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A Numerical Study on Pressure Variation Characteristics in Blasthole by Air-Deck  

Kang, Dae-Woo (동아대학교 에너지.자원공학과)
Hur, Won-Ho (동아대학교 에너지.자원공학과)
Publication Information
Explosives and Blasting / v.29, no.1, 2011 , pp. 1-9 More about this Journal
Abstract
Air deck charge blasting method which has been generally used in a surface mine and large scale developing site is one of the improved techniques with blasting effectiveness. Many studies and experiments have been tried to investigate the characteristics of pressure distribution in a blasting hole and increase the effectiveness of air deck charge blasting method. In this study, changes of pressure occurred in sections of air deck installed in various ways was computed and also changes of pressure with the location and length of air deck was analyzed, using numerical analysis program. Basically, all the numerical analysis was 2-Dimensional analysis and equation of status of explosives was JWL-EOS. Only to evaluate the variations of pressure in blast hole, it was assumed that rock mass is homogeneous but rock mass has different density and intensity.
Keywords
Air Deck; Pressure in blasthole; Numerical analysis; JWL-EOS;
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