METHODS AND APPARATUS FOR CONFIRMATION TIME BREAK (CTB) DETERMINATION AND SHOTPOINT IN-SITU RECORDING IN SEISMIC ELECTRONIC DETONATORS

摘要

Seismic blasting methods and apparatus are presented in which detonator confirmation time break (CTB) is accurately determined by maintaining an applied voltage across detonator leg wires following initiation of a firing command or signal and sensing one or more electrical parameters such as voltage and/or current, and selectively identifying a CTB representing a time at which the monitored electrical parameter indicates a successful detonation.