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Physical and Technical Evaluation of Possibility Using Low-density Explosives in Smooth Blasting

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Author S A Gorinov and I Y Maslov
ID P201507061

Description

It was demonstrated that the stable propagation of the explosive process is possible in low-density emulsion explosives (EEs) obtained through mixing of emulsion with a significant amount of expanded polystyrene (or other similar) granules. Such a process takes place in the form of a detonation-like wave of emulsion drops in explosive gas streams flowing out of the high-pressure area of the reaction zone.

Chemical reaction in such EEs takes place in the form of surface combustion of emulsion particles interacting with the gas stream.

A method was developed for determining parameters of decomposition of low-density EEs, and it was demonstrated that a gradual pressure increase takes place in products during the explosion of such EEs.

The performed analytical research allowed low-density EEs (obtained through mixing of emulsion with a significant amount of expanded polystyrene) to be recommended for smooth blasting.

Industrial-experimental blasts at quarries of Ural and Siberia, with extreme positioning of sides and using low-density EEs, have confirmed the viability of the recommendations given.

The obtained results are useful in the advancement of smooth blasting technology using low-density EEs.

CITATION:

Gorinov, S A and Maslov, I Y, 2015. Physical and technical evaluation of possibility using low-density explosives in smooth blasting, in Proceedings 11th International Symposium on Rock Fragmentation by Blasting, pp 555–564 (The Australasian Institute of Mining and Metallurgy: Melbourne).