Recording of the number of explosions by electromagnetic methodsстатья
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Дата последнего поиска статьи во внешних источниках: 4 июня 2021 г.
Аннотация:The method of crushing rocks by group explosion of high-explosive (HE) blast-hole charges is often utilized for geological prospecting, for the development of useful ores, and other mining operations. Sometimes, unexploded detonators remain in the medium because of defects in the detonator ignition system or for other reasons, causing great danger for people during subsequent drilling of the rock. Consequently, the problem of developing new methods of detecting unexploded detonators in the bulk of rocks is a quite urgent problem.
The electromagnetic field that originates during detonator explosion is studied experimentally and theoretically in this paper. Conditions are studied for detection of signals, their duration and amplitude. The aim of the paper is to show the possibility of separate recording of electromagnetic signals from individual explosions when exploded as a group. The method investigated permits computation of the number of explosions in a series if the interval between them exceeds 0.1 ms. A method of detection of the failure of one or several detonators during a group explosion is thereby given.