On the design of the fiber reinforced shotcrete applied as primary rock support in the Cuiabá underground mining excavations: A case study

The Cuiabá mine is an underground gold operation located in Sabará (Minas Gerais, Brazil), which began to use fiber reinforced shotcrete as rock support since 2012. In order to carry on a mechanical analysis and to design the steel and polypropylene fiber reinforced shotcrete linings, the work in ha...

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Autores principales:	Vitor Moreira de Alencar Monteiro, Flávio de Andrade Silva
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Fiber reinforced shotcrete Rock support Round and square panel tests Design Materials of engineering and construction. Mechanics of materials TA401-492
Acceso en línea:	https://doaj.org/article/04fd9efc2ab549daa7946bf6ebf199fa
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spelling	oai:doaj.org-article:04fd9efc2ab549daa7946bf6ebf199fa2021-11-18T04:49:01ZOn the design of the fiber reinforced shotcrete applied as primary rock support in the Cuiabá underground mining excavations: A case study2214-509510.1016/j.cscm.2021.e00784https://doaj.org/article/04fd9efc2ab549daa7946bf6ebf199fa2021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2214509521002990https://doaj.org/toc/2214-5095The Cuiabá mine is an underground gold operation located in Sabará (Minas Gerais, Brazil), which began to use fiber reinforced shotcrete as rock support since 2012. In order to carry on a mechanical analysis and to design the steel and polypropylene fiber reinforced shotcrete linings, the work in hand presents an experimental investigation on the mechanical behavior of the applied composite material inside the Cuiabá mine. Through standardized panel tests, the paper evaluates the toughness performance levels for each studied fiber reinforced shotcrete and applies the current design guidelines for mining works. Based on the rock mass classification of the analyzed mine slopes, while the use of 4.2 kg/m3 of polypropylene fiber volume fractions seems to be suitable where fair rock quality is observed, the addition of 25 kg/m3 of steel fibers is more indicated where severe ground movement is expected. On the other hand, a mismatch between the standardized panel tests (ASTM C1550 and EN 14488-5) on the shotcrete design guidelines was also assessed in the present research. The analyzed fiber reinforced shotcrete received different classifications depending on the used standardized panel test, resulting on an overestimation of the PP fiber reinforced shotcrete for the square panel tests. Safety factors can be applied in order to mitigate the possible mismatch between square and round panel tests.Vitor Moreira de Alencar MonteiroFlávio de Andrade SilvaElsevierarticleFiber reinforced shotcreteRock supportRound and square panel testsDesignMaterials of engineering and construction. Mechanics of materialsTA401-492ENCase Studies in Construction Materials, Vol 15, Iss , Pp e00784- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Fiber reinforced shotcrete Rock support Round and square panel tests Design Materials of engineering and construction. Mechanics of materials TA401-492
spellingShingle	Fiber reinforced shotcrete Rock support Round and square panel tests Design Materials of engineering and construction. Mechanics of materials TA401-492 Vitor Moreira de Alencar Monteiro Flávio de Andrade Silva On the design of the fiber reinforced shotcrete applied as primary rock support in the Cuiabá underground mining excavations: A case study
description	The Cuiabá mine is an underground gold operation located in Sabará (Minas Gerais, Brazil), which began to use fiber reinforced shotcrete as rock support since 2012. In order to carry on a mechanical analysis and to design the steel and polypropylene fiber reinforced shotcrete linings, the work in hand presents an experimental investigation on the mechanical behavior of the applied composite material inside the Cuiabá mine. Through standardized panel tests, the paper evaluates the toughness performance levels for each studied fiber reinforced shotcrete and applies the current design guidelines for mining works. Based on the rock mass classification of the analyzed mine slopes, while the use of 4.2 kg/m3 of polypropylene fiber volume fractions seems to be suitable where fair rock quality is observed, the addition of 25 kg/m3 of steel fibers is more indicated where severe ground movement is expected. On the other hand, a mismatch between the standardized panel tests (ASTM C1550 and EN 14488-5) on the shotcrete design guidelines was also assessed in the present research. The analyzed fiber reinforced shotcrete received different classifications depending on the used standardized panel test, resulting on an overestimation of the PP fiber reinforced shotcrete for the square panel tests. Safety factors can be applied in order to mitigate the possible mismatch between square and round panel tests.
format	article
author	Vitor Moreira de Alencar Monteiro Flávio de Andrade Silva
author_facet	Vitor Moreira de Alencar Monteiro Flávio de Andrade Silva
author_sort	Vitor Moreira de Alencar Monteiro
title	On the design of the fiber reinforced shotcrete applied as primary rock support in the Cuiabá underground mining excavations: A case study
title_short	On the design of the fiber reinforced shotcrete applied as primary rock support in the Cuiabá underground mining excavations: A case study
title_full	On the design of the fiber reinforced shotcrete applied as primary rock support in the Cuiabá underground mining excavations: A case study
title_fullStr	On the design of the fiber reinforced shotcrete applied as primary rock support in the Cuiabá underground mining excavations: A case study
title_full_unstemmed	On the design of the fiber reinforced shotcrete applied as primary rock support in the Cuiabá underground mining excavations: A case study
title_sort	on the design of the fiber reinforced shotcrete applied as primary rock support in the cuiabá underground mining excavations: a case study
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/04fd9efc2ab549daa7946bf6ebf199fa
work_keys_str_mv	AT vitormoreiradealencarmonteiro onthedesignofthefiberreinforcedshotcreteappliedasprimaryrocksupportinthecuiabaundergroundminingexcavationsacasestudy AT flaviodeandradesilva onthedesignofthefiberreinforcedshotcreteappliedasprimaryrocksupportinthecuiabaundergroundminingexcavationsacasestudy
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On the design of the fiber reinforced shotcrete applied as primary rock support in the Cuiabá underground mining excavations: A case study

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