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- W2116824293 abstract "The problem of detecting discontinuities which interrupt coal seams is of great importance to the coal mining industry. One possible method of detecting such discontinuities is that of in-seam seismology where both source and detectors are placed under- ground on the coal face. In this paper the propagation of SH waves from a line source in the seam is investigated. There exists a particular set of waves–channel waves–, confined to the coal seam. These waves are dispersive and have an associated Airy phase whose geometrical attenuation is least. However, if absorption of energy within the coal is included then the Airy phase is the dominant wavegroup only for distances less than a certain maximum. If a detection criterion proposed by Dresen and Freystätter applies, then there is a lower limit to the frequency that should be used for exploration. This requirement may be in conflict with attenuation considerations." @default.
- W2116824293 created "2016-06-24" @default.
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- W2116824293 date "1978-03-01" @default.
- W2116824293 modified "2023-09-25" @default.
- W2116824293 title "THE PROPAGATION OF ATTENUATED SH CHANNEL WAVES*" @default.
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- W2116824293 doi "https://doi.org/10.1111/j.1365-2478.1978.tb01575.x" @default.
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