Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Evaluation of ANFO performance with cylinder test
Year:2012
Research Areas
  • Engineering
Information
Abstract
Cylinder test allows knowing the expansion of a copper cylinder by the detonation of an explosive charge inside. This test, originally designed for high explosives, has been adapted for industrial explosives with non-ideal behavior. The cylindrical geometry of the charge, the expansion ratio, the Velocity of Detonation (VOD) and the behavior of the explosive are in line with typical conditions in rock blasting. Pins are located at different radial distances to record time-displacement curve, from which tube velocity is obtained. A total of 10 cylinder test were carried out: 5 with 50 mm diameter (C-50) and 5 with 100 mm diameter (C-100). ANFO with a charge density of 0.83 g/cm3, was located inside the copper cylinder with the VOD cable, so the tube wall expansion and VOD were measured simultaneously. The repetitively of the test can be considered satisfactory since the relative uncertainties obtained for Gurney energy, are 2.5% for C-50 and 3% for C-100. The influence of the diameter on cylinder test results has been investigated, concluding that diameter affects to the VOD and initial acceleration. Although both Gurney energy and Gurney velocity increases as the cylinder diameter does, no statistical differences between the means can be assessed.
International
Si
Congress
10th International Symposium on Rock Fragmentation by Blasting (FRAGBLAST 10)
960
Place
Nueva Delhi, India
Reviewers
Si
ISBN/ISSN
9780415621434
Start Date
26/11/2012
End Date
29/11/2012
From page
579
To page
586
Rock Fragmentation by Blasting
Participants
  • Autor: Lina Maria Lopez Sanchez (UPM)
  • Autor: Jose Angel Sanchidrian Blanco (UPM)
  • Autor: Pablo Segarra Catasus (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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