Assessment of the effects of vegetational cover on the long-term stabilityof a waste rock dump.

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dc.contributor.authorLima, Hernani Mota de
dc.contributor.authorMendanha, Fabiano Oliveira
dc.date.accessioned2020-06-04T18:36:17Z
dc.date.available2020-06-04T18:36:17Z
dc.date.issued2019
dc.description.abstractWaste rock dump reclamation includes re-grading the banks to flatten the overall slope followed by re-vegetation. These measures are required to reduce surface erosion, provide physical stability, and meet future use goals. In some cases, the presence of trees can cause localized shear zones in a waste rock dump by the load of the tree mass and the action of wind, the presence of roots in the soil and the death of some species. In geotechnical assessment, however, the influence of trees on slope stability of waste rock dumps is only qualitative. This article assesses the effects of trees on slope stability of a reclaimed waste rock dump of an iron ore mine. Historic data of construction, laboratory tests, and stability analysis were evaluated. Slope stability assessments were performed after an extensive geotechnical and forest campaign, considering two scenarios - the final waste rock dump without the vegetational cover and the final waste rock with vegetational cover. Tree vegetation in slopes produces both positive and negative effects on slope stability. For scenario 1, the lowest factor of safety occurs for a potential failure surface near the bottom of the waste dump, passing by a layer 6 m depth from the surface. In scenario 2 the factor of safety is increased by 10%. For deeper failure surface, the smallest factor of safety occurs 30 m deep. However, very tall trees at the top of the waste dump are subject to wind action, which has a negative impact on slope stability.pt_BR
dc.identifier.citationLIMA, H. M. de; MENDANHA, F. O. Assessment of the effects of vegetational cover on the long-term stabilityof a waste rock dump. REM - International Engineering Journal, Ouro Preto, v. 72, n. 4, p. 667-674, out./dez. 2019. Disponível em: <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2448-167X2019000500667>. Acesso em: 10 mar. 2020.pt_BR
dc.identifier.doihttps://doi.org/10.1590/0370-44672018720176 pt_BR
dc.identifier.issn1807-0353
dc.identifier.urihttp://www.repositorio.ufop.br/handle/123456789/12311
dc.language.isoen_USpt_BR
dc.rightsabertopt_BR
dc.rights.licenseA REM - International Engineering Journal - autoriza o depósito de cópia de artigos dos professores e alunos da UFOP no Repositório Institucional da UFOP. Licença concedida mediante preenchimento de formulário online em 12 set. 2013.pt_BR
dc.subjectSlope stabilitypt_BR
dc.subjectTreespt_BR
dc.subjectWind forcept_BR
dc.subjectMine closurept_BR
dc.titleAssessment of the effects of vegetational cover on the long-term stabilityof a waste rock dump.pt_BR
dc.typeArtigo publicado em periodicopt_BR
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