Calculation method for theoretical dispersion curves of seismic channel waves considering variation of coal-seam thickness and analysis of dispersion characteristics
文献类型：期刊论文
| 作者 | Qiao YongHu1,2; Teng JiWen2,3 |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2018-08-01 |
| 卷号 | 61期号:8页码:3374-3384 |
| 关键词 | Seismic channel wave Coal-seam thickness variation Ray path Theoretical dispersion curve Dispersion characteristics |
| ISSN号 | 0001-5733 |
| DOI | 10.6038/cjg2018K0684 |
| 英文摘要 | In 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. |
| WOS关键词 | HALF-SPACE ; LAYERED MEDIA ; COMPUTATION ; SH |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000442058500023 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/89171]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Qiao YongHu |
| 作者单位 | 1.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 |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：地质与地球物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。