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Blast Design Technique Using the Bulk Emulsion Explosives in Tunnel  

Lee Jin-Moo (SK건설㈜ GEOTASK팀)
Lee Heoy (SK건설㈜ GEOTASK팀)
Lee Sang-Hun (SK건설㈜ GEOTASK팀)
Kim Hee-Do (㈜고려Nobel화약)
Choi Sung-Hyun (㈜고려Nobel화약)
Publication Information
Explosives and Blasting / v.24, no.1, 2006 , pp. 29-37 More about this Journal
Abstract
The demand of the bulk emulsion explosives is being increased more and more by using the mechanization loading system in a domestic tunnel sites. Thus, a rational design criteria that is suitable for rock and circumstance condition has been required. In this study, authors investigated a optimum specific charging weight and resonable charging weight based on domestic blasting construction cases, which were performed by using a mechanization bulk emulsion explosives loading system up to now. Authors also analyzed the blasting results and got the following formula $({\Upsilon}= 0.669 + (0.0154{\times}RMR),\;r=0.81)$ from the relationship between a optimum specific charging weight of bulk exp. and rock mass rating. A range of resonable charging weight with a drilling depth is calculated considering a rock conditions.
Keywords
bulk emulsion explosives; mechanization charging system; rock mass rating; optimum specific charging;
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