An experimental study on the effect of density on the bursting speed performance of emulsion explosives

This study investigates the influence of density and bubble distribution on the performance of emulsion explosives through physical sensitization by incorporating expanded perlite (5%–25%) to adjust density. The detonation velocity was measured using a continuous velocity meter. The results demonstrate that as the perlite content increases, the density of the emulsion explosives decreases, while the detonation velocity exhibits a nonlinear trend of initial increase followed by a decline. The maximum detonation velocity of 4713 m/s was achieved at 10% perlite content. However, when the content reached 25%, the explosive became completely desensitized, with a detonation velocity of 0. These findings provide a theoretical basis for addressing misfire issues in emulsion explosives by directly modifying density and optimizing bubble distribution.