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2021 Vol.37, Issue 10 Preview Page
The Study on Blast Effects of Stemming Materials by Trauzl Lead Block Test and High Speed 3D-DIC Systems

트라우즐 연주시험 및 고속 3차원 이미지영상상관 기법을 이용한 전색재 별 발파효과에 대한 연구

Younghun Ko1
,
Seunghwan Seo2
,
Sik Kim3
,
Youngjun Chung4
,
Moonkyung Chung5*
고 영훈1
,
서 승환2
,
김 식3
,
정 영준4
,
정 문경5*
1Member, Post doc, Dept. of Geotechnical Engineering Research (GER), Korea Institute of Civil Engineering and Building Technology (KICT)
2Member, Research Specialist, Dept. of GER, KICT
3Executive Director, Seokseong Blasting Construction Co., Ltd.
4CEO, Seokseong Blasting Construction Co., Ltd.
5Member, Senior Research Fellow, Dept. of GER, KICT
1정회원, 한국건설기술연구원 지반연구본부 박사후연구원
2정회원, 한국건설기술연구원 지반연구본부 전임연구원
3비회원, ㈜석성발파건설 상무이사
4비회원, ㈜석성발파건설 대표이사
5정회원, 한국건설기술연구원 지반연구본부 선임연구위원
*Corresponding Author
31 October 2021. pp. 13-25
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Abstract

The most widely used method for determining the blast effects of explosives is the Trauzl test. This test is used to measure the explosive power (strength) of a substance by determining volume increase, which is produced by the detonation of a tested explosive charge in the cavity of a lead block with defined quality and size. In this paper, Trauzl lead block test and High speed 3D-DIC (Digital Image Correlation) system were conducted to evaluate the stemming effect of the blast hole. The effects of stemming materials can be expressed as the expansion of the cavity in a standard lead block through explosion of the explosives. The blasting experiment was conducted with emulsion explosives. The stemming material in the blast hole of lead block, which was adopted in this study, were using sand and stone chips. Results of blasting experiment and numerical analysis showed that the expansion rates of lead block were most affected by stone chips followed by sand. Also, as result of dynamic strain measurement on the lead block surface of High speed 3D-DIC system, the displacement and surface strain on the block were the highest in the experiment case of stone chips stemming.

Keywords
Trauzl lead block test
High speed 3D-DIC
Stemming materials
Sand and stone chips

트라우즐 연주시험은 화약의 발파성능을 검증하기 위해서 널리 사용되는 시험방법 중 하나이다. 위력이 검증된 폭약을 연주블록의 발파공에 장약 및 전색하여 폭발시킨 후 발파공의 체적변화를 통해 화약의 위력 또는 전색효과 등을 측정하는 방법이라 할 수 있다. 본 연구에서는 발파 시 전색물에 따른 전색효과를 서로 비교하기 위하여 트라우즐 연주시험 및 3차원 고속카메라를 이용한 이미지영상상관기법을 도입하여 발파실험을 수행하였다. 실험에 사용된 폭약은 산업용 에멀젼 폭약을 적용하였고, 전색재료는 모래 및 잔골재를 사용하였다. 트라우즐 연주시험 및 수치해석을 통한 비교에서 표준사보다 잔골재 전색의 경우가 연주블록의 확장이 크게 나타났으며, 3D-DIC 시스템에서도 잔골재 전색의 경우가 모래전색보다 직경변화와 표면변형률 모두 높은 수치를 보였다.

References
1
Antoun, T., Herbold, E., and Johnson, S. (2012), "Dynamic Behavior of Sand", Annual Report FY 11, U.S. Department of Energy, pp.17-22. 10.2172/1047780
2
Jin, Y.H. (2017), "Study on the evaluation and selection of stemming materials for blasting demolition", Doctrol dissertation, Chonnam National University, Gwang-Ju, Korea, pp.15-20.
3
Ko, Y.H., Khaqan, B., and Yang, H.S. (2017), "Coupling Effects of Stemming Materials in Blasting Hole by AUTODYN Analysis", J. of Korean Society of Explosives & Blasting Engineering, Vol.35, No.3, pp.9-14
4
Kim, H.T. and Lee, S.E. (2011), "Stemming Effect of the Crushed Granite Sand as Fine Aggregate at the Mortar Blasting Test", J. of Korean Society for Rock Mechanics, Vol.21, No.4, pp.320-327.
5
Luo, Y.S. and Zhao, W. (2006), "Study on Orientation Fracture Blasting with Shaped Charge in Rock", J. of Univ. of Science and Technology Beijing, Vol.13, No.3, pp.193-198. 10.1016/S1005-8850(06)60042-X
6
Tang, Z., Zhicheng, Z., and Lu, Wen (1998), "The Influence of Stemming and Stemming Methods in Blasting Boreholes to Blasting Effect", J. of Southwest Institute of Technology, Vol.13, No.2, pp.64-66.
7
Wang, C. (1999), "The Action of the Blasthole Plug", J. of Univ. of Hydr. and Electric Eng, Vol.21, No.1, pp.45-49.
8
Wang, J. and Chen, B. (2005), "Theoretical Discussion on Optimization of Blasting Effect in Surface Mining", Express Information of Mining Industry, Vol.24, No.1, pp.19-21.
9
Xu, Z., Yang, J., and Guo, L. (2016), "Study of the Splitting Crack Propagation Morphology Using High-speed 3D DIC", Explosion and Shock Waves, pp.38-41.
10
Yang, J. and Yu, Q. (2018), "Laboratory Study on the Dynamic Response of Rock under Blast Loading with Active Confining Pressure", J. of Rock Mechanics and Mining Sciences, Vol.102, No.2, pp.101-108. 10.1016/j.ijrmms.2018.01.011
Information
  • Publisher :The Korean Geotechnical Society
  • Publisher(Ko) :한국지반공학회
  • Journal Title :Journal of the Korean Geotechnical Society
  • Journal Title(Ko) :한국지반공학회 논문집
  • Volume : 37
  • No :10
  • Pages :13-25
  • Received Date : 2021-08-09
  • Revised Date : 2021-10-12
  • Accepted Date : 2021-10-12
  • DOI :https://doi.org/10.7843/kgs.2021.37.10.13
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