| 摘要 |
An explosive package 101(2) is provided for use in seismic exploration which comprises a seismic charge 204 and an addressable switch 201 for selecting that seismic charge for detonation. A fireset 202 is operatively coupled to the addressable switch for receiving a firing voltage via the addressable switch 201 and for producing an actuation voltage. The actuation voltage may, for example, be produced by increasing the magnitude of the firing voltage. The actuation voltage Is provided to a detonating device 203, which is a device that contains secondary explosives. Examples of a detonating device include an exploding bridge wire detonator EWB, an exploding foil Initiator detonator EFI and a semiconductor bridge slapper device SCB. Such explosive packages may be arranged in a system for use in seismic exploration which comprises a base unit (102, Fig1) for providing selection, firing and trigger signals and a plurality of explosive packages (101(1)-101(n), Fig1) that are located at spaced intervals along the earth's surface. The explosive package 101(2) may be assembled In the factory as opposed to being assembled in the field and may be safely transported and stored while assembled with its own circuitry for initiation. |
