Diagnosis of the production cycle in the small shaft sinking
| Autor(a) principal: | |
|---|---|
| Data de Publicação: | 2022 |
| Outros Autores: | , |
| Tipo de documento: | Artigo |
| Idioma: | eng |
| Título da fonte: | Research, Society and Development |
| DOI: | 10.33448/rsd-v11i5.28233 |
| Texto Completo: | https://rsdjournal.org/index.php/rsd/article/view/28233 |
Resumo: | Shaft sinking is a classic activity in underground mines. In shafts with small cross-section or in mines with low mechanization indices it is common to use hand pneumatic drills and blasting by explosive gelatin in cartridges, employing natural draft or flexible ducts with axial fans for gases and fumes exhaustion, muck removal by hand shoveling into hoistable dumping buckets. System of this type has been studied here, consisting of a rectangular cross-section shaft (3.7 m x 2.0 m), with final depth of 94 m, excavated in order to obtain samples for a pilot-scale mineral processing testwork, before the open pit mine’s industrial startup. The shaft had a concrete collar and its walls were supported by wooden sets spaced 1.5 m and 25 mm thick wooden planks as liners. This shaft has been excavated in schist rocks belonging to the metamorphosed hydrothermal deposit of copper and gold located in Chapada (municipality of Mara Rosa, Brazil). Daily production worksheets covering one month campaign were statistically analyzed, encompassing the entire cycle of mining operations, namely drilling, charging and blasting, fumes exhaustion, mucking, wall and face trimming and scaling, and assemblage of support system. Operation downtimes were also quantified. Statistical analysis of productivity indices allowed the detection of critical points of the operation and the establishment reference for similar mining operations. |
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Diagnosis of the production cycle in the small shaft sinkingDiagnóstico del ciclo productivo en la profundización de pequeños pozosDiagnose do ciclo produtivo no aprofundamento de pequenos poçosTrabalho mineiroMina subterrâneaPequenas minasDistribuição estatística.Labores minerosMinas subterráneasPequeñas minasDistribución estadística.Mine workUnderground mineSmall minesStatistical distribution.Shaft sinking is a classic activity in underground mines. In shafts with small cross-section or in mines with low mechanization indices it is common to use hand pneumatic drills and blasting by explosive gelatin in cartridges, employing natural draft or flexible ducts with axial fans for gases and fumes exhaustion, muck removal by hand shoveling into hoistable dumping buckets. System of this type has been studied here, consisting of a rectangular cross-section shaft (3.7 m x 2.0 m), with final depth of 94 m, excavated in order to obtain samples for a pilot-scale mineral processing testwork, before the open pit mine’s industrial startup. The shaft had a concrete collar and its walls were supported by wooden sets spaced 1.5 m and 25 mm thick wooden planks as liners. This shaft has been excavated in schist rocks belonging to the metamorphosed hydrothermal deposit of copper and gold located in Chapada (municipality of Mara Rosa, Brazil). Daily production worksheets covering one month campaign were statistically analyzed, encompassing the entire cycle of mining operations, namely drilling, charging and blasting, fumes exhaustion, mucking, wall and face trimming and scaling, and assemblage of support system. Operation downtimes were also quantified. Statistical analysis of productivity indices allowed the detection of critical points of the operation and the establishment reference for similar mining operations.El hundimiento de pozos es una actividad clásica en las minas subterráneas. En pozos de pequeña sección o en minas con bajos índices de mecanización es común el uso de perforadoras neumáticas manuales y voladuras por gelatina explosiva en cartuchos, empleando tiro natural o ductos flexibles con ventiladores axiales para extracción de gases y humos, remoción de material fragmentado con pala manual y baldes basculantes elevables. Aquí se ha estudiado un sistema de este tipo, consistente en un pozo de sección rectangular (3,7 m x 2,0 m), con profundidad final de 94 m, excavado con el fin de obtener muestras para ensayos de procesamiento de mineral a escala piloto, antes de la explotación a rajo abierto de la mina. El pozo tenía collar de hormigón y sus paredes estaban soportadas por juegos de madera espaciados 1,5 m y tablones de madera de 25 mm de espesor como revestimientos. Este pozo ha sido excavado en rocas esquistosas pertenecientes al yacimiento hidrotermal metamorfoseado de cobre y oro ubicado en Chapada (municipio de Mara