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Geomecânica e Sustimento de Galerias em Jazigos de Carvão com Estrutura Geológica Complexa

Title
Geomecânica e Sustimento de Galerias em Jazigos de Carvão com Estrutura Geológica Complexa
Type
Technical Report
Year
1990
Authors
Carlos Arrais
(Author)
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Mello Mendes
(Author)
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Dinis Gama
(Author)
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José Dutra
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Manuel Santos
(Author)
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Elísio Santos
(Author)
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José Travassos
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Jorge Noronha
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Pinto Barriga
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António Gaspar
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Casimiro Moreira
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Scientific classification
FOS: Engineering and technology > Other engineering and technologies
CORDIS: Technological sciences > Technology > Mining
Associated Institutions
ECD - Empresa Carbonífera do Douro
Other information
Resumo (PT): Este relatório ocupa-se da geomecânica e da sustentação na mina de Germunde, Portugal, e cobre a primeira fase dum programa de investigação intitulado "Geomecânica e Sustentação das Galerias num Jazigo de Carvão em Estrutura Geológica Complexa". Dado que o programa se encontra ainda em curso, mercê de prorrogações do seu prazo de execução, este documento deverá ser considerado como um relatório de progresso, a completar ulteriormente, não obstante os seus primeiros capítulos terem já um carácter praticamente definitivo. Nesses primeiros capítulos são pormenorizados os objectivos do programa, abrangidos pelo respectivo título, e, para os concretizar, são apresentados abreviadamente o enquadramento geológico e o método de exploração da mina de Germunde. São depois enumerados e discutidos os diversos problemas geomecânicos que na mina importa resolver. A caracterização geomecânica do maciço rochoso em que a mina se situa é objecto de particular atenção, desenvolvendo-se um sistema de classificação geomecânica dirigido especialmente à optimização do sustimento a aplicar. Os parâmetros utilizados neste sistema são o tipo de material rochoso ocorrente, investigado à custa de ensaios laboratoriais, e as características da compartimentação; para obtenção destas últimas foi elaborado um programa computacional para tratamento dos dados levantados pelo método das linhas exploratórias. A aplicabilidade deste método foi comprovada num ensaio, que se descreve, com o qual foi possível fazer uma previsão do sustimento a aplicar numa zona de um piso inferior da mina. Neste relatório apresentam-se ainda considerações sobre outros aspectos do programa, ainda em desenvolvimento, nomeadamente os respeitantes ao tratamento de dados de convergência, ao estudo dos diversos tipos de sustimento, visando a respectiva optimização, à instrumentação da mina e ao processamento das informações que com a mesma se espera obter.
Abstract (EN): This report deals with the geomechanics and roof support of the Germunde Mine, Portugal, and covers the first phase of a research program entitled "Geomechanics and Roof Support in a Coal Mine of Complex Geology". Due to the fact that the program is still underway, due to extensions of its initial term, this is considered a progress report, to be completed opportunely, although the first chapters are practically definitive. In these initial chapters the purposes of the research project are detailed, as indicated by its title, and to make them concrete, the geologic setting and mining method of Germunde Mine are briefly presented. Then various geomechanical problems to be solved in the Mine are enumerated and discussed. The geomechanical characterization of the Mine's rock-mass is submited to particular attention and a geomechanical classification system was developed for the optimization of supports to be installed. The parameters used for that system are the existing rock types, their properties as obtained by laboratory tests and the discontinuities characteristics; to obtain these a computer program was developed in order tomprocess data from scan-line surveys. The applicacability of this method was confirmed by a test case, which is described and utilized to predict the types of supports needed for an area of the Mine's deepest level. Also in the report additional considerations on other ongoing aspects of the research program are offered , such as the convergence data processing, the study of alternative support types towards their optimization, new Mine instrumentation and the treatement of information that is expected to result from it.
Language: Portuguese
Type (Professor's evaluation): Scientific
Contact: jgois@fe.up.pt
Reference: Comissão das Comunidades Europeias, Direcção Geral de Energia - D.G. XVII. Convenção n.º 7220/AB/751
No. of pages: 82
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