Abstract
The detonation characteristics of non-ideal explosives, especially the emulsion explosives, are critically affected by the confinement of case. In this study, we focused the shock wave propagating in case as confinement effect factor. Therefore, the objective of this study was to obtain a better understanding of the influence of shock wave propagating in case on the detonation characteristics of explosives.
The propagation of shock wave in case material and in material filled into case was investigated. Polymethylmethacrylate (PMMA), copper and aluminum were chosen as a case material. Water and the emulsion explosives were used as sample material confined in case. Good relationship between the acoustic impedance density, which is derived from the product of density and sound velocity, and detonation velocity was observed.
In addition, the detonation characteristics of emulsion explosives precompressed by shock waves induced by precursor shock wave propagating in PMMA case were investigated by another experiments. It was confirmed that the detonation characteristics of emulsion explosive was affected by the precursor shock wave propagating in PMMA case.
エマルション爆薬のような非理想爆轟特性を示す爆薬は，装填される容器でその爆轟特性が大きく影響を受けることが知られている。容器の物理的特性値が爆轟特性，特に爆速にどのような影響を及ぼすかを光学的観測手法を用いて試験室スケールで検討を行った。
容器の材質として，PMMA，銅，アルミニウムを選定し爆速測定を実施した結果，これら材質の密度と音速の積より求められる音響インピーダンス密度と，爆速との関係が良好な相関関係を示した。
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