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Copyright of Revista Foco (Interdisciplinary Studies Journal) is the property of Revista Foco and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The goal of this work is setting out an analysis of the reality of the Xikrin do Cateté indigenous people, focusing on the conflicts with the mining industry in their territory (Carajás Complex). The epistemological approach is grounded on an interdisciplinary analysis, theoretically centered on associating ecological economics and human geography. Methods-wise, we use qualitative research, aiming to understand the conceptual dichotomy between the “banal space” (Milton Santos) and the reality of the “full world” (Herman Daly). We observe that, differently from other historical periods, indigenous people are living surrounded by mining projects, their voices remaining overlooked. Once captured through the perspective of the full world, this territorial configuration is one whereby the indigenous population has no longer any capacity to move, remaining blocked in a region characterised by the most diverse conflicts. [ABSTRACT FROM AUTHOR]

Objective: this essay problematizes destructive organizational practices that produce and perpetuate spaces in ruins. Drawing from the practices of the mining industry in Brazil, exemplified by the rupture of the Fundão dam (MG), we theorize about the contributions of multispecies approaches to Administration. Thesis: we propose, through dialogues between organizational studies and multispecies studies, the concept of a multispecies organizing of space that transcends exclusively human relations. We consider space as both product and process in everyday organizational life, yet we highlight the limitations of the human-centric focus in the literature. We conceptualize spacing as a non-human production of practices entangling humans and actors composing environments and various species of plants, animals, fungi, and other forms of existence. Thus, we challenge a hegemonic view in the field, underscoring the importance of a more inclusive and ethical approach to spatial and organizational practices. Conclusions: we rethink social and organizational dynamics, emphasizing not only mining activity but other corporate practices through a spatialized and more-thanhuman perspective. The essay contributes ontologically by making visible the agency of other living beings in organizational processes and practices, methodologically by decentering the human in research, and politically by analyzing asymmetric power relations. Such contributions enable the promotion of a broader and more responsible understanding of the complex relations between humans and non-humans in organizational contexts. [ABSTRACT FROM AUTHOR]

The mining industry in Peru – as well as in many resource-rich countries of the global South – is of great economic and social importance, particularly in remote regions where mineral deposits are often located. The academic literature has so far neglected analysing how women in these regions are affected by the industry. As such, it is relevant to study the gendered conflict surrounding the activity and invisibility of women in the mining industry, as well as their proposals, demands, and needs, with a focus on environmental and social concerns. This study analysed the experiences of peasant women from Peruvian Andes communities in environmental governance processes in mining contexts as they sought to exercise their citizenship within the mining industry and public spaces. Using a qualitative approach involving a focus group and panel discussions, the experiences and perceptions of the women who are part of the participatory environmental monitoring and surveillance committees (PEMSC) were considered. This paper highlights gendered inequalities concerning the benefits of mining, the process of change in the social dynamics of mining communities, and political claims for a better social arrangement, with social, political, economic, and ecological considerations from the women’s point of view.

Copyright of Pixo: Revista de Arquitetura Cidade e Contemporaneidade is the property of Pixo Revista de Arquitetura Cidade e Contemporaneidade and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In recent decades, industrial heritage tourism has grown significantly and is an expanding economic activity. In Europe, the first initiatives emerged in the 1980s in the United Kingdom and Germany, with the musealization of industrial spaces. In Portugal, this type of initiative began to have a huge impact at the end of the 20th century, largely due to deindustrialization, responsible for the closure and relocation of many factories, leading to the disappearance of much of this heritage. In the Extractive Industry, there are still few cases of musealization of deactivated mining heritage. In the European context, there are already some projects around the recovery of mining heritage, and in Portugal the process for inventorying and classifying this heritage is still in the development phase, with a long way to go in safeguarding these places. The case under study highlights the cultural and tourist potential that the antimony (Sb) and gold mines of Gondomar have in a region with specific geographical and geological characteristics that allowed the exploration of a resource that proved to be important, standing out at a national level. Sb exploration in this region had a period of greater activity at the end of the 19th century with the creation of several mining companies and brought an important development throughout the region, having its closure disastrous consequences on the population and territory. The study carried out on Sb exploration confirms the idea that this sector had a cyclical nature and depended on sudden fluctuations in metal prices, leading to phases of rapid development and expansion, followed by the closure and abandonment of mines. Currently, what remains of most of the Sb mines are ruins surrounded by dense vegetation, making these industrial units, which in other times constituted a great wealth, are now completely abandoned and forgotten. Aware of the richness of this industrial and mining heritage, it is intended to draw up a proposal for the creation of an Interpretive Center that will allow portraying the different stages of mining exploration in the municipality of Gondomar. This project would be an essential complement to the thematic trails already developed by Parque das Serras do Porto and which would rescue spaces and vestiges associated with the old mines, enhancing the heritage and memory of these communities, which were once very dependent on these mining operations. [ABSTRACT FROM AUTHOR]

