A Non-Ideal Detonation Model for Evaluating the Performance of Explosives in Rock Blasting |
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| Authors: | S Esen |
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| Institution: | (1) Metso Minerals Process Technology Asia-Pacific, Brisbane, Australia |
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| Abstract: | Summary A new model to predict the non-ideal detonation behaviour of commercial explosives in rock blasting is presented. The model
combines the slightly divergent flow theory, polytropic equation of state, simple pressure-dependent rate law and statistical
expressions to model the effect of confinement on detonation. The model has been designated as DeNE, an acronym for the Detonics
of Non-ideal Explosives. It is aimed at predicting the detonation state and subsequent rarefaction (Taylor) wave to provide
the pressure history for different explosive, rock type and blasthole diameter combinations. It enables the prediction and
comparison of the performance of commercial explosives in different blasting environments. The unconfined detonation velocity
data has been obtained from the testing of six commercial explosives to calibrate DeNE. A detailed sensitivity analysis has
been conducted to evaluate the model. The model has been validated using the results of hydrocodes as well as measured and
published in-hole detonation velocity data.
Author’s address: Sedat Esen, Metso Minerals Process Technology (Asia-Pacific), Unit 1, 8–10 Chapman Place, Eagle Farm, Qld
4009, Australia |
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| Keywords: | : Non-ideal detonation commercial explosives rock blasting detonation velocity |
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