On the improvement for blasting technology (A history of the explosives engineers society of Korea)

폭파 기술의 발전 (우리 학회의 발자취)

In '50, It was turnning point of tunneling technology that v-cut of single Face replaced by Burn cut.. Which was a standard Blasting formula. In '70, We faced Seoul Sub-Way construction by NATM. As it was damages to the Structure on the surface, finally we made empirical formula. For Granite $V=kw^{0.57}D^{1.75}$ For Grneiss $V=KW^{0.5}D^{1.75}$ For Concrete breaker $V=KW^{0.5}D^{1.75}$ (K=7) The magnitude of groun vibration can be reduced as using follow matters. First, by using explosive that have low dencity and low Velocity of detonation. Second adopting two stage deck charging, third, by using Milli Second electric Caps and Multi-Sequency blasting machine.

본 논문은 10월 29일 서울교육문화원 강당에서 한화가 주최한 바 있는 제1회 한화 기술 심포지움에 초청강사로서 발표한 내용을 요약한 것이다.