Tunnel and Underground Space (터널과지하공간)

Korean Society for Rock Mechanics and Rock Engineering (한국암반공학회)
권호 표지

Comparison of Fragmentation Performance of Two Different Blast Patterns

두 가지 발파 패턴의 파쇄 성과 비교

  • 피유시 라이 (전남대학교, 인도 바나라스 힌두대학교 광산공학과) ;
  • 양형식 (전남대학교 에너지자원공학과)
  • Received : 2010.09.29
  • Accepted : 2010.10.25
  • Published : 2010.10.31
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Abstract

In the present research paper large scale blasting was conducted on two different firing patterns, namely, straight V type and skewed V type pattern on the same sandstone overburden bench with similar explosives. The post-blast fragmentation assessments were made by use of digital imaging technique. The total cycle time of 10 $m^3$ rope shovels was also recorded in the field. The results reveal improvements in the fragmentation and excavator performance results for the blasts fired on skewed V type pattern. The paper discusses the skewed V firing pattern and the reasons for its superior performance vis-$\grave{a}$-vis the straight V type pattern.

이 연구에서는 사암 벤치에 대하여 V형과 경사 V형의 두 가지 기폭 패턴으로 대규모 발파를 실시하였다. 장약량은 비슷하였다. 발파 후 디지털 이미지 프로세싱 방법으로 파쇄석의 파쇄도를 평가하였다. 10 $m^3$ 용량 로우프 쇼벨의 싸이클 시간도 계측하였다. 그 결과는 경사 V형으로 기폭한 경우 파쇄성능이나 굴착기 성과가 더 향상된다는 것을 보여준다. 이 논문에서는 경사 V형 패턴이 V 형 패턴보다 더 나은 성능을 보이는 이유에 대하여 논한다.

Keywords

References

  1. Ash, R.L. and N.S. Smith, 1976, Changing borehole length to improve breakage-A case history. 2nd Society of Explosive Engineers Conference on Explosive and Blasting Techniques, Kentucky, 1-12.
  2. Jimeno, C.L., E.L. Jimeno and F.J.A. Carcedo, 1995, Drilling and Blasting of Rocks. A.A. Balkema, Rotterdam.
  3. Kanchibotla, S.S., 2001, Optimum blasting? Is it minimum cost per broken rock or maximum value per broken rock?, Conference on Rock Breaking-Explo-2001, the Aus. IMM., Hunter Valley, 35-40.
  4. Kanchibotla, S.S., W. Valery and S. Morrell, 1999, Modeling fines in blast fragmentation and its impact on crushing and grinding., Conference on Rock Breaking-Explo-99, the Aus. IMM., Kalgoorlie, 137-144.
  5. Langerfors, U. and B. Kihlstorm, 1967, Modern Technique of Rock Blasting. John Wiley & Sons Inc., New York.
  6. Marton, A. and R. Crookes, 1999, A case study in optimizing fragmentation., Conference on Rock Breaking-Explo-99, the Aus. IMM., Kalgoorlie, 35-43.
  7. Pal Roy, P. and S.K. Mondal, 1999, Techno-economic assessment of drilling and blasting parameters - some in-depth studies. Journal of Mines Metals and Fuels, 47, 381-389.
  8. Rustan, P.A., 1998, Automatic image processing and analysis of rock fragmentation - Comparison of systems and new guidelines for testing the systems. Fragblast: the International Journal for Blasting and Fragmentation, 2, 15-23.
  9. Sarathy, M.O., 1991, Delay blasting - An inexpensive tool for reduced total mining costs., The Indian Mining and Engineering Journal., 30, 51-58.
  10. Sarathy, M.O., 2000, Optimum blasting in surface mines - major issues. Seminar on Blasting Objectives and Risk Management, Hyderabad, 1-29.
  11. Singh, D.P. and V.R.S. Sastry, 1987, An investigation into the effect of blast geometry on rock fragmentation. J. Mines, Metals and Fuels, 39, 226-233.
  12. Singh, S.C., B.D. Baijal and M. Fasihuddin, 1999, Introduction of advanced blasting technology at Noamundi iron mines, Tata Search Magazine (in-house magazine), 171-175.
  13. Singh, S.P. and T. Yalcin, 2002, Effect of muck size distribution on scooping operations. J. Int. Soc. of Explosive Engineers, 1, 315-325.