Science and Technology of Energetic Materials

Vol.74, No.3 (2013)

Research paper

Experimental studies on debris hazards from explosions in subsurface magazines
Tei Saburi, Shiro Kubota, Katsumi Katoh, and Yuji Ogata


Accidental explosions in explosive facilities such as explosive magazines cause the ejection of hazardous fragments and debris as well as create airblast overpressure. Subsurface magazines are promising for mitigating these hazards and reducing the quantity-distance (QD) criteria. A subsurface magazine is constructed in the ground to mitigate the explosive hazard, and is equipped with a storage chamber, an access tunnel, and a vertical shaft used as an exit. From the viewpoint of safety assessment, it is important to evaluate the safe distance from hazardous fragments and debris associated with an explosion in a subsurface magazine. In this study, the debris produced by explosions in subsurface magazines was experimentally evaluated. Box-shaped (flat roof) and arch-shaped scale-model magazines were prepared, and scaled internal explosion tests using Composition C4 explosive were conducted at predetermined loading densities. The relationships of debris quantity-distance, mass-distance, and so on were evaluated in order to establish the suitable siting and design of explosive facilities. The results are expected to contribute to the establishment of QD regulations for the debris hazards of subsurface magazines.

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explosions, fragments and debris, subsurface magazine

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