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Effects of decoupled charge blasting on rock fragmentation efficiency


Liang, WM and Liu, H and Yang, XL and Williams, DJ, Effects of decoupled charge blasting on rock fragmentation efficiency, Harmonising rock engineering and the environment : proceedings of the 12th ISRM International Congress on Rock Mechanics, 18-21 Oct. 2011, Beijing, China, pp. 1237-1240. ISBN 978-0-415-80444-8 (2011) [Refereed Conference Paper]

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Copyright 2012 Taylor & Francis

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Laboratory experiments and numerical modelling are conducted to investigate the effects of decoupled charge blasting on rock fragmentation efficiency. It is concluded that the gap between the explosive and the borehole wall in decoupled charge blasting decreases the peak of the shock wave, extends the action time, and weakens the loading strain rate, which correspondingly reduces the crushed zone and improves the explosive energy utilisation ratio.A method is proposed to quantify the optimal decoupled coefficient range for optimal rock fragmentation in decoupled charge blasting.

Item Details

Item Type:Refereed Conference Paper
Keywords:blasting, dynamics, lab testing, numerical modelling, rock failure
Research Division:Engineering
Research Group:Civil engineering
Research Field:Civil geotechnical engineering
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in engineering
UTAS Author:Liu, H (Dr Hong Liu)
ID Code:76196
Year Published:2011
Deposited By:Engineering
Deposited On:2012-03-01
Last Modified:2014-08-06
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