Copyright of Revista de Historía da Sociedade e da Cultura is the property of Revista de Historia da Sociedade e da Cultura and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This article deals with the productivity of the economy of Paraná, seeking its measurement, evaluation of its sector profile and verification of the status of innovation activity. The modality under analysis is the labor productivity, to which the shift and share method is applied as a way to decompose its growth over the last two decades, in the structural and intra-sectoral components. The results indicate the increase in productivity given mainly by agriculture, along side the stagnation in the industry and the reduced expansion in the service sector. Specifically for the extractive and processing industries, the exercises also show general levels of stagnant productivity. In these industries, the low growth in shift and share analysis results mainly from intra-sectoral gains, concentrated in some branches of activity. In final section, the work points out expressive spaces of expansion of the innovation process across the Paraná production. [ABSTRACT FROM AUTHOR]

Copyright of Desenvolvimento e Meio Ambiente is the property of Universidade Federal do Parana and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Starches are depressant reagents used in mineral flotation in order to confer selectivity to the process. For this, they need to be previously gelatinized, with the alkaline method being the most used technique in the mineral industry. In Brazil, NaOH is used as alkali and the flour/NaOH ratio is a parameter analyzed in this process. Although they are important, studies on this topic are scarce in the literature. That said, the work consisted in determining the ideal flour/ NaOH ratio for the gelatinization of depressants based on corn, sorghum and millet and in proving the effectiveness of the process under optical microscopy with polarized light. Subsequently, flotation tests with niobium ore using corn, millet and sorghum flours and their respective mixtures as depressants were carried out and the results were compared with industrial corn starch. The results showed that the new proposed depressants used smaller amounts of NaOH to be gelatinized in relation to corn starch. The optical microscopy stage confirmed the disruption of Maltese crosses for all flours, indicating complete gelatinization. The best pyrochlore depressant was sorghum flour and the results showed statistical similarity with corn starch. [ABSTRACT FROM AUTHOR]

Carbon capture and storage (CCS) technology has been receiving a lot of attention since the 1990s because it has been chosen as an option for mitigating climate change. The legal and regulatory frameworks necessary for the broad development of this technology are considered incipient in most countries, as in Brazil. This study showed that Brazil doesn't have specific laws for the regulation of CCS. It can be concluded that Brazil can build on existing regulation in the mining and oil industry to develop a specific regulation on CCS. It was possible to observe, based on the existing regulations in the U.K., the E.U., Denmark, Australia, the USA, and Canada, that for regulation to be effective, consideration of factors such as clarity and efficiency of the administrative process of applying for and obtaining approval for CCS projects and long-term liability for closure, monitoring, and accidental releases of CO2 is essential. [ABSTRACT FROM AUTHOR]

Copyright of Cadernos PAGU is the property of Universidade Estadual de Campinas - Portal de Periodicos Eletronicos Cientificos and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Over the past decade, the extraction of ores in Brazil has increased vertiginously, driven by the neodevelopmental program of the governments of the Workers' Party. In order to get a better view of the facts, state investments in the sector, from 2011 to 2016, were over US $ 66 billion. In 2014, only the state of Minas Gerais, which historically constitutes the country's most important mineral production center, produced a mineral balance of US $ 14 billion. This scenario, however, has been responsible for a set of contradictions to great extent, as it has been demonstrated in the case of Paracatu, a municipality of Minas Gerais. Our research sought to identify the social and environmental impacts that have been provoked by the mining industry in this municipality. In methodological terms, we set up the politicaleconomic conditions under which the mining activity gained centrality in Brazil. Then, based on the available literature, we identified some contradictions on the expansion of this economic activity in the municipality of Paracatu, manifested in the form of socioenvironmental conflicts. Finally, we presented the public health situation, based on the report given to us by a distinguished local scientist in the area. [ABSTRACT FROM AUTHOR]

