@MastersThesis{Pinto:2015:DeDeSu,
author = "Pinto, Carolina de Athayde",
title = "Detec{\c{c}}{\~a}o de deforma{\c{c}}{\~o}es superficiais na
Mina do Mangan{\^e}s do Azul atrav{\'e}s da interferometria de
radar orbital",
school = "Instituto Nacional de Pesquisas Espaciais (INPE)",
year = "2015",
address = "S{\~a}o Jos{\'e} dos Campos",
month = "2015-08-25",
keywords = "TerraSAR-X, interferometria SAR diferencial, Mina de Mangan{\^e}s
do Azul, prov{\'{\i}}ncia mineral de Caraj{\'a}s, regi{\~a}o
Amaz{\^o}nica, differential SAR interferometry, open pit
manganese mine, Caraj{\'a}s province, Amazon region.",
abstract = "A Mina do Azul, inserida na Prov{\'{\i}}ncia Mineral de
Caraj{\'a}s, regi{\~a}o Amaz{\^o}nica, {\'e} a mina de
mangan{\^e}s a c{\'e}u aberto mais importante do Brasil. A Vale
S.A. opera na {\'a}rea com tr{\^e}s cavas simultaneamente (minas
1, 2 e 3), que s{\~a}o associadas a produtos de rochas de
altera{\c{c}}{\~a}o de baixa qualidade geomec{\^a}nica com
arenitos, siltitos e coberturas later{\'{\i}}ticas da
Forma{\c{c}}{\~a}o {\'A}guas Claras. Com o intuito de monitorar
poss{\'{\i}}veis deforma{\c{c}}{\~o}es no terreno, foram
utilizadas na investiga{\c{c}}{\~a}o 33 imagens TerraSAR-X
(TSX-1), no formato StripMap, que abrangem o per{\'{\i}}odo de
20 mar{\c{c}}o de 2012 a 4 abril de 2013. As cenas foram
processadas utilizando duas abordagens interferom{\'e}tricas:
DInSAR Convencional (Interferometria SAR Diferencial) e DInSAR
Avan{\c{c}}ada. As abordagens DInSAR Avan{\c{c}}ada empregadas
s{\~a}o baseadas na Interferometria por Espalhadores Persistentes
(PSI) e DInSAR Times Series. Os resultados mostraram que a maior
parte das minas pode ser considerada est{\'a}vel no
per{\'{\i}}odo de cobertura de aquisi{\c{c}}{\~a}o das imagens
SAR. No entanto, as maiores taxas de deforma{\c{c}}{\~o}es foram
detectadas nas pilhas de est{\'e}ril, provavelmente relacionadas
a mecanismos de recalque, e tamb{\'e}m ao longo dos taludes do
flanco norte da Mina 1, indicando movimentos em
dire{\c{c}}{\~a}o ao centro da mina. Nesse setor da mina, a
rela{\c{c}}{\~a}o espacial das estruturas geol{\'o}gicas com os
PS mostrou que as maiores taxas de deforma{\c{c}}{\~a}o
est{\~a}o concentradas ao longo do corredor de
deforma{\c{c}}{\~a}o composto por falhas, fraturas e dobras,
relacionado ao Sistema de Falhas Caraj{\'a}s. Medidas de radar de
campo de um curto per{\'{\i}}odo de cobertura do TSX-1, para as
paredes das bancadas do flanco sul da Mina 1, mostraram que o
padr{\~a}o de deforma{\c{c}}{\~a}o dos PS {\'e} concordante
com as medidas geot{\'e}cnicas de campo. Assim, a
investiga{\c{c}}{\~a}o enfatizou a import{\^a}ncia que a DInSAR
orbital pode ter no monitoramento da deforma{\c{c}}{\~a}o e na
avalia{\c{c}}{\~a}o dos riscos nesse tipo de
minera{\c{c}}{\~a}o. ABSTRACT: The Azul mining complex, located
in the Caraj{\'a}s Mineral Province, Amazon region, encompasses
the most important manganese mine in Brazil. Vale S.A. company
operates in the area three simultaneous excavations (mines 1, 2
and 3), which are conducted on rock alteration products of low
geomechanical quality related to sandstones, siltstones and a
lateritic cover. In order to monitor ground deformation, 33
TerraSAR-X (TSX-1) StripMap images covering the period of March
2012- April 2013 were used in the investigation. The scenes were
processed based on two interferometric approaches: the
Conventional DInSAR (Differential Synthetic Aperture Radar
Interferometry) and the Advanced DInSAR (A-DInSAR). A-DInSAR
approaches based on Persistent Scatterer Interferometry (PSI)
analysis and DInSAR Times Series were used and these results
showed that most of the area was considered stable during the time
span of the SAR acquisitions. However, a high deformation rates
were mapped over a waste pile, probable related to settlements,
and also along the north flank of mine 1, indicative of cut slope
movements toward the center of the pit. A spatial relationship of
geological structures with Persistent Scatterers (PS) was observed
for this sector of the mine, given by PS showing deformation rates
concentrated along a structural corridor with faults, fractures
and folds related to the Caraj{\'a}s Fault system. Despite only
ground-based radar measurements were available for a short time
period of the TSX-1 coverage, for wall benches along the south
flank of mine 1, the PS movement patterns showed concordance with
geotechnical field measurements. The investigation emphasized the
important role that satellite-based DInSAR can play for
deformation monitoring and risk assessment in this kind of mining
area.",
committee = "Paradella, Waldir Renato (presidente/orientador) and Mura,
Jos{\'e} Claudio (orientador) and Gama, F{\'a}bio Furlan and
Silva, Arnaldo de Queiroz da",
copyholder = "SID/SCD",
englishtitle = "Detection of surface displacements in the Azul open pit manganese
mine by using synthetic aperture radar interferometry",
language = "pt",
pages = "193",
ibi = "8JMKD3MGP3W34P/3JUHDQH",
url = "http://urlib.net/ibi/8JMKD3MGP3W34P/3JUHDQH",
targetfile = "publicacao.pdf",
urlaccessdate = "27 abr. 2024"
}