현장 시험시공을 통한 MDS 발파공법의 효율성에 관한 연구
A Study on Effectiveness of the MDS Blasting Method through Field Test Construction
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초록
MDS 발파공법은 혼합기폭과 발파 보조용 충전층을 활용하여 발파효율은 높이고 발파공해는 감소시키 는 공법이다. 본 연구에서는 MDS 발파공법의 효율성을 국토교통부에서 제시한 표준발파공법과 비교하 기 위해 2개의 현장에서 총 4회의 시험시공을 수행하였으며, 회차별로 현장의 암질과 파쇄체적, 발파진 동 및 소음을 측정하였다. 암질은 1회차와 4회차 시험시공에서 표준발파 구역과 MDS발파 구역이 유사 한 수준으로 측정되었으나, 2회차와 3회차에서는 국부적으로 차이가 있음을 확인하였다. 파쇄체적은 MDS발파가 표준발파에 비해 회차별로 각각 25.2%, 26.1%, 16.1% 및 26.5% 증가하였으며, 발파 진동과 발파소음은 전 회차에서 평균 15% 내외 및 평균 5% 내외 감소하였다. 따라서 본 연구에서 수행 된 현장 시험시공을 통해 표준발파공법 대비 MDS 발파공법의 효율성이 정량적으로 확인되었다.
Abstract
The MDS blasting method enhances blasting efficiency and reduces blasting vibration and noise utilizing mixture detonation technique and the Rock-filled deck. This study compared the efficiency of the MDS blasting method with the normal blasting method recommended by MOLIT through four test constructions conducted at two different sites. For each test round, rock quality, excavated rockmass volume, and blasting vibration and noise levels were measured and analyzed. Rock quality was found to be similar between the normal and the MDS blasting areas in rounds 1 and 4, but showed localized differences in rounds 2 and 3. Excavated rockmass volume increased by 25.2%, 26.1%, 16.1% and 26.5% in the MDS blasting compared to the normal blasting for each round, while blasting vibration and noise decreased by approximately 15% and 5%, respectively. These results quantitatively confirm efficiency of the MDS blasting method compared to the normal blasting method, even though considering differences in rock quality.
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