A Study on the Blasting Dynamic Analysis using the Measurement Vibration Waveform

실측진동파형을 이용한 발파 동해석 기법에 관한 연구

  • 최성웅 (한국지질자원연구원 지하공간연구실) ;
  • 박의섭 (한국지질자원연구원 지하공간연구) ;
  • 선우춘 (한국지질자원연구원 지반안전연구) ;
  • 정소걸 (한국지질자원연구원 지하공간연구실)
  • Published : 2004.04.01

Abstract

Dynamic analysis has been increased recently to analyze the effect of the blasting vibration on the rock mass as well as the surrounding structures. The major input parameter far the general dynamic analysis, however, is merely the blasting pressure which can be obtained from the blasting pressure-time history curves. But in case of the complicate geological condition it is not simple to apply the blasting pressure on the numerical analysis because e ground vibration characteristics should be obtained considering the complexity of ground condition. Therefore the authors tried to use the blasting vibration waveform as an input data This vinylation frequency could be obtained from the test blasting in the Pasir mine, Indonesia. Through the dynamic numerical analysis on the slopes in Pasir, the current situation of this slope could be simulated precisely.

발파작업으로 인해 발생하는 발파진동이 암반 및 주위 구조물에 미치는 영향을 분석하기 위한 동하중해석이 최근 급격히 증가하고 있다. 하지만 일반적인 동하중 해석은 발파압력이력곡선을 통하여 얻어진 발파하중을 입력 자료로 사용하고 있으므로 복잡한 지질 구조를 갖는 암반에 대해서는 그 신뢰도가 떨어지고 있다. 이에 본 연구에서는 해석 대상 지역에서의 발파작업을 통해 직접 획득된 발파진동파형을 그대로 입력 자료로 활용하였으며, 인도네시아 Pasir 노천 채광장에 대한 현장 적용을 통해 사면의 현재 상황을 수치 해석적으로 정확히 모사함으로써 발파진동파형을 입력 자료로 활용하는 기법에 대한 검증이 가능하였다.

Keywords

References

  1. International Journal of Impact Engineering v.16 Blast wave simiulation using AUTODYN2D a parametric study Chapman,T.C.;Rose,T.A.;Smith,P.D.
  2. Int. J. Rock Mech. Min. Sci & Geomech. Abstr. v.35 A study of UDEC modelling for blast wave propagation in Jointed rock masses Chen,S.G.;Zhao,J.
  3. Geotechnical and Geological Engineering v.18 Discrete element modelling of an underground explosion in an jointed rock mass Chen,S.G.;Cai,J.G.;Zhao,J.;Zhou,Y.X.
  4. Proceeding of the 4th International Symposium on Rock Fragmentation by Blasting Surface vibrations due to a buried explosive source Jiang,J.J.;Blair,D.P.;Baird,G.R.
  5. Proceeding of the 1st International Symposium on Rock Fragmentation by Blasting Computer simulation of blast-induced vibration, fracture and fragmentation process in brittle rocks Digby,P.J.
  6. Explosives and rock blasting Atlas power company
  7. Rock Blasting and Explosives Engineering Persson,P.A.;Holmberg,P.;Lee,J.
  8. Technical Report MRL 95-014 Estimation of the dynamic pressure around a fully loaded blasthole Liu,Q.;Tidman,P.;Lee,J.
  9. FLAC2D-Theory and Background(Version 4.0) Itasca Consulting Group, INC
  10. Int. J. Rock Mech. and Min. Sci. & Geomech. Abstr. v.5 Compression waves generated in rock by cylindrical explosive charges: A comparison between a computer model and field measurement Starfield,A.M.;Pugliese,J.M.
  11. KIGAM Final Report No. KJA/02P/XII/01 Geotechnical study on the stabilization for the slopes of the Pasir Coal Mine