Evidences of the influence of the detonation sequence in rock fragmentation by blasting – Part I
| Autor: | Giorgio de Tomi, Jorge Silva Bettencourt, Marilena Cardu, Jacopo Seccatore, Fabio Galvão, Alberto Vaudagna, Alvaro Rezende |
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| Rok vydání: | 2015 |
| Předmět: |
Engineering
Explosive material Detonation KPIs EMPREENDIMENTOS MINEIROS (CUSTOS) Civil engineering Mining engineering Geochemistry and Petrology Component (UML) General Materials Science Drilling and blasting Drill & blast bench blasting Waste Management and Disposal business.industry Fragmentation (computing) rock fragmentation Drilling Geology downstream processing Economic Geology Performance indicator business Research center |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP Rem: Revista Escola de Minas v.68 n.3 2015 REM. Revista Escola de Minas Escola de Minas instacron:ESCOLA DE MINAS Rem: Revista Escola de Minas, Volume: 68, Issue: 3, Pages: 337-342, Published: SEP 2015 |
| ISSN: | 0370-4467 |
| DOI: | 10.1590/0370-44672014680218 |
| Popis: | Drilling and blasting are fundamental operations in the mining cycle and consti tute an important component of the mining costs. Rock fragmentation can in principle be managed by means of two options: by increasing or reducing the specific consumption of explosives, or by modifying the drilling pattern. The choice of one or other type of control depends on the relationship between the unit costs of drilling and explosives, and on technical restrictions or regulations imposed by different reasons. It is then necessary to identify the link between the blast design and some factors affecting the downstream processing of the product. This paper analyzes the theoretical basis aimed at evaluating the main parameters involved when organizing a production blast in open pit quarries. In particular, a method developed through the analysis of the results in a large number of limestone open pit quarries in Italy is described and commented. The first experimental results in Brazil have been obtained by applying this method at the Experimental Mine of the Research Center of Responsible Mining of the University of São Paulo. Experimental methods and results will be analyzed and discussed in the second part of this paper. |
| Databáze: | OpenAIRE |
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