| 摘要 |
This invention is a method of generating seismic waves, for example for use in seismic geophysical prospecting, which involves forcing liquid explosive below the surface of the earth through a conduit to form a localized accumulation in an unstable formation which may be water, marsh, loose soil, etc. The liquid explosive has sufficient body so that it disperses only slowly through the formation. After this accumulation is placed it is detonated from the earth's surface to produce seismic waves. Preferably the liquid explosive is formed in place from two or more components, each of which has very little tendency to detonate prior to mixture, and each of which is pumped down a separate conduit, which increases the safety of the procedure. The detonation is accomplished remotely by sudden application of pressure, for example by exploding a thin, substantially continuous column of the liquid explosive between the detonator and the localized accumulation, or by exploding a column of gas between detonator and accumulation. If the unstable earth formation contains a substantial amount of solids, such as in the case of marsh or loose earth, a rod-like solid member is forced down into the formation and then partly withdrawn to form a cavity which is filled with liquid explosive through conduits provided in this member.
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