Determination of Detonation Front Curvature Radius of Anfo Explosives and Its Importance in Numerical Modelling of Detonation With the Wood-Kirkwood Model

Tumara, Barbara Štimac; Dobrilović, Mario; Škrlec, Vinko; Sućeska, Muhamed

doi:10.17794/rgn2022.2.9

Cited by 4 publications

(3 citation statements)

References 15 publications

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“…The consequences of the non-ideal behaviour of ANFO are manifested in the strong dependence of the detonation parameters on the charge diameter [3,6,7], existence and characteristics of the confinement [8][9][10][11][12][13], in a curved shock front [2,7,[14][15][16], the existence of a fraction of unreacted ANFO at the sonic point [2,3,14], and a large failure diameter [6,16]. The effects of the confinement characteristic on the detonation properties of ANFO are studied by several researchers [8-11, 17, 18].…”

Section: Introductionmentioning

confidence: 99%

An empirical confinement model for ANFO explosive

Suceska,

Bohanek,

Dobrilovic

et al. 2024

Propellants Explo Pyrotec

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Ammonium‐nitrate‐fuel‐oil (ANFO) explosive, one of the most used mining explosives, exhibits highly non‐ideal behaviour. The non‐ideality of the detonation is manifested in the strong dependence of the detonation velocity on the charge radius and existence and the characteristics of confinement. This can lead to the detonation velocities as low as one‐third of the ideal velocity. The literature reported experimental detonation velocities of cylindrical ANFO charges confined in different confiners (aluminium, copper, steel, polymethyl methacrylate, and polyvinyl chloride) are analysed in this paper. An empirical confinement model, which relates the detonation velocity to the charge radius and the mass of the confiner to the mass of explosive ratio per unit length, is proposed. The model predicts the detonation velocity of unconfined and confined ANFO charges with a mean average percentage error of 8.8 %.

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Section: Introductionmentioning

confidence: 99%

An empirical confinement model for ANFO explosive

Suceska,

Bohanek,

Dobrilovic

et al. 2024

Propellants Explo Pyrotec

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“…The reason for the wide use of ANFO is its good blasting performance, handling safety, and low price. From a scientific point of view, ANFO explosives are interesting as a typical representative of non-ideal explosives (Bohanek et al, 2023;Short & Jackson, 2015, Tumara et al, 2022. Numerous research studies are devoted to determining the factors that impact the detonation properties of ANFO.…”

Section: Introductionmentioning

confidence: 99%

Influence of Confining Materials on Detonation Parameters of Anfo Explosive

Bohanek,

Sućeska,

Dobrilović

et al. 2024

MGPB

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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%.

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“…Determining the detonation front curvature radius involves analysing the characteristics of the explosive material and the conditions under which it is detonated. The curvature radius of the detonation front refers to the radius of the curved shock wave produced by the detonation and is a very important parameter for providing successful DBO (Štimac Tumara et al, 2022). A performance index of the selected explosive influences the determination of specific explosive consumption while DBO designing.…”

Section: Introductionmentioning

confidence: 99%

Determining the Performance of Explosives for Blasting Management

Kononenko,

Khomenko,

Kovalenko

et al. 2023

MGPB

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Experimental methods for determining a performance index of explosives are analysed: the methods of a ballistic pendulum, ballistic mortar, a lead block, and according to the volume of soil explosion funnel. It is defined that the determination of a performance index of emulsion explosives (EE) involves a set of significant features connected with a large critical diameter requiring the experiments with large-mass charges and resulting in refusal from the traditional methods of determining a performance index. Analytical methods for calculating an index of relative performance of explosives are analysed. Determination of the performance indices of explosives with the help of analytical methods helps identify considerable differences in the calculation results; in case of emulsion explosives the results are erroneously low at all. It is since analytical methods do not consider the brisant action of emulsion explosives. This paper represents the developed methodology of determining a performance index of explosives according to the degree of detonation velocity. The proposed methodology considers the key energy and detonation characteristics of explosives: heat and volume of the explosion products, density (thickness), and detonation velocity. The use of analytical methodology for calculating a performance index for all explosive types makes it possible to get correct results that are necessary for designing the parameters of drilling and blasting operations.

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Determination of Detonation Front Curvature Radius of Anfo Explosives and Its Importance in Numerical Modelling of Detonation With the Wood-Kirkwood Model

Cited by 4 publications

References 15 publications

An empirical confinement model for ANFO explosive

An empirical confinement model for ANFO explosive

Influence of Confining Materials on Detonation Parameters of Anfo Explosive

Determining the Performance of Explosives for Blasting Management

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