Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Land-reflection type
Reexamination Certificate
2009-01-07
2011-10-04
Keith, Jack (Department: 3663)
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Land-reflection type
C181S108000, C181S113000
Reexamination Certificate
active
08031555
ABSTRACT:
A method and system for determining the location of miners trapped in an underground mine that includes recording a reference seismic signature for each of a plurality of underground base stations in the mine in advance of an emergency. The reference seismic signatures are created by generating first a seismic signal with a high signal-to-noise ratio at each base station, monitoring the signal with a permanent array of surface seismic sensors, and recording each unique signature on a central computer. In the event of an emergency, trapped miners can generate a second seismic signal at any of the underground base stations which can be easily identified with the central computer by using the pre-recorded reference seismic signature to overcome a weak signal-to-noise ratio.
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Keith Jack
Murphy Daniel L
Thorpe North & Western LLP
University of Utah Research Foundation
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