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Case study on the Distributed Multi-stage Blasting using Stemming-Help Plastic Sheet and Programmable Sequential Blasting Machine  

Kim, Se-Won (현대산업개발)
Lim, Ick-Hwan ((주)케이이씨)
Kim, Jae-Sung ((주)대은플라즈마)
Publication Information
Explosives and Blasting / v.31, no.2, 2013 , pp. 14-24 More about this Journal
Abstract
The most effective way of the rock removing works in the downtown area is to removing rocks by splitting the rock by blasting with small amount of explosives in the hole. However environmental factors not only limit the applications but also increase the forbidden area. As this is a distributed multi-stage blasting method and to reduce vibration by applying the optimized precisioncontrol-blasting method, it is applicable in all situations. The process is to fix the stemming-help plastic sheet to the hole entrance when stemming explosives and insert detonator and explosive primer with same delay time, two or three sets. This method is more efficient in the downtown area where claims and dispute from vibration are expected. This method is easily usable by designing blast pattern even in the area where delay time blasting is difficult after multi-stage explosive stemming due to short length of blast hole (1.2~3.0m) and there is no detonator wire shortage or dead-pressure.
Keywords
Stemming-help plastic sheet; Programmable sequential blasting machine; Distributed multi-stage blasting; Precision control;
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