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Advisor(s)
Abstract(s)
Neste trabalho, apresentam‐se e discutem‐se os resultados da aplicação da técnica de
amostragem linear de descontinuidades em faces expostas do maciço rochoso da pedreira
granítica de Monteiras (Coira d’Além, Castro Daire; NW de Portugal). É, igualmente, utilizada
informação sobre a rede de fracturação regional, obtida através da análise morfoestrutural de
mapas topográficos e mapas geológicos. São ainda referidos os métodos utilizados no tratamento
dos dados de terreno com o objetivo de definir as famílias de descontinuidades e de caracterizar
estatisticamente a sua atitude, espaçamento e extensão. Os resultados obtidos são comparados,
à mega e macroescala, no sentido de averiguar a presença de um padrão de fracturação com
dimensão multi‐escala. A aplicação desta técnica para a caracterização da compartimentação do
maciço poderá contribuir para aperfeiçoar a gestão sustentável do georrecurso da pedreira de
Monteiras.
This work presents the results of the structural geomorphology/geology and geotechnics studies for the block size of a granitic rock mass. For this characterisation, the scanline sampling technique of discontinuities has been applied to the study of free rock mass faces from Monteiras granitic quarry (Coira d’Além, Castro Daire; N Portugal). For that purpose, the surrounding area of the open quarry, as well as selected granitic outcrops, were studied using the following tools: surface geomorphological/geological mapping, structural geology and geotechnics/geomechanics techniques. Thus, a morphotectonic analysis of topographic map and geological survey has then been carried out. In addition, the evaluation methods of field data for discontinuities sets and the statistical characterisation of their orientation, spacing and extension are also presented. The results achieved at different scales are compared in order to detect the presence of a multiscale fracture network pattern. The use of these techniques for understanding the rock mass block size may contribute to improve the sustainable management of the georesources from Monteiras granitic quarry.
This work presents the results of the structural geomorphology/geology and geotechnics studies for the block size of a granitic rock mass. For this characterisation, the scanline sampling technique of discontinuities has been applied to the study of free rock mass faces from Monteiras granitic quarry (Coira d’Além, Castro Daire; N Portugal). For that purpose, the surrounding area of the open quarry, as well as selected granitic outcrops, were studied using the following tools: surface geomorphological/geological mapping, structural geology and geotechnics/geomechanics techniques. Thus, a morphotectonic analysis of topographic map and geological survey has then been carried out. In addition, the evaluation methods of field data for discontinuities sets and the statistical characterisation of their orientation, spacing and extension are also presented. The results achieved at different scales are compared in order to detect the presence of a multiscale fracture network pattern. The use of these techniques for understanding the rock mass block size may contribute to improve the sustainable management of the georesources from Monteiras granitic quarry.
Description
Keywords
Geomecânica Descontinuidades Técnica de amostragem linear Maciços rochosos Georrecursos N de Portugal Geomechanics Discontinuities Scanline sampling technique Rock masses Georesources N Portugal