IGGCAS OpenIR  > 岩石圈演化国家重点实验室
Calculation method for theoretical dispersion curves of seismic channel waves considering variation of coal-seam thickness and analysis of dispersion characteristics
Qiao YongHu1,2; Teng JiWen2,3
2018-08-01
Source PublicationCHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
ISSN0001-5733
Volume61Issue:8Pages:3374-3384
AbstractIn channel-wave seismic exploration, dispersion features are used to invert structures of coal seams. So calculation of theoretical dispersion curves is an important subject. We can calculate dispersion curves when the coal-thickness keeps unchanged by utilizing the calculation method for surface wave dispersion of a horizontal stratified model. But this method is inapplicable when the coal-seam thickness changes. For a coal-bearing three-layer model, this work proposes a calculation method for theoretical dispersion curves when the coal-seam thickness fluctuates, which is based on the calculation method for dispersion curves of horizontal stratified models. We also analyze the characteristics of dispersion curves for different models of varied coal-seam thickness. Our research shows that unlike unchangeable coal-thickness model, group velocity of a changeable coal-thickness model becomes a function related to frequency and projective ray paths in horizontal plane. The change of coal-seam thickness along the ray route leads to squeezing effect of dispersion curves in velocity's direction, narrowing the range of group velocity and increasing the minimal group velocity at airy phase. The dispersion curve of the linearly changing coal-seam thickness model relates only to the thickness at the start and end of ray paths, while the curve shape does not change compared with the unchangeable coal-seam thickness model. The dispersion curve shape of a nonlinearly varied coal-seam thickness model may case change in the shape of dispersion curves with respect to the model with constant coal-seam thickness.
KeywordSeismic channel wave Coal-seam thickness variation Ray path Theoretical dispersion curve Dispersion characteristics
DOI10.6038/cjg2018K0684
WOS KeywordHALF-SPACE ; LAYERED MEDIA ; COMPUTATION ; SH
Language英语
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000442058500023
PublisherSCIENCE PRESS
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/89171
Collection岩石圈演化国家重点实验室
Corresponding AuthorQiao YongHu
Affiliation1.Shanxi Normal Univ, Linfen 041000, Shanxi, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
3.Jilin Univ, Changchun 130026, Jilin, Peoples R China
Recommended Citation
GB/T 7714
Qiao YongHu,Teng JiWen. Calculation method for theoretical dispersion curves of seismic channel waves considering variation of coal-seam thickness and analysis of dispersion characteristics[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2018,61(8):3374-3384.
APA Qiao YongHu,&Teng JiWen.(2018).Calculation method for theoretical dispersion curves of seismic channel waves considering variation of coal-seam thickness and analysis of dispersion characteristics.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,61(8),3374-3384.
MLA Qiao YongHu,et al."Calculation method for theoretical dispersion curves of seismic channel waves considering variation of coal-seam thickness and analysis of dispersion characteristics".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 61.8(2018):3374-3384.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Qiao YongHu]'s Articles
[Teng JiWen]'s Articles
Baidu academic
Similar articles in Baidu academic
[Qiao YongHu]'s Articles
[Teng JiWen]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Qiao YongHu]'s Articles
[Teng JiWen]'s Articles
Terms of Use
No data!
Social Bookmark/Share
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit Add to Technorati
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.