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Blast Coefficient for Bench Blasting  

Kim, Hee-Do ((주)고려노벨화약 기술영업팀)
Kim, Jung-Kyu (전남대학교 에너지자원공학과)
Ko, Young-Hun (전남대학교 에너지자원공학과)
Noh, You-Song (전남대학교 에너지자원공학과)
Shin, Myeong-Jin (전남대학교 에너지자원공학과)
Yang, Hyung-Sik (전남대학교 에너지자원공학과)
Publication Information
Explosives and Blasting / v.33, no.1, 2015 , pp. 1-12 More about this Journal
Abstract
In this study, the domestic bench blasting sites were researched to set the blast coefficient C according to the type of rock and type of industry. With the use of the experimental data on the representative industrial explosives and the data of the manufacturers'data on explosives, powder coefficient e was set up. The blast coefficient C was 0.21~0.30 when the average value for 5 representative kinds of rocks including granite was searched. The blast coefficient C for quarrying, mining and construction sites were 0.22, 0.13 and 0.26 respectively. On the other hand, powder coefficient e was obtained in four elements such as reactive energy, ballistic mortar test, VOD, Langefors'strength per unit weight. e value for emulsion which is one of the representative explosives was found to be 1 while those of high performance emulsion and ANFO were found to be 0.9 and 1, respectively.
Keywords
Blast coefficient; Powder coefficient; Ballistic mortar test; VOD; Langefors'strength per unit weight;
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