Considered crystallization and demulsification phenomena of emulsion explosive (EE) matrix during storage

a percolation model for EE matrix in aging process was established by the percolation theory. Accelerated aging of EE matrix was run by freeze-thaw cycles and EE matrix after every cycle was examined by optical microscope and laser particle analyzer. The observation of crystallization process in EE matrix showed that the site percolation cluster model reflected well with real situation

which the percolation threshold pc represented a rational indication of EE matrix aging degree. Combined with data in previous studies

the percolation model was used to analyze the critical phenomena of electrical conductivity change in EE during aging process. When cluster percentage reached to pc

the infinite cluster was formed such that EE changed from insulator to conductor. This percolation model can be a new method for studying relationship between microstructure and macrostability of EE matrix.