{"id":29372,"date":"2025-11-18T09:55:21","date_gmt":"2025-11-18T12:55:21","guid":{"rendered":"https:\/\/www.inthemine.com.br\/site\/?p=29372"},"modified":"2025-11-18T10:08:53","modified_gmt":"2025-11-18T13:08:53","slug":"serra-azul-e-descaracterizada-com-operacao-remota","status":"publish","type":"post","link":"https:\/\/www.inthemine.com.br\/site\/serra-azul-e-descaracterizada-com-operacao-remota\/","title":{"rendered":"SERRA AZUL \u00c9 DESCARACTERIZADA COM OPERA\u00c7\u00c3O REMOTA"},"content":{"rendered":"<p>Em agosto de 2025, a ArcelorMittal obteve a licen\u00e7a ambiental para iniciar a descaracteriza\u00e7\u00e3o da barragem da Mina de Serra Azul, localizada em Itatiaiu\u00e7u (MG). A autoriza\u00e7\u00e3o foi poss\u00edvel ap\u00f3s a conclus\u00e3o da implanta\u00e7\u00e3o da Estrutura de Conten\u00e7\u00e3o a Jusante (ECJ), dedicada \u00e0 reten\u00e7\u00e3o de todo o rejeito da barragem na hip\u00f3tese de um rompimento, nos termos dos requisitos exigidos pela legisla\u00e7\u00e3o ambiental. A ECJ foi constru\u00edda por uma t\u00e9cnica de crava\u00e7\u00e3o de 975 tubos de a\u00e7o no solo, com a forma\u00e7\u00e3o de tr\u00eas linhas paralelas de conten\u00e7\u00e3o, espa\u00e7os preenchidos por rochas e sistema de drenagem. A estrutura conta com 400 m de comprimento, de ombreira a ombreira, e 200 m de largura.<\/p>\n<p>Segundo S\u00e9rgio Botelho, diretor executivo da ArcelorMittal Minera\u00e7\u00e3o Serra Azul, as atividades de descaracteriza\u00e7\u00e3o j\u00e1 foram iniciadas e mais de 30 mil m\u00b3 de rejeitos j\u00e1 foram removidos do reservat\u00f3rio. Cumprido o cronograma proposto, os trabalhos, que mobilizar\u00e3o mais de 300 profissionais em seu momento de pico, devem ser finalizados no segundo semestre de 2032.<\/p>\n<figure id=\"attachment_29374\" aria-describedby=\"caption-attachment-29374\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.inthemine.com.br\/site\/wp-content\/uploads\/2025\/11\/Foto2.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-29374\" src=\"https:\/\/www.inthemine.com.br\/site\/wp-content\/uploads\/2025\/11\/Foto2.jpg\" alt=\"\u00a0S\u00e9rgio Botelho, diretor de Geotecnia da Minera\u00e7\u00e3o Serra Azul\" width=\"700\" height=\"665\" srcset=\"https:\/\/www.inthemine.com.br\/site\/wp-content\/uploads\/2025\/11\/Foto2.jpg 700w, https:\/\/www.inthemine.com.br\/site\/wp-content\/uploads\/2025\/11\/Foto2-300x285.jpg 300w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><figcaption id=\"caption-attachment-29374\" class=\"wp-caption-text\">S\u00e9rgio Botelho, diretor de Geotecnia da Minera\u00e7\u00e3o Serra Azul<\/figcaption><\/figure>\n<p>S\u00e3o previstas sete etapas de remo\u00e7\u00e3o dos rejeitos at\u00e9 a conclus\u00e3o da descaracteriza\u00e7\u00e3o, cada uma delas correspondente \u00e0 remo\u00e7\u00e3o de uma camada completa da superf\u00edcie da barragem. \u201cNesse processo, a escava\u00e7\u00e3o ser\u00e1 executada de forma a manter um grau de declividade no reservat\u00f3rio da barragem que garanta a drenagem da \u00e1gua para os sumps de bombeamento instalados na regi\u00e3o a montante da estrutura\u201d, explica Botelho.<\/p>\n<h3><strong>Indicadores seguros<\/strong><\/h3>\n<p>A barragem Serra Azul foi enquadrada no n\u00edvel 3 de emerg\u00eancia \u2013 o de risco mais cr\u00edtico de colapso &#8211; pela ANM (Ag\u00eancia Nacional de Minera\u00e7\u00e3o) em 22 de fevereiro de 2022. Segundo comunicado da mineradora, \u00e0 \u00e9poca, a reclassifica\u00e7\u00e3o se deu ap\u00f3s a entrada em vigor da Resolu\u00e7\u00e3o n\u00ba 95\/2022 da ag\u00eancia, que alterou os crit\u00e9rios para determina\u00e7\u00e3o do n\u00edvel de emerg\u00eancia de barragens de minera\u00e7\u00e3o. A estrutura estava em n\u00edvel 1 de emerg\u00eancia at\u00e9 fevereiro de 2019, quando passou ao n\u00edvel 2 devido ao acionamento do Plano de A\u00e7\u00e3o de Emerg\u00eancia de Barragem de Minera\u00e7\u00e3o (PAEBM).<\/p>\n<p>Nessa ocasi\u00e3o, a empresa promoveu, preventivamente, a realoca\u00e7\u00e3o da comunidade que vivia na chamada Zona de Autossalvamento (ZAS) da barragem. Como ent\u00e3o, a t\u00edtulo de preven\u00e7\u00e3o, foram implementadas a\u00e7\u00f5es de seguran\u00e7a superiores \u00e0s exigidas pela legisla\u00e7\u00e3o vigente, a ArcelorMittal assegurou que a passagem para o n\u00edvel 3 n\u00e3o exigiria medidas ou a\u00e7\u00f5es de seguran\u00e7a adicionais.