LONG HOLE BLASTING METHOD USING MULTIPLE AND MULTISTAGE DISPERSION CHARGE TECHNIQUE

摘要

The present invention relates to a long hole blasting method and, more specifically, relates to a long hole blasting method using multiple and multistage dispersion charge technique, wherein an explosive force and a detonation order are controlled to prevent a dead pressure phenomenon generated in dispersion charge blasting by charging an explosive in a perforated place perforated at a predetermined depth from the ground to be covered with a filling material. The explosive comprises a main charge and an auxiliary charge having a relatively weaker explosive force than that of the main charge. After the auxiliary charge is detonated, and the main charge is detonated.;COPYRIGHT KIPO 2019