Asymmetric propagation of airblast from bench blasting

Segarra Catasús, Pablo and Sanchidrián Blanco, José Angel and López Sánchez, Lina María and Domingo, Jesús Felix (2011). Asymmetric propagation of airblast from bench blasting. In: "Sixth EFEE World Conference on Explosives and Blasting", 18/09/2011 - 20/09/2011, Lisboa, Portugal. pp. 79-90.

Description

Title: Asymmetric propagation of airblast from bench blasting
Author/s:
  • Segarra Catasús, Pablo
  • Sanchidrián Blanco, José Angel
  • López Sánchez, Lina María
  • Domingo, Jesús Felix
Item Type: Presentation at Congress or Conference (Article)
Event Title: Sixth EFEE World Conference on Explosives and Blasting
Event Dates: 18/09/2011 - 20/09/2011
Event Location: Lisboa, Portugal
Title of Book: Proceedings of Sixth EFEE World Conference on Explosives and Blasting
Date: 2011
Subjects:
Faculty: E.T.S.I. Minas (UPM)
Department: Ingeniería Química y Combustibles [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

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

More information

Item ID: 13231
DC Identifier: http://oa.upm.es/13231/
OAI Identifier: oai:oa.upm.es:13231
Deposited by: Memoria Investigacion
Deposited on: 29 Oct 2012 12:48
Last Modified: 21 Apr 2016 12:32
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