<\/p>\n<figure id=\"attachment_29375\" aria-describedby=\"caption-attachment-29375\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.inthemine.com.br\/site\/wp-content\/uploads\/2025\/11\/Foto3-3.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-29375\" src=\"https:\/\/www.inthemine.com.br\/site\/wp-content\/uploads\/2025\/11\/Foto3-3.jpg\" alt=\"Serra Azul, em Itatiaiu\u00e7u, ter\u00e1 descaracteriza\u00e7\u00e3o conclu\u00edda em 2032\" width=\"700\" height=\"394\" srcset=\"https:\/\/www.inthemine.com.br\/site\/wp-content\/uploads\/2025\/11\/Foto3-3.jpg 700w, https:\/\/www.inthemine.com.br\/site\/wp-content\/uploads\/2025\/11\/Foto3-3-300x169.jpg 300w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><figcaption id=\"caption-attachment-29375\" class=\"wp-caption-text\">Serra Azul, em Itatiaiu\u00e7u, ter\u00e1 descaracteriza\u00e7\u00e3o conclu\u00edda em 2032<\/figcaption><\/figure>\n<p>Segundo Botelho, Serra Azul est\u00e1 desativada e n\u00e3o recebe rejeitos desde 2012, \u00e9 monitorada 24 horas por dia durante os sete dias da semana, atrav\u00e9s do Centro de Monitoramento Geot\u00e9cnico implantado na mina, e os indicadores de seguran\u00e7a, mensurados por instrumentos espec\u00edficos, permanecem inalterados desde o acionamento do PAEBM em 2019.<\/p>\n<p>A restri\u00e7\u00e3o de acesso de pessoas \u00e0 barragem fez com que a mineradora buscasse alternativas para a descaracteriza\u00e7\u00e3o da estrutura. Nos anos iniciais das obras ser\u00e3o empregados equipamentos n\u00e3o tripulados, operados a uma dist\u00e2ncia de 2 km da frente de trabalho. A ado\u00e7\u00e3o dessa tecnologia, uma medida adicional de prote\u00e7\u00e3o, como define o diretor, exigiu uma infraestrutura robusta para a telecomunica\u00e7\u00e3o dos equipamentos, al\u00e9m de um rigoroso processo de capacita\u00e7\u00e3o dos operadores.<\/p>\n<p>Durante a execu\u00e7\u00e3o do projeto, ser\u00e1 mantido o monitoramento cont\u00ednuo da estrutura com uso de radares, sensores GNSS (de Navega\u00e7\u00e3o por Sat\u00e9lite), c\u00e2meras, piez\u00f4metros, indicadores de n\u00edvel d\u2019\u00e1gua, sism\u00f3grafos, prismas, ETR (Esta\u00e7\u00f5es Transmissoras de Radiocomunica\u00e7\u00e3o) e medidores de vaz\u00e3o, al\u00e9m de drones para inspe\u00e7\u00e3o visual de campo.<\/p>\n<p><strong>Barragem da ArcelorMittal Inscrita na PNSB<\/strong><\/p>\n<p><strong>\u00a0<\/strong><\/p>\n<table width=\"606\">\n<tbody>\n<tr>\n<td width=\"75\"><strong>Nome<\/strong><\/td>\n<td width=\"72\"><strong>Munic\u00edpio\/<\/strong><\/p>\n<p><strong>UF<\/strong><\/td>\n<td width=\"73\"><strong>M\u00e9todo<\/strong><\/p>\n<p><strong>Construtivo<\/strong><\/td>\n<td width=\"47\"><strong>Risco<\/strong><\/td>\n<td width=\"35\"><strong>DPA<\/strong><\/td>\n<td width=\"78\"><strong>N\u00edvel de Emerg\u00eancia<\/strong><\/td>\n<td width=\"128\"><strong>Situa\u00e7\u00e3o <\/strong><\/p>\n<p><strong>Operacional<\/strong><\/td>\n<td width=\"96\"><strong>Embargo<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"75\">Serra Azul<\/td>\n<td width=\"72\">Itatiaiu\u00e7u\/ MG<\/td>\n<td width=\"73\">Linha de Centro<\/td>\n<td width=\"47\">Alto<\/td>\n<td width=\"35\">Alto<\/td>\n<td width=\"78\">3<\/td>\n<td width=\"128\">OD<\/td>\n<td width=\"96\">Embargada<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4>OD: Em obras de descaracteriza\u00e7\u00e3o-\u00a0 Fonte: SIGBM\/ANM<\/h4>\n<h5>Foto em destaque: Implanta\u00e7\u00e3o da ECJ, que teve 975 tubos de a\u00e7o cravados no solo<\/h5>\n<h5>Fotos:ArcelorMittal\/Divulga\u00e7\u00e3o<\/h5>\n","protected":false},"excerpt":{"rendered":"<p>Em n\u00edvel 3 de emerg\u00eancia desde 2022, por medida de precau\u00e7\u00e3o e restri\u00e7\u00e3o de acesso a pessoas, equipamentos da obra ser\u00e3o n\u00e3o tripulados<\/p>\n","protected":false},"author":3,"featured_media":29373,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[],"class_list":["post-29372","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-meio-ambiente"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>SERRA AZUL \u00c9 DESCARACTERIZADA COM OPERA\u00c7\u00c3O REMOTA - Revista In The Mine<\/title>\n<meta name=\"description\" content=\"Em n\u00edvel 3 de emerg\u00eancia desde 2022, por medida de precau\u00e7\u00e3o e 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