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Descripción
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| 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. | |
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Internacional
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Si |
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Nombre congreso
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10th International Symposium on Rock Fragmentation by Blasting (FRAGBLAST 10) |
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Tipo de participación
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960 |
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Lugar del congreso
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Nueva Delhi, India |
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Revisores
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Si |
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ISBN o ISSN
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9780415621434 |
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DOI
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Fecha inicio congreso
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26/11/2012 |
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Fecha fin congreso
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29/11/2012 |
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Desde la página
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579 |
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Hasta la página
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586 |
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Título de las actas
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Rock Fragmentation by Blasting |