Influence of sensitizing agent on crystallization quantity of emulsion explosive under dynamic pressure

Abstract：Using underwater explosion test system,emulsion explosive charge was applied dynamic pressure,the blasting shockwave pressure of emulsion explosive charge was measured pre and post dynamic pressure,and pressure desensitization degree was calculated.Crystallization quantity was measured pre and post dynamic pressure by using water dissolved method.Demulsification degree of emulsion explosive was characterized by crystallization quantity.Influence of sensitizing agent content and type on demulsification degree was analyzed.Experimental results show that the crystallization quantity increases with sensitizing agent content at the same dynamic pressure,and accordingly,the desensitization degree also increases.On the other hand,at the same content of sensitizing agent,the crystallization quantity of emulsion explosive sensitized by glass micro-balloon（GMB）is less than that of sensitized by expanded perlite.The desensitization degree is also less than that of sensitized by expanded perlite.So the dynamic pressure resistance ability of emulsion explosive sensitized by GMB excels expanded perlite.Reducing properly sensitizing agent content can reduce demulsification of emulsion explosive and improve its dynamic pressure resistance ability.