thereby a strong impact on the history of this country. In order to show these interconnections the thesis treats (1) the intrests of producer countries, receiver countries and international institutions (2) risk management and profit maximizing strategies (chain governance) of transnational companies and (3)the renogatiation and the effects of this global production network on the local level
Omaña, Sanz Brenda. "Caractérisation physico-chimique du résidu de bauxite vénézuélienne : évaluation des options de valorisation dans le domaine environnemental". Thesis, Lille 1, 2013. http://www.theses.fr/2013LIL10167/document.
Pełny tekst źródłaThe bauxite residue commonly called ‘red mud’ is an industrial waste generated during the production of alumina. The storage of this waste is considered as a major environmental problem, especially because of its caustic nature (pH> 10) and the huge produced quantities (about 1.5 t per tonne of alumina produced). The production of Venezuelan alumina (CVG Bauxilum) has generated more than 15 million m3 of bauxite residue. Moreover, no research has yet been conducted on the properties of these residues and their utilization in the environmental field. The main goals of this study focus on the physical and chemical characterization of Venezuelan bauxite residue (solid fraction) and in an evaluation of its applications as an agent for remediation of polluted systems. An integrated approach coupling chemical composition and adsorption properties, mineralogical phases, particle size, surface area and radionuclide content with studies of chemical speciation and bioavailability, yielded significant constraints including: 1) a high content of U and Th, and their respective isotopes Th232 and U238, as well as lanthanides 2) the potential risk of residue chemotoxicity towards a very labile fraction of elements such as aluminum and uranium 3) high sorption properties with respect to toxic elements, Pb, Zn and As, due to the large surface area of the residue, especially under acidic conditions (case of acid mine drainage). These results have shown the potential use of Venezuelan bauxite residue in key areas such as remediation of polluted systems (as amendment or sorbent agent) and in the recovery of metals of economic interest
Prananto, Agnes Kristina. "The use of remotely sensed data to analyse spatial and temporal trends in vegetation patchiness within rehabilitated bauxite mines in the Darling Range, W.A". University of Western Australia. School of Earth and Geographical Sciences, 2006. http://theses.library.uwa.edu.au/adt-WU2006.0012.
Pełny tekst źródłaAMORIM, Joana Cláudia Aleixo de. "Dinâmicas e interrelações a partir da implementação do projeto mina de bauxita em Paragominas – PA: Colônia Oriente e Potiritá". Universidade Federal do Pará, 2010. http://repositorio.ufpa.br/jspui/handle/2011/2705.
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CNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
SEDECT/PA - Secretaria de Estado de Desenvolvimento, Ciência e Tecnologia
O objetivo desta dissertação consiste no estudo das dinâmicas e inter-relações entre colônias do Oriente e Potiritá no contexto do Projeto Bauxita de Paragominas. Partindo deste prisma o estudo se concentra nas comunidades no entorno do Platô Miltonia Três, onde se concentra a exploração de Bauxita levando em consideração a área do mineroduto que abrange o município de Paragominas. Neste estudo é abordado a inter-relação da empresa privada, no âmbito da exploração mineral, representada pela VALE - através do Projeto bauxita de Paragominas, com o poder local consubstanciado pela gestão municipal (prefeitura), e destes com as comunidades. Para efeito de analise utilizou-se a pesquisa qualitativa e o método etnográfico valendo-se de técnicas como o roteiro de entrevista dentre outras, visando apreender os meandros da participação e o significado das inter-relações. Consideraram-se as categorias conflito, poder e participação das comunidades rurais no sentido de apreender o seu significado no contexto estudado. Essas análises permitiram compreender como ocorre a capacidade de intervenção das mesmas, face aos problemas sociais que os atingem, suas reivindicações, e seus anseios. Conclui-se que a participação como cidadãos e o acesso a informação geram responsabilidades e os torna responsáveis e capazes de transformar a realidade. Em especial uma transformação coerente com projetos sociais que os favoreçam.
This dissertation studies the dynamics and interrelations between the colonies of “Oriente” and “Potiritá” within the frame of the Bauxite Project of Paragominas. The study focuses on the communities around Platô Miltonia 3, where the bauxite exploitation is centered, taking into consideration the area of the mineral pipe system running through the municipality of Paragominas. The study examines the interrelation of private mineral companies, in this case represented by VALE, through the Bauxite Project of Paragominas, with local power represented by the city management council (“prefeitura”) and the communities. The methods used in this analysis are qualitative research and ethnographic method; techniques such as interview scripts and others were also used in order to identify participation characteristics and the meaning of interrelations. Conflict, power and rural community participation were the categories considered in this analysis, in order to learn their meaning within the studied framework. The analysis allowed us to understand how the intervention capacity occurs when facing social problems, claims and wishes. The conclusion leads us to say that participation as citizens and access to information create responsibilities, making individuals responsible for their acts and capable of changing their reality. Particularly, transformations in accordance with social projects which favor their goals.
Szota, Christopher. "Root morphology, photosynthesis, water relations and development of jarrah (Eucalyptus marginata) in response to soil constraints at restores bauxite mines in south-western Australia". University of Western Australia. School of Plant Biology, 2009. http://theses.library.uwa.edu.au/adt-WU2010.0058.
Pełny tekst źródłaDias, Fabiana Ferrari. "Percepção da população em relação as empresas de lavra e beneficiamento de Bauxita no municipio de Poços de Caldas, MG". [s.n.], 2007. http://repositorio.unicamp.br/jspui/handle/REPOSIP/287123.
Pełny tekst źródłaTese (doutorado) - Universidade Estadual de Campinas, Instituto de Geociencias
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Resumo: Intensas atividades de mineração na região de Poços de Caldas se tornaram o objeto de sérias discussões. O alumínio é extraído da bauxita encontrada em áreas próximas à malha urbana. A população está ciente de tais atividades de mineração, entretanto, não há um claro entendimento sobre impactos sociais e ambientais. Questionários cuidadosamente preparados foram submetidos aos representantes da população, aos membros voluntários das ONGs locais e aos governantes pertinentes. Bancos de dados federais foram utilizados para reunir informações sobre áreas locais de concessões de mineração. Resultados georeferenciados indicaram que a população possui uma percepção positiva sobre as atividades de mineração e está ciente da sua importância. Entretanto, o estudo foi capaz de identificar algumas deficiências nas estratégias de comunicação empregadas pelas empresas de mineração. Esta Tese é uma fonte de dados para a percepção da população em relação às atividades de mineração e foi empregada para criar um banco de dados GIS. Em adição, apontou estratégias modernas que podem ajudar a melhorar o relacionamento entre as empresas de mineração e a população local e direcionar outros projetos similares envolvendo variadas atividades de mineração próximas às áreas urbanas
Abstract: Intense mining activities in the region of Poços de Caldas have become the object of serious discussion. Aluminum is extracted from bauxite ore found in areas near urban developments. The population is aware of such mining activities, however, there is no clear understanding regarding social and environmental impacts. Carefully prepared questionnaires were submitted to representatives from the general population, to volunteer members of local NGOs, and government authorities. Available government databases were employed to gather information about local mining concession areas. Georeferenced results indicated that the population perception towards mining activities is positive and the population is aware of its importance. However, the study was able to identify some deficiencies in communication strategies employed by the mining companies. This thesis is a source of data for population perception regarding mining activities and was employed to create a GIS database. In addition, it pointed out modern strategies that can help to improve the relation between mining companies and the local population and guide other similar projects involving diverse mining activities near urban areas
Doutorado
Administração e Politica de Recursos Minerais
Doutor em Ciências