雷管在密实介质中殉爆特性的实验研究

在硬纸板中进行了雷管的殉爆实验,采用敏感部分面积只有1 mm×1 mm的PVDF传感器,测量了雷管受冲击波作用时的冲击波参数。实验得出,雷管在密实介质中受冲击波作用殉爆与否取决于冲击波压力峰值及峰值持续时间的大小,并认为冲击波压力峰值是决定雷管殉爆与否的首要因素,当冲击波压力峰值达1.29 GPa以上时,雷管都发生殉爆,而压力峰值降到1.0 GPa以后,即使冲击波作用的时间较长,雷管也未发生殉爆。雷管受冲击波作用而被殉爆时,存在一个延滞期,且延滞期随冲击波压力下降而增长。

Characteristics of Detonator Sympathetic Explosion in Densified Medium

Sympathetic explosion of detonators in chipboard was studied. The parameters of shock wave acting on detonator were measured by PVDF gauge with sensing position area 1 mm×1 mm. The results show that the sympathetic explosion of detonator depends on both the shock pressure peak and its duration,and the shock pressure peak is the chief factor. When the shock pressure peak exceeded 1.29 GPa,the sympathetic explosion happened. But when it fell to 1.0 GPa,the sympathetic explosion was not observed even the shock wave had a longer duration. The delay time was observed in sympathetic explosion of detonators,moreover,the delay time increased with the decreasing of shock wave pressure.