Explosives and Blasting (화약ㆍ발파)

Korean Society of Explosives and Blasting Engineering (대한화약발파공학회)
권호 표지

Explosion Modelling for Crack Propagation near Blast holes in Rock Plate

암석판재에서 발파공 부근 균열전파에 대한 폭원모델링

  • Received : 2015.03.17
  • Accepted : 2015.03.25
  • Published : 2015.03.31
Download PDF
⟨ Previous Next ⟩

Abstract

Recently, as the demand for development and utilization of underground space is increasing worldwide, the blast damaged zone has become a major issue in constructing underground structures. In this study, numerical analyses were performed for modelling a small-scale blasting of rock plates using PFC3D and ANSYS LS-DYNA. In order to verify the analysis results, several test blasts were conducted. It is concluded from the study that the numerical modelling methods well simulate the crack propagation procedure near blast holes under given conditions.

지하공간의 개발 또는 활용기술에 대한 수요가 전 세계적으로 급증함에 따라, 역학적 안정성과 활용 효율의 측면에서 발파굴착 시 발생하는 손상대 평가는 주요 관심사가 되고 있다. 본 연구에서는 PFC3D와 ANSYS LS-DYNA를 이용하여 판재시료를 대상으로 발파 예정선 주위의 소규모 모형발파에 대한 수치해석을 수행하였다. 또한, 해석 결과의 검증을 위하여 소규모 판재모형을 제작하여 발파실험을 수행하고 균열 전파양상을 비교 고찰하였다.

Keywords

References

  1. 정주환, 2010, 탄성파속도 측정법을 이용한 암반손상대 평가, 공학박사 학위논문, 전남대학교 대학원.
  2. Cundall P.A. and O.D.L. Strack, 1979, A discrete numerical model for granular assemblies, Geotechnique 29, pp. 47-65. https://doi.org/10.1680/geot.1979.29.1.47
  3. Donze F.V., J. Bouchez and S.A. Magnier, 1997, Modeling fractures in rock blasting, International Journal of Rock Mechanics and Mining Science Vol. 34, No. 8, pp. 1154-1163.
  4. Erlich D. C. and M. W. Shockey, 1983, Dynamic flow curve of 4340 steel as determind by the symmetric rod impact test, Elsevier Science Publishers, Amsterdam, pp. 129-332.
  5. Jiang J., 1993, Vibration due to a buried explosive source, Ph.D. thesis, Western Australian School of Mines.
  6. LS-DYNA keyword user's manual version 970, 2003, Livermore Software Technology Corporation.
  7. Persson P.A., P. Holmberg and J. Lee, 1994, Rock blasting and explosives Engineering, CRC press, pp. 540.
  8. Potyondy D.O. and P.A. Cundall, 1996, Modeling of shock and gas-driven fractures induced by a blast using bonded assemblies of spherical particles, Rock Fragmentation by Blasting, Balkema, Rotterdam, pp. 55-61.