Physical stability of iron ore caves: geomechanical studies of a shallow underground cave in SE Brazil

Detalhes bibliográficos
Autor(a) principal: Brandi,Iuri
Data de Publicação: 2019
Outros Autores: Sebastião,Cristiane Silva, Ferreira,Mauri Lopes, Lima,Hernani Mota de, Gama,Maria Filipa P.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: REM - International Engineering Journal
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2448-167X2019000300217
Resumo: Abstract Caves hosted in iron formations are attracting considerable interest due to their scientific and environmental value. Some of these caves are located in or near iron ore mine sites, which represent an important source of income to Brazil. However, the Brazilian legislation requires speleological studies that currently have an impact upon ore reserves and environmental licensing processes. The aim of this study was to apply conventional geotechnical empirical approaches to a cave located within the grounds of an iron ore mine in the Iron Quadrangle and validate it with numerical modelling, to ensure the method's applicability to natural caves under mining activity influence. These studies comprised the mapping of structural, geotechnical and geomechanical features of rocks hosting and surrounding the cave and to propose geotechnical domains. Field data collection covered the geotechnical parameters necessary to calculate the characteristic Mining Rock Mass Rating (MRMR) for each geotechnical domain, and to evaluate the stability conditions using the stability index or hydraulic radius of the cave. These geotechnical parameters were then used to calculate the physical parameters used in two-dimensional numerical simulations to verify the good stability conditions of the cave, corroborating the adequacy of Laubscher's diagram. The results of this study, although comprising only one cave, suggest that Laubscher's diagram is applicable for assessing the geotechnical behavior of iron ore caves.
id FG-1_a1f32938df86eb815d3e920f2b5eff74
oai_identifier_str oai:scielo:S2448-167X2019000300217
network_acronym_str FG-1
network_name_str REM - International Engineering Journal
repository_id_str
spelling Physical stability of iron ore caves: geomechanical studies of a shallow underground cave in SE Brazilnatural cavescangalaterite crustgeotechnicsconservationAbstract Caves hosted in iron formations are attracting considerable interest due to their scientific and environmental value. Some of these caves are located in or near iron ore mine sites, which represent an important source of income to Brazil. However, the Brazilian legislation requires speleological studies that currently have an impact upon ore reserves and environmental licensing processes. The aim of this study was to apply conventional geotechnical empirical approaches to a cave located within the grounds of an iron ore mine in the Iron Quadrangle and validate it with numerical modelling, to ensure the method's applicability to natural caves under mining activity influence. These studies comprised the mapping of structural, geotechnical and geomechanical features of rocks hosting and surrounding the cave and to propose geotechnical domains. Field data collection covered the geotechnical parameters necessary to calculate the characteristic Mining Rock Mass Rating (MRMR) for each geotechnical domain, and to evaluate the stability conditions using the stability index or hydraulic radius of the cave. These geotechnical parameters were then used to calculate the physical parameters used in two-dimensional numerical simulations to verify the good stability conditions of the cave, corroborating the adequacy of Laubscher's diagram. The results of this study, although comprising only one cave, suggest that Laubscher's diagram is applicable for assessing the geotechnical behavior of iron ore caves.Fundação Gorceix2019-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S2448-167X2019000300217REM - International Engineering Journal v.72 n.2 2019reponame:REM - International Engineering Journalinstname:Fundação Gorceix (FG)instacron:FG10.1590/0370-44672018720053info:eu-repo/semantics/openAccessBrandi,IuriSebastião,Cristiane SilvaFerreira,Mauri LopesLima,Hernani Mota deGama,Maria Filipa P.eng2019-03-19T00:00:00Zoai:scielo:S2448-167X2019000300217Revistahttps://www.rem.com.br/?lang=pt-brPRIhttps://old.scielo.br/oai/scielo-oai.php||editor@rem.com.br2448-167X2448-167Xopendoar:2019-03-19T00:00REM - International Engineering Journal - Fundação Gorceix (FG)false
dc.title.none.fl_str_mv Physical stability of iron ore caves: geomechanical studies of a shallow underground cave in SE Brazil
title Physical stability of iron ore caves: geomechanical studies of a shallow underground cave in SE Brazil
spellingShingle Physical stability of iron ore caves: geomechanical studies of a shallow underground cave in SE Brazil
Brandi,Iuri
natural caves
canga
laterite crust
geotechnics
conservation
title_short Physical stability of iron ore caves: geomechanical studies of a shallow underground cave in SE Brazil
title_full Physical stability of iron ore caves: geomechanical studies of a shallow underground cave in SE Brazil
title_fullStr Physical stability of iron ore caves: geomechanical studies of a shallow underground cave in SE Brazil
title_full_unstemmed Physical stability of iron ore caves: geomechanical studies of a shallow underground cave in SE Brazil
title_sort Physical stability of iron ore caves: geomechanical studies of a shallow underground cave in SE Brazil
author Brandi,Iuri
author_facet Brandi,Iuri
Sebastião,Cristiane Silva
Ferreira,Mauri Lopes
Lima,Hernani Mota de
Gama,Maria Filipa P.
author_role author
author2 Sebastião,Cristiane Silva
Ferreira,Mauri Lopes
Lima,Hernani Mota de
Gama,Maria Filipa P.
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Brandi,Iuri
Sebastião,Cristiane Silva
Ferreira,Mauri Lopes
Lima,Hernani Mota de
Gama,Maria Filipa P.
dc.subject.por.fl_str_mv natural caves
canga
laterite crust
geotechnics
conservation
topic natural caves
canga
laterite crust
geotechnics
conservation
description Abstract Caves hosted in iron formations are attracting considerable interest due to their scientific and environmental value. Some of these caves are located in or near iron ore mine sites, which represent an important source of income to Brazil. However, the Brazilian legislation requires speleological studies that currently have an impact upon ore reserves and environmental licensing processes. The aim of this study was to apply conventional geotechnical empirical approaches to a cave located within the grounds of an iron ore mine in the Iron Quadrangle and validate it with numerical modelling, to ensure the method's applicability to natural caves under mining activity influence. These studies comprised the mapping of structural, geotechnical and geomechanical features of rocks hosting and surrounding the cave and to propose geotechnical domains. Field data collection covered the geotechnical parameters necessary to calculate the characteristic Mining Rock Mass Rating (MRMR) for each geotechnical domain, and to evaluate the stability conditions using the stability index or hydraulic radius of the cave. These geotechnical parameters were then used to calculate the physical parameters used in two-dimensional numerical simulations to verify the good stability conditions of the cave, corroborating the adequacy of Laubscher's diagram. The results of this study, although comprising only one cave, suggest that Laubscher's diagram is applicable for assessing the geotechnical behavior of iron ore caves.
publishDate 2019
dc.date.none.fl_str_mv 2019-06-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2448-167X2019000300217
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2448-167X2019000300217
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/0370-44672018720053
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Fundação Gorceix
publisher.none.fl_str_mv Fundação Gorceix
dc.source.none.fl_str_mv REM - International Engineering Journal v.72 n.2 2019
reponame:REM - International Engineering Journal
instname:Fundação Gorceix (FG)
instacron:FG
instname_str Fundação Gorceix (FG)
instacron_str FG
institution FG
reponame_str REM - International Engineering Journal
collection REM - International Engineering Journal
repository.name.fl_str_mv REM - International Engineering Journal - Fundação Gorceix (FG)
repository.mail.fl_str_mv ||editor@rem.com.br
_version_ 1754734691065266176

Registros relacionados