2017
DOI: 10.1016/j.jappgeo.2017.01.008
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Theoretical basis and application of vertical Z-component in-seam wave exploration

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Cited by 9 publications
(5 citation statements)
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“…With simple shape, short duration, and fast convergence, the Ricker wavelet is a suitable tool for numerical simulations [18]. In the time domain, the Ricker wavelet can be expressed as: 6) where, fm is the main frequency; t0 is the initial moment.…”
Section: Parameters and Source Termmentioning
confidence: 99%
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“…With simple shape, short duration, and fast convergence, the Ricker wavelet is a suitable tool for numerical simulations [18]. In the time domain, the Ricker wavelet can be expressed as: 6) where, fm is the main frequency; t0 is the initial moment.…”
Section: Parameters and Source Termmentioning
confidence: 99%
“…However, few have tackled the influence of small structures, e.g., scouring zone, on the propagation features of the wave [4]. The propagation features of elastic waves are usually analyzed by the elastic wave equation and geological methods [5][6][7].…”
Section: Introductionmentioning
confidence: 99%
“…The measurement of observed group velocity is generally performed through multiple filtering and time-frequency analysis (Bhattacharya, 1983;Cox & Mason, 1988). The guided or seam waves generate very strong Airy phase, which is marked by a minimum or maximum of group velocity in a dispersion curve (Czarny et al, 2021) and is most suited to ISS experiment (He et al, 2017;Ji et al, 2019). The Airy phase has large amplitude because it is a stationary phase that accumulates energy from nearby frequencies (Ewing et al, 1957;Krebes, 2019).…”
Section: Introductionmentioning
confidence: 99%
“…Guided waves propagate in coal seam where such waves are also called channel or seam waves (Evison, 1955). P‐ and S‐wave velocities in coal seam are nearly half of those in the host rock; thus, coal seam acts as a wave guide with modes excited strongly by sources placed within the seam through in‐seam seismic survey (ISS) experiments (Yancey et al., 2007; Schott & Waclawik, 2015; He et al., 2017; Zhu et al., 2019). Guided or channel waves are dispersive as in surface waves or interface waves.…”
Section: Introductionmentioning
confidence: 99%
“…In the prevention and control of mine water disaster, the way of drilling combined with geophysical exploration is often used to advance water exploration and release. The geophysical exploration methods include Seismic channel wave exploration [1], resistivity method, transient electromagnetic method and audio frequency electric method perspective. The No.8 coal seam currently being mined by four mines is affected by the top and bottom aquifers during mining.…”
Section: Introductionmentioning
confidence: 99%