Study on the application of EPS and polymer foamed particles in emulsion explosives
CHEN Huanan
GUO Yuqi
YANG Wei
MENG Fanbao
WANG Xiaohong
Abstract：Based on the thermodynamic and kinetic equilibrium disruption effects of emulsion explosives under alpine and negative pressure environment,as well as the initiation and detonation characteristics of the explosive,this study adopts polymer foaming particles(referred to as VACPM)and expandable polystyrene particles(referred to as EPS)as physical sensitizer to research the technology of physical sensitization for emulsion explosives.This study investigates the preliminary relationship among particle foaming size,the detonation velocity,as well as initiation sensitivity of explosives.The results indicate that EPS sensitizing explosives have detonator sensitivity,and the detonation velocity is from 1 986 m/s to 2 473 m/s;when the size of the polymer foam particles sensitizer is from 8.5 μm to 100 μm,the detonation velocity ranges from 4 630 m/s to 5 252 m/s.The manufacturing technology of VACPM,from material selection to process optimization,has become quite mature.And its key properties such as foaming size,uniformity and true density,as well as economic performance,still have greater room for adjustment.Compared with EPS,the VACPM is more suitable for the production and application of emulsion explosives.
Keywords：emulsion explosivephysical sensitizationEPSVACPM
Publication Date：2025-12-30
Online Publishing Date：2026-01-12(First online date of this platform, not the publication date of the document)
Pages：4( 16-19 )