Group Velocity and Phase Velocity Analysis of TTI Coal Seam

doi:10.19596/j.cnki.1001-246x.8151

CHINESE JOURNAL OF COMPUTATIONAL PHYSICS ›› 2020, Vol. 37 ›› Issue (6): 709-717.DOI: 10.19596/j.cnki.1001-246x.8151

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Group Velocity and Phase Velocity Analysis of TTI Coal Seam

LI Qin^1,2, ZHAO Bin^1,3, MA Suibo^1,3

1. Department of School Geology and Environment, Xi'an University of Science and Technology, Xi'an, Shaanxi 710054, China;
2. Shaanxi Provincial Key Laboratory of Geological Support for Coal Green Exploitation, Xi'an, Shaanxi 710054, China;
3. SHCCIG Yubei Coal Industry Co. Ltd., Yulin, Shaanxi 719000, China

Received:2019-09-23 Revised:2019-11-22 Online:2020-11-25 Published:2020-11-25

Abstract

Abstract: We combine group velocity formula and phase velocity formula in tilted transverse isotropy (TTI) media with elastic matrix theory in anisotropic media,and design a model in transversely isotropic (TTI) strata with inclined symmetry axis. According to the model,velocity of TTI coal bed phase velocity changes gently with the change of anisotropic parameter while group velocity change fiercely. Therefore, group velocity determines the wave field shape of anisotropic media; Within a certain range, group and phase velocity for qP wave are greater with increasing ε; Group and phase velocity for qSV wave are greater with increasing δ; Group and phase velocity for qSH wave are greater with increasing γ.

Key words: anisotropic parameters, TTI medium, phase velocity, group velocity

CLC Number:

P631

LI Qin, ZHAO Bin, MA Suibo. Group Velocity and Phase Velocity Analysis of TTI Coal Seam[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2020, 37(6): 709-717.

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Group Velocity and Phase Velocity Analysis of TTI Coal Seam

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