METHOD AND APPARATUS FOR BLASTING ELECTRICALLY DETONATING PRIMERS

摘要

A number of detonating primers are electrically blasted by supplying a high frequency current through a bus wire formed by a pair of parallel conductors connected to each other at distal ends and having a constant impedance with which bus wire loops connected to the detonating primers via leg wires are electromagnetically coupled via a number of magnetic cores having slits formed therein. At first, one or more loops are inserted into respective magnetic core through the slit and one of the parallel conductors is also inserted into the magnetic core through the slit. When the high frequency current having a frequency from 100 KHz to 1 MHz is passed through the conductors of bus wire in opposite directions, there is induce electromagnetically secondary high frequency currents in respective loops, which are supplied to respective detonating primers for explosion.