Abstract
This work reviews the technique of assessing the performance of commercial explosives through the fragmentation of cast iron blocks. The rock blasting simulation was performed through the blasting of 24 kg cast iron blocks with 35 g charges of commercial explosives. PETN was taken as reference and tests were done using a slurry water gel, an emulsion, and a gelatin dynamite. The velocity profile of each one of these explosives was investigated to ensure the proper charge off-transient operation. The wrapping cartridge influence was studied. The fragment size distribution followed the Gates-Gaudin-Schumann model better than other available statistic models. The analysis showed that the rock fragmentation profile differs from that of the cast iron, suggesting the need of an improvement in the model calculation technique. However the test compares well with the qualitative performance of these commercial explosives in rock blasting.
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