Rosa, Brasil). Se analizaron estadísticamente las hojas de trabajo de producción diaria que cubrían una campaña de un mes, abarcando todo el ciclo de las operaciones mineras, a saber, perforación, carga y voladura, agotamiento de humos, remoción de escombros, recorte y escalado de paredes, y ensamblaje del sistema de soporte. También se cuantificaron los tiempos muertos de operación. El análisis estadístico de los índices de productividad permitió la detección de puntos críticos de la operación y el establecimiento de referencia para operaciones mineras similares.O aprofundamento de poços é uma atividade clássica em minas subterrâneas. Em poços de pequena seção transversal ou em minas com baixos índices de mecanização é comum o uso de perfuratrizes pneumáticas manuais e desmonte por gelatina explosiva em cartuchos, empregando tiragem natural ou dutos flexíveis com ventiladores axiais para exaustão de gases e fumos, remoção de material desmontado por paleamento manual e transporte em caçambas basculantes içáveis. Um sistema deste tipo foi estudado, constituído por um poço de secção retangular (3,7 m x 2,0 m), com profundidade final de 94 m, escavado para se obterem amostras para ensaios de beneficiamento mineral em escala piloto, antes posta em marcha industrial da cava a céu aberto. O poço era munido de colar de concreto e suas paredes eram sustentadas por quadros de madeira espaçados de 1,5 m e pranchões de madeira de 25 mm de espessura como revestimento. Este poço foi escavado em rochas xistosas pertencentes ao depósito hidrotermal metamorfoseado de cobre e ouro localizado na Chapada (município de Mara Rosa, Brasil). Foram analisadas estatisticamente as planilhas de produção diária de um mês de campanha, abrangendo todo o ciclo das operações, nomeadamente: perfuração, carregamento e desmonte, exaustão de fumos, remoção do material desmontado, aparelhamento de paredes e faces e montagem de sistema de escoramento. As paradas de operação também foram quantificadas. A análise estatística dos índices de produtividade permitiu a detecção de pontos críticos da operação e o estabelecimento de referência para operações mineiras similares.Research, Society and Development2022-04-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://rsdjournal.org/index.php/rsd/article/view/2823310.33448/rsd-v11i5.28233Research, Society and Development; Vol. 11 No. 5; e44711528233Research, Society and Development; Vol. 11 Núm. 5; e44711528233Research, Society and Development; v. 11 n. 5; e447115282332525-3409reponame:Research, Society and Developmentinstname:Universidade Federal de Itajubá (UNIFEI)instacron:UNIFEIenghttps://rsdjournal.org/index.php/rsd/article/view/28233/24733Copyright (c) 2022 José Aurélio Medeiros da Luz; José Margarida da Silva; Pedro Henrique Neuppmannhttps://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccess Luz, José Aurélio Medeiros daSilva, José Margarida daNeuppmann, Pedro Henrique 2022-04-17T18:18:56Zoai:ojs.pkp.sfu.ca:article/28233Revistahttps://rsdjournal.org/index.php/rsd/indexPUBhttps://rsdjournal.org/index.php/rsd/oairsd.articles@gmail.com2525-34092525-3409opendoar:2024-01-17T09:45:42.687239Research, Society and Development - Universidade Federal de Itajubá (UNIFEI)false |
| dc.title.none.fl_str_mv |
Diagnosis of the production cycle in the small shaft sinking Diagnóstico del ciclo productivo en la profundización de pequeños pozos Diagnose do ciclo produtivo no aprofundamento de pequenos poços |
| title |
Diagnosis of the production cycle in the small shaft sinking |
| spellingShingle |
Diagnosis of the production cycle in the small shaft sinking Diagnosis of the production cycle in the small shaft sinking Luz, José Aurélio Medeiros da Trabalho mineiro Mina subterrânea Pequenas minas Distribuição estatística. Labores mineros Minas subterráneas Pequeñas minas Distribución estadística. Mine work Underground mine Small mines Statistical distribution. Luz, José Aurélio Medeiros da Trabalho mineiro Mina subterrânea Pequenas minas Distribuição estatística. Labores mineros Minas subterráneas Pequeñas minas Distribución estadística. Mine work Underground mine Small mines Statistical distribution. |
| title_short |
Diagnosis of the production cycle in the small shaft sinking |
| title_full |
Diagnosis of the production cycle in the small shaft sinking |
| title_fullStr |
Diagnosis of the production cycle in the small shaft sinking Diagnosis of the production cycle in the small shaft sinking |
| title_full_unstemmed |
Diagnosis of the production cycle in the small shaft sinking Diagnosis of the production cycle in the small shaft sinking |
| title_sort |
Diagnosis of the production cycle in the small shaft sinking |
| author |
Luz, José Aurélio Medeiros da |
