Memorias de investigación
Ponencias en congresos:
Asymmetric propagation of airblast from bench blasting
Año:2011
Áreas de investigación
  • Ciencias de la tierra,
  • Aeroacústica y vibraciones,
  • Ingenieria civil
Datos
Descripción
This paper investigates the propagation of airblast from quarry blasting. Peak overpressure is calculated as a function of blasting parameters (explosive mass per delay and velocity at which the detonation sequence proceeds along the bench) and polar coordinates of the point of interest (distance to the blast and azimuth with respect to the free face of the blast). The model is in the form of the product of a classical scaled distance attenuation law times a directional correction factor. The latter considers the influence of the bench face, and attenuates overpressure at the top level and amplifies it at the bottom. Such factor also accounts for the effect of the delay by amplifying the pressure in the direction of the initiation sequence if the velocity of initiation exceeds half the speed of sound and up to an initiation velocity in the range of the speed of sound. The model has been fitted to an empirical data set composed by 134 airblast records monitored in 47 blasts at two quarries. The measurements were made at distances to the blast less than 450 m. The model is statistically significant and has a determination coefficient of 0.869.
Internacional
Si
Nombre congreso
6th EFEE World Conference on Explosives and Blasting
Tipo de participación
960
Lugar del congreso
Lisboa
Revisores
Si
ISBN o ISSN
978-0-9550290-3-5
DOI
Fecha inicio congreso
18/09/2011
Fecha fin congreso
20/09/2011
Desde la página
79
Hasta la página
90
Título de las actas
Lisbon Conference Proceedings
Esta actividad pertenece a memorias de investigación
Participantes
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Ingeniería de Georrecursos y Modelización
  • Departamento: Ingeniería Química y Combustibles