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.
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).