| author_facet |
Luz, José Aurélio Medeiros da Luz, José Aurélio Medeiros da Silva, José Margarida da Neuppmann, Pedro Henrique Silva, José Margarida da Neuppmann, Pedro Henrique |
| author_role |
author |
| author2 |
Silva, José Margarida da Neuppmann, Pedro Henrique |
| author2_role |
author author |
| dc.contributor.author.fl_str_mv |
Luz, José Aurélio Medeiros da Silva, José Margarida da Neuppmann, Pedro Henrique |
| dc.subject.por.fl_str_mv |
Trabalho mineiro Mina subterrânea Pequenas minas Distribuição estatística. Labores mineros Minas subterráneas Pequeñas minas Distribución estadística. Mine work Underground mine Small mines Statistical distribution. |
| topic |
Trabalho mineiro Mina subterrânea Pequenas minas Distribuição estatística. Labores mineros Minas subterráneas Pequeñas minas Distribución estadística. Mine work Underground mine Small mines Statistical distribution. |
| description |
Shaft sinking is a classic activity in underground mines. In shafts with small cross-section or in mines with low mechanization indices it is common to use hand pneumatic drills and blasting by explosive gelatin in cartridges, employing natural draft or flexible ducts with axial fans for gases and fumes exhaustion, muck removal by hand shoveling into hoistable dumping buckets. System of this type has been studied here, consisting of a rectangular cross-section shaft (3.7 m x 2.0 m), with final depth of 94 m, excavated in order to obtain samples for a pilot-scale mineral processing testwork, before the open pit mine’s industrial startup. The shaft had a concrete collar and its walls were supported by wooden sets spaced 1.5 m and 25 mm thick wooden planks as liners. This shaft has been excavated in schist rocks belonging to the metamorphosed hydrothermal deposit of copper and gold located in Chapada (municipality of Mara Rosa, Brazil). Daily production worksheets covering one month campaign were statistically analyzed, encompassing the entire cycle of mining operations, namely drilling, charging and blasting, fumes exhaustion, mucking, wall and face trimming and scaling, and assemblage of support system. Operation downtimes were also quantified. Statistical analysis of productivity indices allowed the detection of critical points of the operation and the establishment reference for similar mining operations. |
| publishDate |
2022 |
| dc.date.none.fl_str_mv |
2022-04-12 |
| dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
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article |
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publishedVersion |
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https://rsdjournal.org/index.php/rsd/article/view/28233 10.33448/rsd-v11i5.28233 |
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https://rsdjournal.org/index.php/rsd/article/view/28233 |
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10.33448/rsd-v11i5.28233 |
| dc.language.iso.fl_str_mv |
eng |
| language |
eng |
| dc.relation.none.fl_str_mv |
https://rsdjournal.org/index.php/rsd/article/view/28233/24733 |
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https://creativecommons.org/licenses/by/4.0 info:eu-repo/semantics/openAccess |
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https://creativecommons.org/licenses/by/4.0 |
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openAccess |
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application/pdf |
| dc.publisher.none.fl_str_mv |
Research, Society and Development |
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Research, Society and Development |
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Research, Society and Development; Vol. 11 No. 5; e44711528233 Research, Society and Development; Vol. 11 Núm. 5; e44711528233 Research, Society and Development; v. 11 n. 5; e44711528233 2525-3409 reponame:Research, Society and Development instname:Universidade Federal de Itajubá (UNIFEI) instacron:UNIFEI |
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Universidade Federal de Itajubá (UNIFEI) |
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UNIFEI |
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UNIFEI |
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Research, Society and Development |
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Research, Society and Development |
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Research, Society and Development - Universidade Federal de Itajubá (UNIFEI) |
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rsd.articles@gmail.com |
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1822178596723097600 |
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10.33448/rsd-v11i5.28233 |