Control Effect of Vibration According to the Application Ratio of Electronic Detonator for Tunnel Blasting

터널발파시 전자뇌관 적용 비율에 따른 진동저감 효과 연구

Through existing research and construction cases during tunnel blasting, the electronic blasting method is reported to be more effective in reducing blast vibration than the normal blasting method. However, due to the high price of electronic detonators, they are only used in some blasting sites where security objects are located nearby. Accordingly, this study performed tunnel blasting tests by adjusting the ratio of electronic and non-electronic detonators. And through the research results, the reduction effect of blasting vibration according to the detonator ratio was evaluated. The research results showed that the reduction effect of blast vibration was greatest when 100% electronic detonator was applied. In addition, when more than 52% of the electronic detonator was applied, it was found that the reduction effect was similar to the reduction effect when 100% of the detonator was used.

터널발파시 기존 연구와 시공사례를 통해 전자발파 공법이 기존 발파공법보다 효과적으로 발파진동 저감효과가 탁월한 것으로 보고되고 있다. 그러나 전자뇌관의 가격이 높아 보안물건이 근접한 발파 현장에서만 일부 활용되는 실정이다. 이에 본 연구는 전자뇌관 적용 비율에 따른 진동저감 효과를 연구하기 위하여 전자뇌관과 비전기뇌관의 비율을 조절하여 터널발파 시험을 수행하였다. 연구결과 전자뇌관 100% 적용한 경우 발파진동의 저감효과가 가장 크고, 전자뇌관 비율을 일정 수준 감소시켜도 발파진동 제어 효과가 있는 것으로 나타났다.