The Method of Small Structure Prediction ahead with Rayleigh Channel Wave in Coal Roadway and Seismic Wave Field Numerical Simulation
详细信息
- 责任者：Yang Sitong (Key Laboratory of Depositional Mineralization & Sedimentary Minerals of Shandong Province ; College of Geological Sciences & Engineering ; Shandong University of Science and Technology ; Qingdao 266590 ; China) ; Cheng Jiulong
- 刊名：Chinese Journal of Geophysics
- 出版年：2012
- 卷期：55(2)
- 关键词：煤层 ; coal seam ; 超前地质预报 ; advance geologic prediction
- 页码：p.655-662
- 图表：13 illus., 1 table, 21 refs.
- 分类号：1004
- issnNo：ISSN0001-5733
- isbnNo：CN11-2074/P
摘要
The seismic wave field in layered coal seam is simulated with coal road model. Propagation characteristics of seismic wave in horizontally stratified coal seam are analyzed. The results showed: 1) the P-wave source in the coal bed floor before coal heading face can excite Rayleigh channel wave in coal seam; 2) the Rayleigh channel wave generates reflected Rayleigh channel wave on the small structure before coal heading face. The energy of vertical component of Rayleigh channel wave is stronger than horizontal component energy; and 3) in same conditions, the method of reflected-wave seismic prediction ahead is not applicable for detecting small structure before coal heading face. The energy of reflection waves from the interfaces of small structure before coal heading face is very low.
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