Underground Mining
Mostrando 13-24 de 39 artigos, teses e dissertações.
-
13. Classificação geomecânica em projetos de reforço do teto em mineração de carvão
O dimensionamento dos pilares e do reforço do teto em mineração subterrânea de carvão deve levar em consideração parâmetros como o comportamento geomecânico do maciço rochoso e os equipamentos de lavra empregados. Esse artigo demonstra o método de classificação geomecânica baseado no Coal Mine Roof Rating (CMRR), uma ferramenta de engenharia qu
Publicado em: 2010
-
14. Construção de um modelo computacional para o circuito de ventilação da Mina Esperança
A ventilação em uma mina tem como principal objetivo o fornecimento de um fluxo de ar puro a todos os locais de trabalho em subsolo, em quantidades suficientes para assegurar as condições de higiene e segurança dos trabalhadores. A análise da eficiência ou do dimensionamento de um circuito de ventilação pode ser feita por meio de técnicas diretas d
Publicado em: 2010
-
15. Impactos socioambientais e implicações à saúde do trabalhador: o caso do garimpo de esmeraldas em Campos Verdes-GO / Socio-environmental Impacts and its implication to the health of mining workes: The case of the mining emerald in Campos Verdes-GO
This research aims at analyzing the socio-environmental problem and the consequences to the workers at the emerald mining fields located in Campos Verdes to the north of the state of Goias Brazil. The area being studied is situated between the parallels 14.25 and 14.30 degrees of south latitude and the meridians of 49.55 and 50.55 degrees of west longitude,
Publicado em: 2009
-
16. Classificação do maciço rochoso e caracterização das brechas da mina subterrânea de Vazante-MG / Rock mass classification and the breccias of the underground mine of Vazante-MG characterization
Esta dissertação descreve o maciço rochoso da mina subterrânea de Vazante e algumas importantes características geomecânicas das brechas, ou bimrocks, que ocorrem em subsolo na área da mina. Realizaram-se mapeamentos geológico-geotécnicos sistemáticos dos principais níveis da mina, que permitiram a individualização de quatro famílias de descont
Publicado em: 2009
-
17. Modelo de gestão compartilhada de bacias hidrograficas e hidrogeologicas : estudo de caso - Aquifero Guarani / Shared management model of river basins and groundwater : a case study - Guarani Aquifer
This thesis attempts to bring the issue of management of water resources in Brazil emphasizing the groundwater, and promoting ideas and proposals for appropriate improvements on the management of these resources. Furthermore, it tries to contributing to the sustainable development and rational use of water availability. Thus, from the study of Federal Consti
Publicado em: 2009
-
18. Methodology for the interpretation of the control of underground excavations. / Metodologia para a interpretação do monitoramento de escavações subterrâneas.
This thesis studies prediction, occurrence and monitoring of movements in rock and soil masses in underground excavations, it is emphasized that the study bases fundamentally on monitoring. A technical methodology is proposed for analysis and interpretation of time series from geotechnical instrumentation measurements, based on geomechanical criteria and cla
Publicado em: 2007
-
19. Chromosomal aberrations in peripheral lymphocytes from male native miners working in the Peruvian Andes
We analyzed the frequency of chromosomal aberrations in peripheral lymphocytes from underground miners from the Casapalca (n = 8, mean age = 45 y, range = 36 y to 55 y) and Bellavista (n = 8, mean age = 28 y, range 23 y to 34 y) high-altitude mining camps in the Peruvian Andes. This population was occupationally exposed to heavy metals such as lead and zinc
Genetics and Molecular Biology. Publicado em: 2007
-
20. Perfil geológico-geotécnico do subsolo ao longo do traçado do metrô de Goiânia / Geological-geotechnical profile of the subsoil along the Goiânia suway alignment
The building of the Goiânia subway is one of the items in the Proposal for Life Quality Improvement and Social Inclusion of the population of the Metropolitan Region of Goiânia (MRG), involving the municipal administrations of Goiânia and Aparecida de Goiânia. The proposal, which is part of the rearrangement of the MRG public transport system and follows
Publicado em: 2007
-
21. Estudo do fluxo de material fragmentado na mineração subterrânea, com o uso de modelos físicos
The main objective of this work was the study of gravity flow in excavations, mainly ore passes, in underground mining, by use of physical models. At review of literature it is presented terminology, flow properties of bulk materials, laws of gravity flow, flow design, flow patterns, flow phenomena, such as arching and rat holing, issues of security at work
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/02/2005
-
22. As causas da ineficacia da legislação brasileira na proteção a saude e segurança do trabalhador na mineração carbonifera : aspectos de meio ambiente do trabalho
The mining is a strategic activity of great importance for the economical development of Brazil, however, it is potentially degrading, offering risks for the environment, collectivity and to the workers employed in the extraction of ores. The mining workers are exposed in physical, chemical, biological and psychological factors that should be eliminated, or
Publicado em: 2002
-
23. Determinants of chronic bronchitis and lung dysfunction in Western Australian gold miners.
The relation of chronic bronchitis and respiratory dysfunction to age, tobacco smoking, and occupational exposure to surface and underground mining operations were examined in a cross sectional survey of 1363 men employed in the Kalgoorlie mining industry in 1985. Overall, the prevalence of chronic bronchitis was 14%. Eleven per cent of the workers had obstr
-
24. Gastric cancer in coal miners: a case-control study in a coal mining area.
In collaboration with three pathology departments a case-control study was conducted in the southern part of the Netherlands to investigate the risk of gastric cancer in coal miners. Between 1 January 1973 and 31 December 1983, 323 male patients were diagnosed as having a malignant neoplasm of the stomach. For each case a control was selected from the same p