Navegação Produção Científica por Assunto "Krigagem"
Resultados 1-9 de 9
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Cokrigagem de razões logarítmicas aditivas (alr) na estimativa de teores em depósitos de ferro
(2012) [Artigo de periódico]Os produtos do minério de ferro são definidos pelos teores de ferro e dos conta- minantes e, também, pelas partições granulométricas. Os dados que provêm dos depó- sitos de ferro constituem dados composicionais, sendo um ... -
Field parametric geostatistics : an alternative to tackle gold grade estimations
(2019) [Artigo de periódico]High anomalous grades are very common in gold deposits, whose presence requires careful treatment to prevent overestimation of metal content. Mineral resource analysts have worked on the estimation of several gold deposits, ... -
Geometallurgical modelling to help in predicting zinc metallurgical recovery
(2016) [Trabalho completo publicado em evento] -
How the use of stratigraphic coordinates improves grade estimation
(2015) [Artigo de periódico]Some mineral deposits show mineralization along layers. These layers may pass through several subsequent geological events such as folding and/or severe erosional processes. Grades within these deposits tend to be correlated ... -
Improving short-term grade block models: alternative for correcting soft data
(2018) [Artigo de periódico]Short-term mining planning typically relies on samples obtained from channels or less-accurate sampling methods. The results may include larger sampling errors than those derived from diamond drill hole core samples. The ... -
Integration of different-quality data in short-term mining planning
(2015) [Artigo de periódico]Decisions, from mineral exploration to mining operations, are based on grade block models obtained from samples. This study evaluates the impact of using imprecise data in short-term planning. The exhaustive Walker Lake ... -
Minimum/maximum autocorrelation factors applied to grade estimation
(2014) [Artigo de periódico]It is frequent to face estimation problems when dealing with mineral deposits involving multiple correlated variables. The resulting model is expected to reproduce data correlation. However, is not guaranteed that the ... -
Quantificação de riscos na avaliação estéril/minério
(2002) [Artigo de periódico]A razão estéril/minério é um importante fator na exeqüibilidade de minas a céu aberto. Precisos modelos digitais de elevação topográfica e outras superfícies de interpolação bem delineadas são imprescindíveis nesse tipo ... -
The effect of accumulation in 2D estimates in phosphatic ore
(2014) [Artigo de periódico]The geological modeling of stratiform deposits can become very complex, often making use of geological envelopes of small thickness and requiring the use of subblocks (based on Cartesian coordinates) to produce a coherent ...
