Mining Sequencing
Mostrando 1-12 de 32 artigos, teses e dissertações.
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1. Multi-stage dumping sequence - a feasible waste management alternative for open pit mining
Abstract Waste management and environmental aspects are progressively gathering attention in the mining industry. Mine planners must deal with increasingly complex tasks to balance between ore block schedules, waste disposal, operational cost and environmental reclamation. The mine incomes are generally related to mining and processing of the ore, thus most
REM, Int. Eng. J.. Publicado em: 2021-06
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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. 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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5. Direct sequencing of blocks in stochastic models with multi-mines and multi-destinations
Abstract Mining Scheduling is the one that maximizes profit from mining over time. By means of computational methods, the deposit is discretized in blocks and algorithms are used to consummate this objective. The methods that are widely known nowadays for mining scheduling optimization of a discrete block model were based on graph theory, and among those mos
REM, Int. Eng. J.. Publicado em: 16/09/2019
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6. 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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7. Discovery and characterization of SSR markers in Eugenia uniflora L. (Myrtaceae) using low coverage genome sequencing
Abstract: Eugenia uniflora L. (Myrtaceae) is a tree species widely distributed in South America suffering the effects of the exploitation of natural populations. In this study, we employed low coverage sequencing of the E. uniflora genome for mining of SSR markers. The de novo assembly generated 2,601 contigs with an average length of 1139 bp and spans 3.15
An. Acad. Bras. Ciênc.. Publicado em: 08/04/2019
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8. Heterologous Expression of a Putative ClpC Chaperone Gene Leads to Induction of a Host Metabolite
Genome mining provides exciting opportunities for the discovery of natural products. However, in contrast to traditional bioassay-guided approaches, challenges of genome mining include poor or no expression of biosynthetic gene clusters (BGCs). Additionally, given that thousands of BGCs are now available through extensive genome sequencing, how does one sele
J. Braz. Chem. Soc.. Publicado em: 2019-03
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9. Gene Deletion Leads to Improved Valinomycin Production by Streptomyces sp. CBMAI 2042
The genus Streptomyces represents one of the largest producers of molecules with antibiotic activity. The whole genome sequencing of the endophytic microorganism Streptomyces sp. CBMAI 2042 revealed 35 gene clusters encoding for secondary metabolism including 3 non-ribosomal peptide synthetases (NRPS) and 7 NRPS-hybrids. Combining genome mining and cultivati
J. Braz. Chem. Soc.. Publicado em: 2019-03
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10. Isolation, Characterization and Symbiotic Efficiency of Nitrogen-Fixing and Heavy Metal-Tolerant Bacteria from a Coalmine Wasteland
ABSTRACT: Areas affected by coal mining can be recovered by revegetation with leguminous plants associated with nitrogen-fixing bacteria. This study addressed the isolation and characterization of native nitrogen-fixing bacteria from coalmine wasteland under different vegetation restoration approaches using Macroptilium atropurpureum (DC) Urb and Vicia sativ
Rev. Bras. Ciênc. Solo. Publicado em: 13/09/2018
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11. Occurrence of Yeast Species in Soils under Native and Modified Vegetation in an Iron Mining Area
ABSTRACT Soils of the Quadrilátero Ferrífero are rich in mineral resources, especially gold and iron. Soil management and mining activities greatly impact soil biology. However, studies addressed to the diversity of microorganisms and their ecological role in the recovery of these areas are scarce. This study aimed to assess the yeast occurrence in soils w
Rev. Bras. Ciênc. Solo. Publicado em: 26/07/2018
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12. Direct block scheduling under marketing uncertainties
Abstract Mineral projects are composed of geological, operational and market uncertainties, and reducing these uncertainties is one of the objectives of engineering. Most surveys assess the impact of geological and operational uncertainties on the mining planning. The objective of this work is to study the impact of market uncertainty on the mineral activity
REM, Int. Eng. J.. Publicado em: 2018-04