Copyright of Environmental & Social Management Journal / Revista de Gestão Social e Ambiental is the property of Environmental & Social Management Journal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The mineral industry generates large amounts of tailings, and because of many accidents that have occurred with conventional dams, studies focus on tailings dewatering before their disposal. This study evaluates the properties of the red mud to determine their rheological behavior and stability for disposal in dams. For this, the red mud was flocculated with commercial cationic polymer and thickened. The thickened tailing was submitted to rheological tests with the vane rotor and slump test, in order to obtain information about yield stress and slump height of the tailings. The results show a strong influence of the initial solids concentration in particle aggregation, which could be noticed by the increase in particle cohesion and yield stress of thickened tailings; besides reduction of the slump height with the increase of initial solids concentration. It was possible to produce thickened tailings, reaching τ0 = 160 Pa, very close to the value specified for mineral paste, besides up to 90% water recover. [ABSTRACT FROM AUTHOR]

Studies involving tailings have raised mineral industry awareness because of its potential to increases in production as well as a reduction of the environmental liabilities. The main material of this study is an iron ore tailing from the Mineração Usiminas-MG-Brazil dam, collected through probe holes and characterized by size, chemical e mineralogical analyses. Flotation assays were also carried out, evaluating the ground corn (Flotamil75 and Flokit415) and cassava flour (FF01 and FF73) depressant action, aiming at achieving a concentrate adequate for use in the metallurgical industry. The size distribution of the tailing indicated 25% passing 10 μm and 15% above 297 μm, which was adjusted by classification and desliming. The Fe and SiO2 contents were 44.3% and 30.9%, respectively. The main mineral identified were hematite and quartz, and to a lesser extent, ferruginous earthy aggregates. In the analysis of the depressants, the cassava flour presented higher water absorption index and lower pH, compared to ground corn. The cassava flour FF73 reached the best performance in the flotation: metallurgical recovery 75.88% and 2.24% sio2 in concentrate. [ABSTRACT FROM AUTHOR]

Copyright of Nova Economia is the property of Nova Economia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Anuario do Instituto de Geociencias is the property of Universidade Federal do Rio de Janeiro, Instituto de Geociencias and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Anuario do Instituto de Geociencias is the property of Universidade Federal do Rio de Janeiro, Instituto de Geociencias and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of REUNIR: Revista de Administração, Contabilidade e Sustentabilidade is the property of REUNIR - Revista de Administracao, Contabilidade e Sustentabilidade and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This paper analyses the territory of the southeastern mesoregion of the Pará State, as one of the preferential locus of conflicts that involves different social actors and the mining companies, besides contesting analytically the form of the economic and social development adopted by the Brazilian government in the Amazon of the Pará State at the dawn of the 21st century. The southeastern mesoregion of the Pará State is the most affected by the mining activities of the principal mineral company of the State, the Valle Company. These social and territorial impacts have brought into debate if the mining is the only way of regional development. The conflicts of interests among the populations directly affected and the mineral policy in the Amazon region, have raised a broad debate in the affected societies in the last 30 years of the mineral exploration in the region, confronting the richness and poverty as a remarkable regional landscape, and proposing to reflect about the effects of the mining activities in the mining towns of the Pará State. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Business & Projects / Revista de Gestão e Projetos is the property of Revista de Gestao e Projetos and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista de Historía da Sociedade e da Cultura is the property of Revista de Historia da Sociedade e da Cultura and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The article offers mining news briefs of Brazil. Mining engineer Francisco Sette Bicalho died on April 14, 2015 in Belo Horizonte, Brazil. The Brazilian Navy received the hydrographic research vessel "Vital de Oliveire" on July 23, 2015 to be used for water prospecting of mineral resources. The Instituto Brasileiro de Mineração (IBRAM) will be holding the 16th Brazilian Mining Congress and the International Mining Exhibition from September 14-17, 2015 in Belo Horizonte.

