Geological Risks
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. Chilean artisanal mining: a gambling scenario
Abstract One of the most characteristic aspects of artisanal mining is the lack of geological exploration. Going into production without previous exploration is here defined as a gambling scenario. The present study intended to quantify the risk associated to such gambling by analyzing the operations of an area of artisanal underground gold mining in central
REM, Int. Eng. J.. Publicado em: 2020-06
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2. Analysis of the Levels of Alteration of Aquifers Caused by the Installation of Wind Farms on Dunes on the Coast of Ceará, Brazil
Resumo A pesquisa objetivou avaliar os níveis de alteração dos aquíferos a partir da instalação de parques eólicos sobre dunas no litoral do Ceará por meio dos métodos de vulnerabilidade GOD e POSH, fluxo subterrâneo e aplicação da análise multivariada para subsidiar no monitoramento da qualidade da água subterrânea na área. Foram realizadas
Rev. Ambient. Água. Publicado em: 25/11/2019
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3. Classical and stochastic mine planning techniques, state of the art and trends
Abstract Determination of the best possible ultimate pit for an open pit mine is a fundamental subject that has undergone a highly evolutionary process, reviewed in this study, since the correct choice carries substantial economic impact for the industry. The correct choice can be very beneficial for project analysis, whereas an incorrect choice has the pote
REM, Int. Eng. J.. Publicado em: 2018-04
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4. Development of natural gas fields under uncertainties / Desenvolvimento de campos de gas natural sob incertezas
This work studied the use of a methodology that allow calculate the risks and the value of information (VOI) in natural gas fields at initial stage of development. It is necessary to know the specific characteristics of recovery from a natural gas field, recognize uncertainties, both geological and the market and also the risks involved in investment decisio
Publicado em: 2010
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5. Methodology of production strategy optimization based on genetic algorithms / Metodologia de otimização probabilistica de estrategias de produção baseada em algoritmos geneticos
High levels of uncertainty and associated risks in the exploration and production of some oil fields suggest the use of probabilistic optimized production strategies. Therefore, an appropriate production strategy should be chosen considering various geological and economic scenarios. In this work, a new approach for the optimization is proposed where the pro
Publicado em: 2008
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6. Metodologia de planejamento estratégico de lavra incorporando riscos e incertezas para a obtenção de resultados operacionais. / Strategical minnig planning methodology incorporating risks and uncertanties to obtain operational results.
Strategic mine planning corresponds to the process to determine the best mine design and scheduling according to a previously stablished strategy. It is considered as a key element for the success of a mining venture, once supports the decision process related to it conduct and development. Conventional strategic mine planning methods are based on determinis
Publicado em: 2008
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7. Problemas Geoambientais Provocados pela Expansão Urbana no Município de Bragança Paulista, SP
Este trabalho visa avaliar se a expansão urbana da cidade de Bragança Paulista está ocorrendo com o mínimo impacto ambiental, que assegure a manutenção da qualidade de vida da sociedade bragantina. O município está localizado na porção leste do estado de São Paulo, a cerca de 80 km ao norte da capital paulista. Para a análise dos impactos, foram
Publicado em: 2008
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8. Mercury occorrence at the Iguaçu River Basin, State of Parana, Brasil / Ocorrencia de mercurio na Bacia do Rio Iguaçu, Estado do Parana, Brasil
Mercury contents in rocks, soil and stream sediment were determined to investigate the origin of the geochemical anomaly found in sediments of the Iguaçu River, as indicated in previous studies of a regional geochemistry survey. Except for its headwaters in the Curitiba area, with Precambrian basement rocks and Pleistocenic sediments of the Curitiba Basin,
Publicado em: 2007
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9. CARACTERIZAÇÃO E AVALIAÇÃO DE IMPREVISTOS GEOLÓGICOS EM OBRAS DE PEQUENAS CENTRAIS HIDRELÉTRICAS (PCHs)
The construction of a hydroelectric undertaking requires wise combination formed by several technical and nontechnical aspects of different nature but, by all means, the local geological- geotechnical characteristics are of fundamental importance for a suitable quality control of works, guaranty of undertakings security, reductions of costs and risks related
Publicado em: 2006
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10. Análise multi-temporal de cenas do satélite quickbird usando um novo paradigma de classificação de imagens e inferências espaciais. Estudo de caso: Belo Horizonte, MG / Multi-temporal analysis of quickbird images using a new classification paradigm and spatial inferences. A case study: Belo Horizonte - MG, Brazil
Due to the strong urbanization process occurring in Brazil and of population increase in cities, and consequently to serious impacts on environment, there is a growing need to develop methodologies and technologies which allow to monitor, analyze and to make an intervention at the urban expansion. Belo Horizonte (State Capital of Minas Gerais) is a highly co
Publicado em: 2006
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11. Comparação de tecnicas de analise de risco aplicadas ao desenvolvimento de campos de petroleo / Comparison of tecniques for risk analysis applied to petroleum field development
Petroleum field decision-making process is associated to high risks due to geological, economic and technological uncertainties, and high investments, mainly in the appraisal and development phases of petroleum fields where it is necessary to model the recovery process with higher precision increasing the computational time. One way to speedup the process is
Publicado em: 2005
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12. Co-incineração e co-processamento de residuos industriais perigosos em fornos de clinquer : investigação no maior polo produtor de cimento do pais, região metropolitana de Belo Horizonte, MG, sobre os riscos ambientais, e propostas para segurança quimica
This thesis presents the results of the research realized in the years 1998 to 2002 about the principal technological, energetic, territorial and environmental aspects related with the hazardous industrial wastes processing in the c1inker kilns of cement plants. The analysis considered this activity a complex system with risks and uncertainly, because occur,
Publicado em: 2003