Correlations of rock mass classifications applied to ferruginous caves.
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFOP |
Texto Completo: | http://www.repositorio.ufop.br/handle/123456789/12648 https://doi.org/10.1590/0370-44672019730017 |
Resumo: | For the Brazilian iron ore mines, the presence of caves presents a challenge, since most of them are located within the ore deposit. The National Environment Commission (CONAMA 347 Resolution/2004) establishes that the speleological heritage, as well as its area of influence, cannot sustain irreversible environmental impacts. The physical integrity of caves adjacent to mining operations is an issue of pivotal importance to be scrutinised in studies towards the delimitation of the cave’s protection radius. This article presents the study of various models of correlation between the RMR and Q systems used for the stability assessment of natural iron ore caves. In order to study a correlation between the RMR and Q systems, the most popular rock mass classifications, and their application as a validation tool, a selection of measurements of Q and RMR, organized in a database from seven natural caves of ferruginous lithology, are submitted to a study and statistical analysis. An empirical equation was obtained from the data, using a simple linear regression. The result of the regression was compared with selected correlation equations and the best fit for the data was chosen. The best fit was the Rutledge & Pearson correlation equation, which presented the best combination of R² and S, after the equation created on basis of the real values for RMR, though the other equations have results similar to it. As the results were quite similar, the recommendation still is that correlations should be used with caution, and associated to other methods and field analysis. |
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Oliveira, Paula Cristine LealLima, Hernani Mota de2020-08-26T15:36:39Z2020-08-26T15:36:39Z2020OLIVEIRA, P. C. L.; LIMA, H. M. de. Correlations of rock mass classifications applied to ferruginous caves. REM - International Engineering Journal, Ouro Preto, 73, n. 2, p. 267-272, abr./jun. 2020. Disponível em: <https://www.scielo.br/scielo.php?script=sci_arttext&pid=S2448-167X2020000200267&tlng=en>. Acesso em: 10 mar. 2020.1807-0353http://www.repositorio.ufop.br/handle/123456789/12648https://doi.org/10.1590/0370-44672019730017For the Brazilian iron ore mines, the presence of caves presents a challenge, since most of them are located within the ore deposit. The National Environment Commission (CONAMA 347 Resolution/2004) establishes that the speleological heritage, as well as its area of influence, cannot sustain irreversible environmental impacts. The physical integrity of caves adjacent to mining operations is an issue of pivotal importance to be scrutinised in studies towards the delimitation of the cave’s protection radius. This article presents the study of various models of correlation between the RMR and Q systems used for the stability assessment of natural iron ore caves. In order to study a correlation between the RMR and Q systems, the most popular rock mass classifications, and their application as a validation tool, a selection of measurements of Q and RMR, organized in a database from seven natural caves of ferruginous lithology, are submitted to a study and statistical analysis. An empirical equation was obtained from the data, using a simple linear regression. The result of the regression was compared with selected correlation equations and the best fit for the data was chosen. The best fit was the Rutledge & Pearson correlation equation, which presented the best combination of R² and S, after the equation created on basis of the real values for RMR, though the other equations have results similar to it. As the results were quite similar, the recommendation still is that correlations should be used with caution, and associated to other methods and field analysis.All content of the journal, except where identified, is licensed under a Creative Commons attribution-type BY. Fonte: o próprio artigo.info:eu-repo/semantics/openAccessIron oreLinear regression modelCorrelations of rock mass classifications applied to ferruginous caves.info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleengreponame:Repositório Institucional da UFOPinstname:Universidade Federal de Ouro Preto (UFOP)instacron:UFOPLICENSElicense.txtlicense.txttext/plain; charset=utf-8924http://www.repositorio.ufop.br/bitstream/123456789/12648/2/license.txt62604f8d955274beb56c80ce1ee5dcaeMD52ORIGINALARTIGO_CorrelationsRockMass.pdfARTIGO_CorrelationsRockMass.pdfapplication/pdf1321687http://www.repositorio.ufop.br/bitstream/123456789/12648/1/ARTIGO_CorrelationsRockMass.pdf6cbc42a57e9fe41da33dd241d9a06a69MD51123456789/126482020-08-26 11:36:39.046oai:localhost: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ório InstitucionalPUBhttp://www.repositorio.ufop.br/oai/requestrepositorio@ufop.edu.bropendoar:32332020-08-26T15:36:39Repositório Institucional da UFOP - Universidade Federal de Ouro Preto (UFOP)false |
