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Article

Numerical Modelling of Blasting Fragmentation Optimization in a Copper Mine

1
Instituto Tecnológico Vale, Ouro Preto 35400-000, MG, Brazil
2
Itasca Chile, Santiago de Chile 7500524, Chile
3
Vale S.A., Nova Lima 34000-000, MG, Brazil
4
Department of Mining Engineering, Campus Morro do Cruzeiro, Universidade Federal de Ouro Preto, Ouro Preto 35400-000, MG, Brazil
*
Author to whom correspondence should be addressed.
Academic Editors: Mohammad H.B. (Farzine) Nasseri, Bibhu Mohanty and Kamran Esmaeili
Mining 2022, 2(4), 654-669; https://doi.org/10.3390/mining2040035
Received: 12 July 2022 / Revised: 6 September 2022 / Accepted: 14 September 2022 / Published: 22 September 2022
The blasting operation considerably influences the overall productivity of opencast mines, especially when blasting results in oversized fragments that impact the operations ranging from excavation to milling. In this work, a numerical analysis of blasting performance was implemented to optimize the blasting parameters and improve the fragmentation of the hard rock in a copper open pit mine site in Brazil. In this paper, the methodology comprised data collection, 3D numerical model construction for blasting optimization using Blo-Up software, calibration with historical data, and predictive analysis, including testing two different blast designs. With the objective of achieving a desired P80 size of the blasting fragmentation, the results indicate an optimized calibrated model with an overall error equal to 4.0% using a Swebrec distribution fitted to the model data. The optimal P80 size of the resulting muckpile was equivalent to ~0.53 m for the hard rock copper fragments, which was close to the desired P80 size. View Full-Text
Keywords: blasting optimization; numerical modelling; fragmentation; hard rock mine; optimal size blasting optimization; numerical modelling; fragmentation; hard rock mine; optimal size
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MDPI and ACS Style

Torres, V.F.N.; Castro, C.; Valencia, M.E.; Figueiredo, J.R.; Silveira, L.G.C. Numerical Modelling of Blasting Fragmentation Optimization in a Copper Mine. Mining 2022, 2, 654-669. https://doi.org/10.3390/mining2040035

AMA Style

Torres VFN, Castro C, Valencia ME, Figueiredo JR, Silveira LGC. Numerical Modelling of Blasting Fragmentation Optimization in a Copper Mine. Mining. 2022; 2(4):654-669. https://doi.org/10.3390/mining2040035

Chicago/Turabian Style

Torres, Vidal Félix Navarro, Cristian Castro, María Elena Valencia, Janine Rodrigues Figueiredo, and Leandro Geraldo Canaan Silveira. 2022. "Numerical Modelling of Blasting Fragmentation Optimization in a Copper Mine" Mining 2, no. 4: 654-669. https://doi.org/10.3390/mining2040035

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