Título: | GEOLOGICAL AND GEOMECHANICS MODELLING 3D AND STABILITY ANALYSES 2D OF THE SLOPES OF THE MORRO DA MINA MINE, CONSELHEIRO LAFAIETE, MG, BRAZIL | ||||||||||||||||||||||||||||||||||||||||
Autor: |
CRISTIANE SILVA ROCHA DAMASCENO |
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Colaborador(es): |
SERGIO AUGUSTO BARRETO DA FONTOURA - Orientador |
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Catalogação: | 14/AGO/2008 | Língua(s): | PORTUGUESE - BRAZIL |
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Tipo: | TEXT | Subtipo: | THESIS | ||||||||||||||||||||||||||||||||||||||
Notas: |
[pt] Todos os dados constantes dos documentos são de inteira responsabilidade de seus autores. Os dados utilizados nas descrições dos documentos estão em conformidade com os sistemas da administração da PUC-Rio. [en] All data contained in the documents are the sole responsibility of the authors. The data used in the descriptions of the documents are in conformity with the systems of the administration of PUC-Rio. |
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Referência(s): |
[pt] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=12068&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=12068&idi=2 |
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DOI: | https://doi.org/10.17771/PUCRio.acad.12068 | ||||||||||||||||||||||||||||||||||||||||
Resumo: | |||||||||||||||||||||||||||||||||||||||||
This work presents a methodology to develop geological and
geomechanic models (3D) and to carry out stability analyses
(2D) of rock slopes of open pit mine, based on data of Morro
da Mina mine, provided by the mining company VALE. The
methodology is divided in two stages: modelling and
stability analyses. For the modelling, the software Petrel
2004, which allows the use of geostatistical tools, was
used, being possible the spatial distribution of
geotechnical information, obtained from borehole cores, for
the whole rock mass. The technique of Ordinary Kriging was
used. The modeled properties were the following: c`, fi,
RQD, Q e RMR. The generated model represented well the
spatial distribution of these properties. The stability
analyses were carried out using 2D sections and the
necessary rock mass parameters were obtained from
the geomechanical model. Two types of analyses were carried
out: kinematic analyses, with use of the software Dips, from
Rocscience, and limit equilibrium analyses of the global
slopes and the benches, where the software Slide 5.0, also
from Rocscience was used. The Kinematic analyses, carried
out considering two sets of joint orientations, suggested
that the benches have to receive enough attention in this
mine, and the limit equilibrium analyses for circular
failure of the benches and global slopes indicated high
factors of safety. However, before this work initiating a
failure already had happened in one of the sections
analyzed. The programs RocData 4.0 and RocProp, both from
Rocscience, were used to estimate the Mohr-Coulomb strength
parameters, and the programs AutoCAD 2004 and Microsoft
Office Excel helped at the development of the input files in
the Petrel 2004 and Slide 5.0.
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