Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
On loader productivity, rock strength and explosive energy in metal mining
Year:2011
Research Areas
  • Earth sciences,
  • Civil engineering
Information
Abstract
Twenty production blasts in two open pit mines were monitored, in rocks with medium to very high strength. Three different blasting agents (ANFO, watergel and emulsion blend) were used, with powder factors ranging between 0.88 and 1.45 kg/m3. Excavators were front loaders and rope shovels. Mechanical properties of the rock, blasting characteristics and mucking rates were carefully measured. A model for the calculation of the productivity of excavators is developed thereof, in which the production rate results as a product of an ideal, maximum, productivity rate times an operating efficiency. The maximum rate is a function of the dipper capacity and the efficiency is a function of rock density, strength, and explosive energy concentration in the rock. The model is statistically significant and explains up to 92 % of the variance of the production rate measurements.
International
Si
Congress
Sixth World Conference on Explosives and Blasting
960
Place
Lisboa
Reviewers
Si
ISBN/ISSN
978-0-9550290-3-5
Start Date
18/09/2011
End Date
20/09/2011
From page
461
To page
468
Sixth EFEE World Conference on Explosives and Blasting
Participants
  • Autor: Jose Angel Sanchidrian Blanco (UPM)
  • Autor: Pablo Segarra Catasus (UPM)
  • Autor: Lina Maria Lopez Sanchez (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Ingeniería de Georrecursos y Modelización
  • Departamento: Ingeniería Química y Combustibles
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