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Numerical simulation on Air-decking Charge in the Fragmentation of Concrete

Published: 29 December 2018 Publication History

Abstract

A numerical method is proposed to study the fragmentation of concrete subjected to detonation load by explosives in borehole under air-decking charge. Four comparisons have been performed with AUTODYN-2D to investigate the effects of several conditions on the fragmentation of concrete, including Air-decking locations, air-decking ratios, initiation locations, and explosives types. The numerical results show that compared to the fully coupling borehole, air-decking charge can reduce the initial borehole pressure and redistribute the explosives energy. More detonation energy can accumulate in air-decking rather than crush rock and soil medium close to the explosive in the blast hole. Therefore, more energy may contribute to the consequent crack propagation.

References

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Melnikov, N.V. & Marchenko, L.N. 1971. Effective Methods of Application of Explosive Energy in Mining and Construction. 12th Symp. Dynamic Rock Mechanics. AIME, New York.
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Fourney, W.L., Barker, D.B. & Holloway, D.C. 1981.Model Studies of Explosive Well Stimulation Techniques. International Journal of Rock Mechanics & Mining Sciences.18 (1981), 113--116.
[3]
Dohyun Park &, Seokwon Jeon. 2010. Reduction of Blast-induced Vibration in the Direction of Tunneling Using an Air-deck at the Bottom of a Blasthole. International Journal of Rock Mechanics & Mining Sciences. 47(2010), 752--759.
[4]
Fourney, W.L., Fourney, S. Bihr & U. Leiste. 2006. Borehole Pressures in an Air Decked Situation. Fragblast. 10(2006), 47--56.
[5]
T.N. Hagan, I.M. Gibson. 1988. Lower blast hole pressures: a means of reducing costs when blasting rocks of low to moderate strength. International Journal of Mining and Geological Engineering, 6(1988), 1--13.
[6]
Liqiong Wang, Nafeng Wang, Li Zhang. 2012. Study on key factors affecting energy output of emulsion explosives in underwater explosion. Propellants, Explosives, Pyrotechnics, 37 (2012), 83--92.
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Zheming Zhu, Heping Xie, Bibhu Mohanty. 2008. Numerical investigation of blasting-induced damage in cylindrical rocks. International Journal of Rock Mechanics & Mining Sciences, 45(2008), 111--121.
[8]
Song Jinquan. 2000. Research on detonation characteristic of emulsion explosives. Doctoral Thesis, Beijing, University of Science and Technology Beijing.
[9]
Joosef Leppänen. 2006. Concrete subjected to projectile and fragment impacts: Modeling of crack softening and strain rate dependency in tension. International Journal of Impact Engineering, (32)2006, 1828--1841.

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    ISBDAI '18: Proceedings of the International Symposium on Big Data and Artificial Intelligence
    December 2018
    365 pages
    ISBN:9781450365703
    DOI:10.1145/3305275
    Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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    • International Engineering and Technology Institute, Hong Kong: International Engineering and Technology Institute, Hong Kong

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    New York, NY, United States

    Publication History

    Published: 29 December 2018

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    Author Tags

    1. AUTODYN-2D
    2. Air-decking charge
    3. Numerical simulation

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    ISBDAI '18

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    ISBDAI '18 Paper Acceptance Rate 70 of 340 submissions, 21%;
    Overall Acceptance Rate 70 of 340 submissions, 21%

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    • (2022)Research on Empirical analysis of the influencing factors of commercial banks' profit model under the background of Interest Rate LiberalizationProceedings of the 2022 5th International Conference on E-Business, Information Management and Computer Science10.1145/3584748.3584771(125-129)Online publication date: 29-Dec-2022
    • (2022)Research on performance evaluation of Intelligent community based on mixed weight modelProceedings of the 7th International Conference on Intelligent Information Processing10.1145/3570236.3570270(1-5)Online publication date: 29-Sep-2022
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