Prediction of near field overpressure from quarry blasting

This paper investigates the propagation of airblast or pressure waves in air produced by bench blasting (i.e. detonation of the explosive in a row of blastholes, breaking the burden of rock towards the free vertical face of the block). Peak overpressure is calculated as a function of blasting parame...

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Bibliographic Details
Published in:Applied acoustics 2010-12, Vol.71 (12), p.1169-1176
Main Authors: Segarra, P., Domingo, J.F., López, L.M., Sanchidrián, J.A., Ortega, M.F.
Format: Article
Language:English
Subjects:
Acoustics
Airblast
Applied sciences
Buildings. Public works
Exact sciences and technology
Explosive
Fundamental areas of phenomenology (including applications)
Geotechnics
Miscellaneous
Noise: its effects and control
Overpressure
Physics
Quarry blasting
Scaled distance
Wave reinforcement
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Summary:This paper investigates the propagation of airblast or pressure waves in air produced by bench blasting (i.e. detonation of the explosive in a row of blastholes, breaking the burden of rock towards the free vertical face of the block). 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 the polar coordinates of the position of interest (distance to the source and azimuth with respect to the free face). The model has been fitted to empirical data using linear least squares. The data set is composed of 122 airblast records monitored at distances less than 400 m in 41 production blasts carried out in two quarries. The model is statistically significant and has a determination coefficient of 0.87. The formula is validated from 12 airblast measurements gathered in five additional blasts.
ISSN:0003-682X
1872-910X
DOI:10.1016/j.apacoust.2010.07.008