Study on initiation reliability according to bunch-series coupling structures of shock tubes

The bunch blocks are currently used for initiating many shock tubes by detonator in blasts and its coupling structures affect the initiation reliability. The initiation reliability of bunches of shock tubes according to structures of bunch blocks has studied in experimenters. Experiments compared initiation reliability of frontal bunch block with lateral for many shock tubes and evaluated initiation reliabilities according to structure factors. Initiation reliabilities of shock tubes in a bunch for frontal block were higher than that for lateral. And the thicker and the smaller standoff distance between detonator and the inlet of a bunch of shock tubes, the more the experimentally obtained initiation reliabilities increased. Finally, the results are used in research of bunch blocks initiating many shock tubes.