Copyright of Revista de Administração e Inovação (RAI) is the property of Revista de Administracao e Inovacao- RAI and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Opara: Ciências Contemporâneas Aplicadas is the property of Revista OPARA and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This study aim to analyze the structure of a Local Productive Arrangement (LPA) in the mining sector in one Brazilian Microregion, through the description of their origin, the mapping of productive agents and institutions involved, the explanation of its structure, based on variables related to external economies and internal economies, and identify their stage of evolution. This is a qualitative, descriptive, exploratory and documentary, in the form of case study, which used as a tool for data collection a semi structured interview guide used with the managers of the mining cooperatives. Data were analyzed using the technique of content analysis, under a closed procedure, and document analysis. The main result of the research is that the LPA is in transition from the embryonic stage to growth, once, according to the model adopted in the study, their structure has characteristics of both stages. The study demonstrates to be relevant for treating strategic improvements in the way we manage our business, proposed by forming partnerships between organizations or interorganizational relations of productive cooperation, with an objective to obtain competitive advantages. [ABSTRACT FROM AUTHOR]

Copyright of Revista Tamoios is the property of Editora da Universidade do Estado do Rio de Janeiro (EdUERJ) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Business & Projects / Revista de Gestão e Projetos is the property of Revista de Gestao e Projetos and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Cadernos de Terapia Ocupacional da UFSCar is the property of Cadernos de Terapia Ocupacional da UFSCar and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Hydrocyclones are devices worldwide used in mineral processing for desliming, classification, selective classification, thickening and pre-concentration. A hydrocyclone is composed by one cylindrical and one conical section joint together, without any moving parts and it is capable of perform granular material separation in pulp. The mineral particles separation mechanism acting in a hydrocyclone is complex and its mathematical modelling is usually empirical. The most used model for hydrocyclone corrected cut size is proposed by Plitt. Over the years many revisions and corrections to Plitt's model were proposed. The present paper shows a modification in the Plitt's model constant, obtained by exponential regression of simulated data for three different hydrocyclones geometry: Rietema, Bradley and Krebs. To validate the proposed model literature data obtained from phosphate ore using fifteen different hydrocyclones geometry are used. The proposed model shows a correlation equals to 88.2% between experimental and calculated corrected cut size, while the correlation obtained using Plitt's model is 11.5%. [ABSTRACT FROM AUTHOR]

The traditional method for the disposal of slurry in tailing dams requires large areas, with large environmental impact and therefore makes it difficult to acquire new licenses. The proximity of urban areas, together with public pressure, has raised the need to seek alternatives for this methodology. A viable solution to this issue will contribute to the environmental licensing process for new projects, ensuring the survival of mining in the Iron Quadrangle. Laboratory-scale filtration tests were conducted with tailing's samples using the main filtering technologies: vacuum filtration, pressure, hyperbaric and capillary filters. The results showed that with the exception of the slimes, it is possible to filter the tailings from the processing plants with a good filtration rate and residual moisture suitable for stacking. The filtration of slimes under pressure resulted in low filtration rate and high residual cake moisture (around 20%). The resulting cake could be mixed with the coarse tailings and / or mine waste to facilitate its stacking, although it requires further geotechnical studies. [ABSTRACT FROM AUTHOR]

Copyright of Revista Gestão & Tecnologia is the property of Revista Gestao & Tecnologia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista de Ciências da Administração is the property of Universidade Federal de Santa Catarina, Departamento de Ciencias da Administracao and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The article discusses various aspects of promotion of mining industries in Ouro Preto, Brazil which provides several opportunities to generate revenue. It highlights that the collected revenues can help in providing quality services to the public. It also analyzes dependency of residents in Ouro Preto, Brazil for their financial income that comes through the mining industries.

