DENSITY MONITORING OF BULK EMULSION EXPLOSIVES IN CONFINED BLASTHOLES

Felipe França Sitonio; Jair Carlos Koppe

doi:10.15628/holos.2024.14671

Autores/as

Felipe França Sitonio Universidade Federal do Rio Grande do Sul https://orcid.org/0000-0002-0992-6200
Jair Carlos Koppe Universidade Federal do Rio Grande do Sul https://orcid.org/0000-0002-3662-016X

DOI:

https://doi.org/10.15628/holos.2024.14671

Palabras clave:

rock blasting, detonation, mining

Resumen

Parameter’s control of explosives used in open pit mining operations have become more relevant over the years, bringing a better understanding of detonation performance. Giving into consideration that bulk emulsion density reflects on blasting results due to its importance in product sensitivity and velocity of detonation (VOD), blast designs are conducted assuming that cup density measurements are reliable and explosives gassing agents will perform as per specifications. Nevertheless, confinement conditions in boreholes are often neglected on predictive modelling. This paper describes the assembly of a device equipped with pressure sensors and its utilization in confined boreholes, obtaining in situ monitoring of density variation in explosive columns. The results enabled a comparison between bulk emulsion density variation when acting in different environments, providing detailed insights into how chemically sensitized explosives behave into different circumstances, giving the opportunity to re-evaluate blast design.

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Biografía del autor/a

Felipe França Sitonio, Universidade Federal do Rio Grande do Sul

Felipe Sitonio is a Brazilian Mining Engineer, working since 2014 in the explosive industry and open pit operations. Holds a bachelor's and a master’s degree in Mining Engineering from the Universidade Federal de Pernambuco (UFPE). Is currently enrolled in the doctoral program at Universidade Federal do Rio Grande do Sul (UFRGS) as a PhD candidate, researching blasting techniques with emphasis in properties of bulk emulsion explosives.

Felipe started his professional experience working with copper flotation in 2010, but the interest in mine planning and operation lead him to another path. From 2014 to 2021, managed the company Plug Plus, developing and supplying stemming plugs for quarry mining companies around Northeast Brazil.

Works for Vale as Drill and Blast Engineer at Carajás Mine, managing the emulsion plant, blasting schedules and technical premises.

Jair Carlos Koppe, Universidade Federal do Rio Grande do Sul

Professor Jair Carlos Koppe, Mining Engineer and Geologist, MSc. and Dr. in Sc., is engaged in the Post-Graduation Program of Mining, Metallurgical and Materials Engineering at Federal University of Rio Grande do Sul (UFRGS), Brazil. He has worked in research, teaching and consulting since 1980. His work experience includes the position of mining engineer and geologist in mineral exploration of gold, and mining of gold and dimension stones. His research interests include rock mechanics, unit operations of mining, mine planning, mineral exploration and mine reclamation and waste management. Professor Koppe leads the blasting engineering and the rock mechanics emphasis areas in the Mining Engineering Department at UFRGS. He his been publishing regularly technical papers in international journals and international conferences. He has authored and co-authored over 250 publications.

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