Abstract: Emulsion explosive generally refers to a kind of water-in-oil ( W / O) type of water-resistant industrial explosive prepared by emulsion technology. In the deep hole and deep water blasting operations,the emulsion explosive in the hole would be subjected to static pressure. In the delayed blasting,the shock wave generated by the earlier initiated emulsion explosive would produce dynamic load on the later detonated ones. When emulsion explosive is subjected to the external pressure,its internal sensitization bubbles are easy to be destroyed,and the emulsion matrix around the sensitization bubbles would be locally demulsified,resulting in the explosive " misfire" or " semi-explosion" ,this phenomenon is named " pressure desensitization" . In this paper,the study status of pressure desensitization of emulsion explosive under dynamic and static pressure is investigated,and the study methods,influencing factors and countermeasures of pressure desensitization are systematically summarized. The study results are helpful to improve the safety and construction efficiency of blasting mining,and provide a reference for the study of pressure desensitization of emulsion explosives in future

Key words: emulsion explosive,pressure desensitization,engineering blasting,delay blasting,mine mining