Mining Project
Mostrando 1-12 de 71 artigos, teses e dissertações.
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1. Obtaining geotechnical parameters from correlations between geophysics and CPT tests in tailings dams
Abstract This article introduces a hassle-free methodology for geotechnical parameters to be obtained from correlations between geophysics and CPT field tests in tailings dams undergoing the decommissioning process, which are reasonably representative of site conditions, from the very early project stages, with extensive coverage of all impoundment parts, wi
REM, Int. Eng. J.. Publicado em: 2020-12
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2. Influence of water level in mine sequencing applied to strategic mining planning
Abstract Developing mine sequencing involves a number of factors and a large amount of information, and consequently the profitability of the project will strongly depend on the production schedule. A mining project may be conditioned to non-optimal sequencing, which may affect the economic results of the project and also lead to an inadequate utilization of
REM, Int. Eng. J.. Publicado em: 2020-06
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3. Comparison between traditional project appraisal methods and uncertainty analysis applied to mining planning
Abstract Long-term mining planning is a complex process which involves a large number of variables and uncertainties. Traditional discount cash flow (DCF) is usually used in the evaluation of mining projects. DCF includes net present value (NPV), internal rate of return (IRR), and profitability index (PI). A sensitivity analysis is usually carried out to eva
REM, Int. Eng. J.. Publicado em: 2020-06
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4. Increased power efficiency in mining by using high-fidelity haul truck simulation
Abstract The current economic and political scenario in Brazil has allowed small, medium and large companies to adopt cost cutdown and productivity increase strategies. Diesel fuel consumption by off-highway haul trucks stands for one of the largest costs at the Sossego Mine operational management department. Based on this fact, as well as on the 8% increase
REM, Int. Eng. J.. Publicado em: 2020-03
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5. Estimation of mercury released from an abandoned gold mine in Minas Gerais, Brazil
Abstract Mining is very important to the economic, political and social development of the Minas Gerais State in Brazil ever since the time the country became a Portuguese colony in the early 1500s. However, few researches have been conducted to evaluate the environmental impacts associated with the mining activity at this time. There are many abandoned mine
REM, Int. Eng. J.. Publicado em: 2020-03
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6. Analysis of the impacts of slope angle variation on slope stability and NPV via two different final pit definition techniques
Abstract The traditionally and widely used Lerchs-Grossmann algorithm presents well-known limitations that newer propositions attempt to overcome. The direct block schedule (DBS) methodology, which has gained relevance with computational advances, obtains the final pit as a natural result of production sequencing, different from Lerchs-Grossmann-based algori
REM, Int. Eng. J.. Publicado em: 2020-03
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7. ORGANIZATIONAL IRRESPONSIBILITIES OR ABSENCE OF TERRITORIAL GOVERNANCE? REFLECTIONS ON ENVIRONMENTAL MANAGEMENT IN THE MINAS-RIO PROJECT
Resumo Este trabalho teve por objetivo sistematizar e analisar dimensões sociais e organizacionais do processo de licenciamento ambiental e implantação do projeto minerário Minas-Rio, discutindo fragilidades metodológicas e gerenciais evidenciadas pelo acúmulo de denúncias de irregularidades, conflitos socioambientais e falhas de planejamento do empre
Ambient. soc.. Publicado em: 26/08/2019
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8. The emergence of Resistance through Criticality: leisure and tourism in the Espinhaço Range Biosphere Reserve, Brazil
Resumo Após vivenciar um programa de turismo sustentável relativamente bem sucedido, a cidade de Conceição do Mato Dentro, localizada dentro da Reserva de Biosfera da Serra do Espinhaço, mudou notavelmente após o lançamento de um grande projeto de mineração em 2006. Entre as mudanças, houve a substituição do turismo pela mineração como polític
Rev. Bras. Pesq. Tur.. Publicado em: 01/07/2019
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9. A decision-making method to assess the benefits of a semi-mobile in-pit crushing and conveying alternative during the early stages of a mining project
Abstract A significant cost in the operating budget of most mining operations arises from purchasing and maintaining haulage trucks. Recently, in-pit crushing and conveying (IPCC) has been subject to research because of its potential to reduce haulage costs. The objective of this study is to identify early on in a project, by means of a decision-making metho
REM, Int. Eng. J.. Publicado em: 2019-06
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10. Grade uncertainty embedded in long term scheduling: stochastic mine planning
Abstract The inclusion of grade uncertainty for multivariate mineral deposits is of great importance for the correct management of subsequent decisions involved in mining planning. Mapping grade uncertainties allows maximization of profit and resource extraction. In this article, the co-simulation turning band algorithm is applied with the aim of predicting
REM, Int. Eng. J.. Publicado em: 2019-06
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11. NPV analysis of multiple surface constraints for pit expansion scenarios under geological uncertainty
Abstract To optimize a mining project, it is necessary to deal with several technical aspects and constraints, such as orebody modelling, reserve estimation, blending strategy, optimal and operational pit designs, cost control, environmental issues, among others. In this sense, locating surface infrastructures is one of the most critical mine planning concer
REM, Int. Eng. J.. Publicado em: 2019-06
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12. An integrated pit-to-plant approach using technological models for strategic mine planning of copper and gold deposits
Abstract The strategic mine plan is a crucial step for the success of mining companies, and for its development, it is necessary to use a number of inter-related variables that are usually estimated independently. These variables include operational data that is traditionally isolated in information islands between the different departments in the mine or th
REM, Int. Eng. J.. Publicado em: 2019-06