[PDF] Top 20 Rev. Esc. Minas vol.67 número4
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Rev. Esc. Minas vol.67 número4
... Finally, more emphasis will be given about some economic aspects: the supply chain structure, the mineral reserves, the production proile, the demand, supply and price analyses, both i[r] ... See full document
6
Rev. Esc. Minas vol.67 número4
... Embora as estradas de mina sejam apenas apoio para as atividades de minera- ção, seu papel pode ser bastante signiicativo em qualquer esforço de otimização do transporte na lavra a céu aberto realizado com caminhões. Em ... See full document
9
Rev. Esc. Minas vol.67 número4
... This paper assesses the effectiveness of the NRM-20 as a guideline and a enforce- ment tool to mine closure in Brazil; assesses the analysis criteria and approval proce- dures adopted by DNPM to base their decisions on ... See full document
6
Rev. Esc. Minas vol.67 número4 pt a01v67n4
... de Minas da Universidade Federal de Minas Gerais, publicando os melhores trabalhos do 8º CB MINA (8º Congresso Brasileiro de Mina a Céu Aberto (8th Brazilian Congress of Open Mining) - 8º Congresso ... See full document
1
Rev. Esc. Minas vol.67 número4
... This paper describes a logistic study about an underground gold mine, belong- ing to AngloGold Ashanti, where four different layout options could be applied to the tunnels, and also dif[r] ... See full document
8
Rev. Esc. Minas vol.67 número4
... Therefore, this work proposes an al- gorithm for discontinuity cluster analysis based on the Fuzzy K-means method that allows to identify the correct structure and number of families,[r] ... See full document
7
Rev. Esc. Minas vol.67 número4
... These data from distinct bases can be used for accurate geological modeling, but to estimate grades (from a statistical point of view) using them may create bias in the results.. The[r] ... See full document
7
Rev. Esc. Minas vol.67 número4
... Qualquer método empírico tem sua aplicabilidade restrita a situações onde há semelhanças com os dados utilizados para sua elaboração. O Método do Gráico de Estabilidade, proposto primeiramente por Mathews et al. (1981) e ... See full document
7
Rev. Esc. Minas vol.67 número4
... The Bayle-Norton Law, or Time Hardening Law, uses a time dependent term to represent the decreasing strain rate in primary creep, as shown in the following equation:.. ε.[r] ... See full document
7
Rev. Esc. Minas vol.67 número4
... Ford Fulkerson algorithm prioritizes the cash low results to analyze the whole set of blocks. The search engine in depth based on the idea of building stacks to ind the pits candidat[r] ... See full document
7
Rev. Esc. Minas vol.67 número4
... For this purpose, blocks of mate- rial, ore or waste rock, are allocated to the available loading equipment, and the extraction rate of each resource is deined aiming at maximizing th[r] ... See full document
9
Rev. Esc. Minas vol.67 número4
... The technique is described as fol- lows: a hydraulic fracturing is formed by pumping a fracturing luid into the well at a pressure high enough to increase the pressure in the well, ex[r] ... See full document
6
Rev. Esc. Minas vol.67 número4
... Thus, volume is the smaller size than an equivalent opening of a square screen (superior screen=SS) x larger size than an equivalent opening of a square screen (inferior screen=IS) x[r] ... See full document
8
Rev. Esc. Minas vol.67 número2
... The AVS/SEM results suggest that, although the bulk metal concentrations are above TEL (Threshold Effects Level: A chemical concentration above which some adverse effect to biota is ex[r] ... See full document
7
Rev. Esc. Minas vol.67 número2
... Since 2001, a paleochannel located on the banks of the Borrachudo River, in the locality called Canastrão (munici- pality of Tiros, Minas Gerais State), has been exploited by Petrus Mineração, a company from Patos ... See full document
7
Rev. Esc. Minas vol.67 número2
... Foram feitos testes com o vidro óptico B270® através do torneamento com fer- ramenta de diamante. Foram aplicadas condições submicrométricas de corte, a im de se gerar uma resposta dúctil, para o vidro, durante a ... See full document
6
Rev. Esc. Minas vol.67 número2
... Keywords: Horizontal directional solidiication, unsteady-state heat low, primary dendrite arm spacing, microhardness, Al-Sn Alloys.. Resumo.[r] ... See full document
7
Rev. Esc. Minas vol.67 número2
... Once the XRD results showed that the zeta, delta and gamma phases were successfully synthesized, the mixture of the three intermetallic phases (50% of delta, 30% of zeta and 20% of g[r] ... See full document
4
Rev. Esc. Minas vol.67 número2
... of Minas Gerais (Araxá and Tapira) and the ones in Goiás (Catalão), as well as the uranium phosphate of the Santa Quitéria reserve in the state of Ceará present this typol- ogy (Oliveira, ... See full document
6
Rev. Esc. Minas vol.67 número2
... This study describes the application of an empirical method to estimate the en- ergy consumption in laboratory of the primary grinding of nickel ore with a speciic mineralogical texture. This method developed by Donda ... See full document
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