This study presents the results obtained using geostatistical simulation techniques combined with pit optimization and sequencing to assess the grade uncertainty impact in mine planning and reserve assessment. Traditional approaches use an estimated model by geostatistical methods (Ordinary Kriging, Indicator Kriging) or even classical methods of estimation (IPD, polygons, moving average). In the same manner, to evaluate mining projects, analyses considering economical sensitivity aspects were made, disregarding the uncertainty of the geological model. This study demonstrates that grade estimation can have a relevant impact on the uncertainty over mining projects, even in the open pit design, i.e. in the feasibility study. [ABSTRACT FROM AUTHOR]

This paper discusses the results of a mixed grinding simulator application based on an artificial neural network (multiple-layer perceptron using a back-propagation-like algorithm with moment). The data used came from a previous paper entitled "Selective grinding of dolomite and quartz mixes". The Shewhart control chart for individual values was used in order to verify the statistical stability of the simulation process results, which was useful for testing acceptance. The results have displayed good performance of this tool related to mix grinding simulation, a common issue in the mining and metallurgical sectors. [ABSTRACT FROM AUTHOR]

Logistics has become a decisive process for the survival of companies. Logistic aspects are responsible for the flow of materials and information from the supplier to the consumer, and have a direct impact on the performance of companies, as well as on the costs of the products and services they offer. This is enough to justify the addition of logistic aspects as tools for analysis and material selection. This work aims at presenting the development of a model for the selection of metallic material, which considers the logistic aspects on the decision process. For this reason, we have used an adaptation of the PERT net (Program Evaluation and Review Technique), relating indicators of variables from material selection with those from logistics. For the purpose of validation, we then implemented the model and presented it to experts of the mining-metallurgical sector. These experts had previously reported a lack of management systems that support the selection process relating to material and logis-tic information. As a result, they considered the proposed model to be an important instrument for undertaking managerial decisions. [ABSTRACT FROM AUTHOR]

Women are gaining space in the public sphere, in relation to the labor market and social representations. In this context, the mineral extraction sector stands out, as it has been accepting women in all its functional extensions. Given this, we intend to analyze the process of gender relations in the organizational context of a mining company. Discussions that guide the study of gender relations and subjectivity in work are used as reference. Research methodology is based on social phenomenology as conceived by Alfred Schütz. We conclude that women have managed gains in the mining industry, but these achievements are due to masculinization, as in fact there is no respect and appreciation for their differences. The legitimacy of women's work occurs only according to existing standards of male performance. Thus, this work is relevant in its contribution to scientific research on gender, and to study the relationships between men and women in an environment with such unique characteristics as the mining industry. In addition, the work features a unique use of phenomenology in social research on gender and might serve as a reference for future investigations. [ABSTRACT FROM AUTHOR]

Copyright of Revista Ciência & Saúde Coletiva is the property of Associacao Brasileira de Pos-Graduacao em Saude Coletiva and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Anuario do Instituto de Geociencias is the property of Universidade Federal do Rio de Janeiro, Instituto de Geociencias and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Philosophy & History of Biology / Filosofia e História da Biologia is the property of Associacao Brasileira de Filosofia e Historia da Biologia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Underground mine planning is an important element for achieving project re-alization in the current highly competitive scenario. This is due to the peculiarities of the underground mines, where it is difficult to obtain profound knowledge about the body and location of the underground excavations. Computer applicationsspatially visualize the ore body with its geological sec-tions and mineral formation contours. This visual is in 3D that facilitates the alloca-tion of major mine development services. Although such resources are available, their mining applications are generally developed for open pit mining methods, and is still incipient for underground mine-development methodologies. With the use of applications for mine development and planning, and the simi-larity of existing mines, it was possible to prepare the infrastructure project for a specific underground mine, and a 3D view of its underground openings. It was also possible to develop a methodology for drawing the galleries described. This paper deals with the selection of mining methods for a major simulated mineral deposit and describes breakthroughs of underground mine development de-sign using a commercial mining application. [ABSTRACT FROM AUTHOR]

In underground mining, daily a fleet of LHDs must be allocated to a haulage network of drifts for extracting ore according to a plan-driven strategy. This plan is hierarchically decided by a higher management level and it contains the number of ore bucketfuls to be extracted from each drawpoint within a drift for each working shift. In this paper, an integer programming (IP) model for minimizing the makespan of drift workload is formulated and a polynomial time optimal algorithm for its resolution is proposed. Next, a set of decision rules obtained from the algorithm above is integrated into the decision-making process (DMP). This DMP is simple to execute for LHD operators, determines the optimal makespan, and whether or not it can be carried out in the working shift. Finally, a comparative analysis between the DMP proposed and the DMP used in El Teniente copper underground Chilean mine is studied. The results show that the cumulative operators experience has converged to solutions near to optimal makespan. [ABSTRACT FROM AUTHOR]