dc.title.pt_BR.fl_str_mv |
Correlations of rock mass classifications applied to ferruginous caves. |
title |
Correlations of rock mass classifications applied to ferruginous caves. |
spellingShingle |
Correlations of rock mass classifications applied to ferruginous caves. Oliveira, Paula Cristine Leal Iron ore Linear regression model |
title_short |
Correlations of rock mass classifications applied to ferruginous caves. |
title_full |
Correlations of rock mass classifications applied to ferruginous caves. |
title_fullStr |
Correlations of rock mass classifications applied to ferruginous caves. |
title_full_unstemmed |
Correlations of rock mass classifications applied to ferruginous caves. |
title_sort |
Correlations of rock mass classifications applied to ferruginous caves. |
author |
Oliveira, Paula Cristine Leal |
author_facet |
Oliveira, Paula Cristine Leal Lima, Hernani Mota de |
author_role |
author |
author2 |
Lima, Hernani Mota de |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Oliveira, Paula Cristine Leal Lima, Hernani Mota de |
dc.subject.por.fl_str_mv |
Iron ore Linear regression model |
topic |
Iron ore Linear regression model |
description |
For the Brazilian iron ore mines, the presence of caves presents a challenge, since most of them are located within the ore deposit. The National Environment Commission (CONAMA 347 Resolution/2004) establishes that the speleological heritage, as well as its area of influence, cannot sustain irreversible environmental impacts. The physical integrity of caves adjacent to mining operations is an issue of pivotal importance to be scrutinised in studies towards the delimitation of the cave’s protection radius. This article presents the study of various models of correlation between the RMR and Q systems used for the stability assessment of natural iron ore caves. In order to study a correlation between the RMR and Q systems, the most popular rock mass classifications, and their application as a validation tool, a selection of measurements of Q and RMR, organized in a database from seven natural caves of ferruginous lithology, are submitted to a study and statistical analysis. An empirical equation was obtained from the data, using a simple linear regression. The result of the regression was compared with selected correlation equations and the best fit for the data was chosen. The best fit was the Rutledge & Pearson correlation equation, which presented the best combination of R² and S, after the equation created on basis of the real values for RMR, though the other equations have results similar to it. As the results were quite similar, the recommendation still is that correlations should be used with caution, and associated to other methods and field analysis. |
publishDate |
2020 |
dc.date.accessioned.fl_str_mv |
2020-08-26T15:36:39Z |
dc.date.available.fl_str_mv |
2020-08-26T15:36:39Z |
dc.date.issued.fl_str_mv |
2020 |
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info:eu-repo/semantics/publishedVersion |
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info:eu-repo/semantics/article |
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article |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
OLIVEIRA, P. C. L.; LIMA, H. M. de. Correlations of rock mass classifications applied to ferruginous caves. REM - International Engineering Journal, Ouro Preto, 73, n. 2, p. 267-272, abr./jun. 2020. Disponível em: <https://www.scielo.br/scielo.php?script=sci_arttext&pid=S2448-167X2020000200267&tlng=en>. Acesso em: 10 mar. 2020. |
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http://www.repositorio.ufop.br/handle/123456789/12648 |
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1807-0353 |
dc.identifier.doi.pt_BR.fl_str_mv |
https://doi.org/10.1590/0370-44672019730017 |
identifier_str_mv |
OLIVEIRA, P. C. L.; LIMA, H. M. de. Correlations of rock mass classifications applied to ferruginous caves. REM - International Engineering Journal, Ouro Preto, 73, n. 2, p. 267-272, abr./jun. 2020. Disponível em: <https://www.scielo.br/scielo.php?script=sci_arttext&pid=S2448-167X2020000200267&tlng=en>. Acesso em: 10 mar. 2020. 1807-0353 |
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http://www.repositorio.ufop.br/handle/123456789/12648 https://doi.org/10.1590/0370-44672019730017 |
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