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Influence of air-decoupling charge on rock blasting


Liang, W-M and Liu, Hong-Yuan and Zhou, F-J, Influence of air-decoupling charge on rock blasting, Beijing Ligong Daxue Xuebao: Transactions of the Beijing Institute of Technology, 32, (12) pp. 1215-1218,1228. ISSN 1001-0645 (2012) [Refereed Article]

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Copyright 2012 Beijing Institute of Technology

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In order to investigate the influence of decoupling charge structure on rock blasting, explosion experiments were carried out in the laboratory with cement mortar models and air-decoupling charge with different diameters. The sizes of blasting fragments were screened and the explosive strain was statistically analyzed. Different charge structures were used to numerically simulate the forming process of the cracks and crushing circles during the propagation of explosive stress wave. Experimental results indicate that, compared with coupling charge, air-decoupling charge structure could improve the distribution of fragment size and increase the utilization ratio of explosive energy. Numerical simulation also illustrates that the gap between charge and the wall of borehole could change the stress wave loading rate on the wall, prolong the action time of stress wave and gas, decrease obviously the thickness of crush zone, and lead to the improvement of blasting effect.

Item Details

Item Type:Refereed Article
Keywords:air-decoupling charge, model experiment, numerical simulation, rock blasting
Research Division:Engineering
Research Group:Civil engineering
Research Field:Civil geotechnical engineering
Objective Division:Construction
Objective Group:Construction processes
Objective Field:Civil construction processes
UTAS Author:Liu, Hong-Yuan (Dr Hong Liu)
ID Code:85089
Year Published:2012
Deposited By:Research Division
Deposited On:2013-06-13
Last Modified:2017-11-06

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