Varieties of kaolin ore were sampled from a sedimentary deposit in Pará state and processed in a pilot plant for spectrocolorimetry studies. The aim was to provide a tool for the mining and processing operations. Ores like that contain textural and mineralogical variations that define whether the ore blocks may or may not be processed. The decision making depends, first, on the ore color subjective analysis: reddish blocks are inappropriate, but the whitish ones are appropriate. The ore color depends on the mineral paragenesis contaminant. Fifteen representative samples of five varieties of kaolin were analyzed under different parameters. These samples were visually defined by the ore color. The reflectance curves of the sandless product defined seven spectrocolorimetric groups, four of which were appropriate for generating a quality product for the market. This study presents both the analyses and the results for each group, what they represent as a tool to support the mining and processing operations, and some considerations about the blending among the kaolin groups. [ABSTRACT FROM AUTHOR]

The article focuses on the study conducted to examine the availability of the kaolin from Quadrilátero Ferrífero for the ceramic industry. It mentions seven samples were characterized by physical, mineralogical and chemical analyses in an effort to determine their use in the ceramic industry. Further it mentions the variations in the Fe2O3 is due to presence of goethite and hematite which shows different colors.

The article focuses on the study conducted to examine significance of ceramics in the external cylindrical plunge grinding. It mentions ceramic materials plays important role over other materials. Ceramics has the capability of operating at high temperatures, high hardness and have high wear resistance. It also explores the method of lubrication in the cylindrical grinding using the technique of minimum quantity of lubrication (MQL).

Reconciliation can be divided into stages, each stage representing the performance of a mining operation, such as: long-term estimation, short-term estimation, planning, mining and mineral processing. The gold industry includes another stage which is the budget, when the company informs the financial market of its annual production forecast. The division of reconciliation into stages increases the reliability of the annual budget informed by the mining companies, while also detecting and correcting the critical steps responsible for the overall estimation error by the optimization of sampling protocols and equipment. This paper develops and validates a new reconciliation model for the gold industry, which is based on correct sampling practices and the subdivision of reconciliation into stages, aiming for better grade estimates and more efficient control of the mining industry's processes, from resource estimation to final production. [ABSTRACT FROM AUTHOR]

Several mining companies operating in Brazil have been preparing mine closure plans describing end of life actions to ensure long term physical stability, land rehabilitation and, to a certain extent, socioeconomic measures. Most Brazilian and international guidelines, however, skip early closure and only feature guidance to closure planning after reserve depletion. In this paper, two cases of early closure in Australia are reviewed, causes for early closure are explored, criteria to evaluate preparedness to early mine closure are proposed and tested in two mines. It concludes that, despite recent advances, planning for mine closure seldom take account of early closure risks. [ABSTRACT FROM AUTHOR]

Even with the financial crisis of 2008, the steel consumption forecast for the BRIC countries - Brazil, Russia, India and China - is for a significant increase over the next decades, due to their present low per-capita consumption level. The start up of new mines to supply this increase in demand is likely to be limited due to legal and practical restrictions related to environmental, social, manpower and energy issues. Therefore, most of the new demand for iron ore will be supplied by increasing the productivity of mines currently in operation. The main challenges for managing mine productivity are related to the choice of the estimation method, due to the difficulties in collecting appropriate information and to the establishment of a representative model. This article presents an estimation approach for mine productivity estimation through multiple regressions over the operational database of the mine. The approach is proposed through a Mine Productivity Estimation and Management tool (MPEM) which can deliver savings related to increased production efficiency by the identification and removal of losses in the mine production flow. Production improvement has been actually achieved in practical applications by managing the discrepancies in the KPIs of different operating shift crews. The operational variables have been identified directly over the operational database of the mine and the model has been developed in a simple and easy-to-use fashion, with excellent levels of correlation between the estimated and actual values of the mine's productivity. The article describes the development approach as well as the application of the model in a case-study. [ABSTRACT FROM AUTHOR]