Due to coal beds existing in the middle of higher velocity wall rocks, seismic wave interferencing with each other generates guide wave propagating within coal beds and surrounding wall rocks (Liu,1994). Three dimensional channel wave propagating within homogeneous isotropic viscoelastic medium containing coal bed is simulated with an explicit, time-domain, high order staggered finite difference algorithm (Carcione, 1998). General standard linear solid (GSLS) system, representing

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... nuation characteristic at both low frequency band and high frequency band, is used to reflect viscoelastic property. Considering massive computational time-consuming, a parallel computational implementation, utilizing OpenMP strategy, allows investigation of largescale three dimensional models and/or broadband wave propagation within reasonable execution times. Downloaded 11/20/12 to 129.7.247.234. Redistribution subject to SEG license or copyright; see Terms of Use at http://library.seg.org/ Quality factor affects channel wave propagation Model 1 Vx 45ms Mode1 Vz 45ms Model 2 Vx45ms Mode 2 Vz 45ms Model 3 Vx 45ms Mode 3 Vz 45ms Model 4 Vx 45ms Mode 4 Vz 45ms Figure 2: Vx and Vy component snapshot at 45ms