Blast Design Technique Using the Bulk Emulsion Explosives in Tunnel

터널에서 벌크에멀젼 폭약을 이용한 발파설계기법 연구

  • Published : 2006.06.01

Abstract

The demand of the bulk emulsion explosives is being increased more and more by using the mechanization loading system in a domestic tunnel sites. Thus, a rational design criteria that is suitable for rock and circumstance condition has been required. In this study, authors investigated a optimum specific charging weight and resonable charging weight based on domestic blasting construction cases, which were performed by using a mechanization bulk emulsion explosives loading system up to now. Authors also analyzed the blasting results and got the following formula $({\Upsilon}= 0.669 + (0.0154{\times}RMR),\;r=0.81)$ from the relationship between a optimum specific charging weight of bulk exp. and rock mass rating. A range of resonable charging weight with a drilling depth is calculated considering a rock conditions.

최근 국내 터널현장에서 기계식 장전장비를 활용한 벌크에멀전 (bulk emulsion) 폭약의 수요가 증가되면서 국내 암반 및 주변여건에 적합한 발파의 합리적인 설계기준이 요구되고 있다. 본 연구에서는 현재까지 국내에서 기계식 장전장비를 활용한 벌크에멀젼 폭약을 적용하여 시공한 사례 중 굴진효율 및 여굴량이 양호한 발파결과를 근거로 암반등급별 최적 비장약량과 영역별 적정 장약량을 검토하였다. 또한, 조건을 만족하는 발파결과를 분석하여 RMR 암반분류와 벌크에멀젼 폭약의 최적 비장약량과의 상관식 $({\Upsilon}= 0.669 + (0.0154{\times}RMR),\;r=0.81)$을 얻었고, 영역별로 천공장 변화에 따른 적정 장약량 범위를 산출하였다.

Keywords

References

  1. 윤지선, 1996, 최신발파기술, 구미서관, 서울, pp. 56-57
  2. 최용근, 2005, 터널발파설계 자동화를 위한 발파 패턴 설계식 개발, 화약.발파(대한화약발파공학회지), Vol. 23, No. 4, pp. 20-21
  3. Koryo Nobel Explosives, 2004, Explosives products guide, pp. 12-13
  4. Olofsson, S. O., 1995, Applied explosives technology for construction and mining, Nora Boktryckeri AB, Sweden, pp. 31-32
  5. Hagan, T. N. and M. B. Duval, 1993, The importance of some performance properties of bulk explosives in rock blasting, Proc. of the 4th International Symposium of Rock Fragmentation by Blasting, Vienna, pp. 387-394
  6. Dyno Nobel, 2002, Mobile charging unit mini bulk PLC1000 Nr 9013-02, Rocmec system, Sweden, pp. 3-65