Original scientific paper

https://doi.org/10.17794/rgn.2024.1.4

INFLUENCE OF CONFINING MATERIALS ON DETONATION PARAMETERS OF ANFO EXPLOSIVE

Vječislav Bohanek orcid.org/0000-0002-1353-7793 ; University of Zagreb, Faculty of Mining, Geology and Petroleum Engineering, Pierottijeva 6, 10000 Zagreb, Croatia *
Muhamed Sućeska orcid.org/0000-0002-1418-6032 ; University of Zagreb, Faculty of Mining, Geology and Petroleum Engineering, Pierottijeva 6, 10000 Zagreb, Croatia
Ivana Dobrilović orcid.org/0000-0001-8271-205X ; University of Zagreb, Faculty of Mining, Geology and Petroleum Engineering, Pierottijeva 6, 10000 Zagreb, Croatia
Paulo Pleše ; DOK-ING ltd., Slavonska avenija 22 G,10000 Zagreb, Croatia

* Corresponding author.

Abstract

Due to the low manufacturing cost and ease of handling, ammonium nitrate-fuel oil (ANFO) is one of the most popular mining explosives. ANFO explosive is a typical representative of non-ideal explosives, which means that its detonation properties are strongly dependent on the charge diameter and the existence and properties of the confinement. In this work, the effect of different confining materials on the detonation properties of ANFO explosive is studied experimentally, and by hydrocode simulation by varying charge diameter, and the type and thickness of the confining materials. The results show that, along with the diameter of the charge, density and thickness of the confining material have a key impact on the detonation properties. An empirical confinement model, applicable in the range 0.3 < mC/mE < 15, is proposed. The model enables the estimation of detonation velocity of confined ANFO charges with a mean absolute percentage error (MAPE) of 14.25%.

Keywords

explosives; ANFO; confinement; detonation; AUTODYN; confinement model

Hrčak ID:

314807

URI

https://hrcak.srce.hr/314807

Publication date:

1.3.2024.

Article data in other languages: croatian

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