Abstract
To clarify the detonability and the performance of precompressed emulsion explosives, the detonation velocity was measured. Three types of microballoon or micro bubble were used as sensitizers for the sample emulsion explosives. The underwater explosion test was carried out to load dynamic pressure into the sample explosives. The result indicates that the decrease of detonation velocity in the sample explosives sensitized by glass microballoons was larger than that of detonation velocity in the sample explosives sensitized by resin microballoons or chemical gas bubbles. The detonability of precompressed emulsion explosive was also investigated on the initiation sensitivity test using the weak-strength detonators. It is concluded that the recovery of the detonability occurred rapidly in the sample explosives sensitized by resin microballoons and chemical gas bubbles. However, a long period was needed for the recovery of detonability in the sample explosives sensitized by glass microballoons.
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