Drill Holes
Mostrando 1-12 de 18 artigos, teses e dissertações.
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1. Geostatistical simulations with heterotopic hard and soft data without modeling the linear model of coregionalization
Abstract Most mining decisions are based on models estimated/simulated given the information obtained from samples. During the exploration stage, samples are commonly taken using diamond drill holes which are accurate and precise. These samples are considered hard data. In the production stage, new samples are added. These last are cheaper and more abundant
REM, Int. Eng. J.. Publicado em: 2021-06
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2. Indicator kriging applied to RMR geomechanical modelling in a Pb-Zn deposit case study
Abstract The opening of a mining enterprise requires knowledge of the geomechanical characteristics of the mineral deposit, which will be worked according to the use of parameters of stability and/or resistance of the material, as well as the discontinuities present in the rock. In this study, the Rock Mass Rating methodology was used to propose a geomechani
REM, Int. Eng. J.. Publicado em: 2021-06
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3. Selection of optimal process parameters for minimizing burr size in drilling using Taguchi's quality loss function approach
The exit burr in drilling degrades the precision of products and causes additional cost of deburring. Therefore, it is essential to minimize burr size at the exit of holes in drilling at the manufacturing stage. Taguchi's quality loss function approach, a multi-response optimization method, has been employed to determine the best combination values of cuttin
J. Braz. Soc. Mech. Sci. & Eng.. Publicado em: 2012-09
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4. Análise estratigráfica da barreira transgressiva holocênica na região da Lagoa do Sombrio, SC
Na Planície Costeira Sul de Santa Catarina, entre o rio Mampituba e o norte da lagoa do Sombrio encontram-se depósitos costeiros gerados por transgressões e regressões da linha de costa durante o Quaternário. A área de estudo situa-se em um suave embaiamento costeiro onde a barreira holocênica apresenta um comportamento progradacional. Contudo, dados
Publicado em: 2011
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5. Análise estratigráfica da barreira transgressiva holocênica na região da Lagoa do Sombrio, SC
Na Planície Costeira Sul de Santa Catarina, entre o rio Mampituba e o norte da lagoa do Sombrio encontram-se depósitos costeiros gerados por transgressões e regressões da linha de costa durante o Quaternário. A área de estudo situa-se em um suave embaiamento costeiro onde a barreira holocênica apresenta um comportamento progradacional. Contudo, dados
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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6. Improvement of the productivity in getting holes in aviation aluminum alloys with high speed tools / Melhoria da produtividade na obtenção de furos em liga de aluminio aeronautico com ferramentas de aço rapido
The purpose of this study is to optimize the manufacturing process of holes made by Company X in one of their products. Besides the optimization, should be maintained the dimensional quality by controlling the diameter, roundness, circularity, and surface finish of cylindrical holes obtained by the widening process, with high-speed steel reamers in a aluminu
Publicado em: 2010
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7. Burr produced on the drilling process as a function of tool wear and lubricant-coolant conditions
This work shows the resulting height and shape of the burrs produced by drilling holes with ratio L/D = 3. The tool used in the tests was the solid twist HSS drill coated with TiAlN, with diameter of 10 mm, to drill the microalloyed steel DIN 38MnS6. The height of the burr was studied under different lubricant/coolant systems, namely: dry machining, use of M
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2009-03
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8. Effect of monomer content in the monomer-polymer proportion on complete denture teeth displacement / Efeito do conteudo de monomero na proporção monomero-polimero no deslocamento dental em protese total superior
The purpose of the study was to verify the linear displacement of the teeth in complete upper denture made with acrylic resin, with monomer content indicated by the manufacturer, with 25% in excess and 25% less, in the conventional and microwaves polymerization techniques. Thirty casts were made with type III stone plaster, based on silicone mould, represent
Publicado em: 2009
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9. Evaluation of the gradient precision of the horizontal directional drilling technique for the installation of gravity sewers / Avaliação da precisão da declividade da técnica de perfuração direcional horizontal para instalações de redes de esgoto
The present work is focused on the horizontal directional drilling (HDD) method to install gravity sewers. The results of different techniques are described intending to meet the demands of gradient. Therefore, 4 experimental pilot bores were drilled simulating a section of those structures extending 30 m with HDPE pipelines of 125 mm external diameter. Thos
Publicado em: 2008
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10. Co-estimation geostatistical methods: a study of the correlation between variables at results precision / Métodos geoestatísticos de co-estimativas: estudo do efeito da correlação entre variáveis na precisão dos resultados
This master dissertation presents the results of a survey into co-estimation methods commonly used in geostatistics. These methods are ordinary cokriging, collocated cokriging and kriging with an external drift. Besides that ordinary kriging was considered just to illustrate how it does work when the primary variable is poorly sampled. As we know co-estimati
Publicado em: 2008
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11. Estudo sobre a furação de compósito de resina epóxi reforçado com fibras de vidro
The technological development has allowed the manufacture of sophisticated goods, leading to the pursuit of materials able to satisfactorily fulfill these requirements. Materials such as traditional metals, polymers and ceramics are still widely employed; however, they have been increasingly replaced by composite materials, which must be processed to the fin
Publicado em: 2007
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12. Interpretação de dados de eletromagnetometria aerotransportada (AEM) do sistema GEOTEM (domínio do tempo)
Desde 1950 estudos vem sendo realizados na aplicação da condutividade elétrica ao mapeamento geológico, com ênfase nos sistemas aeroeletromagnéticos. Estes sistemas usam o campo eletromagnético secundário obtido por contrastes em propriedades elétricas em subsuperfície em resposta a perturbações criadas por fontes eletromagnéticas naturais ou ar
Publicado em: 2007