| 编码震源提高地震探测能力的野外实验研究 |
| |
| 引用本文： | 葛洪魁,林建民,王宝善,宋丽莉,罗桂纯,陈颙.编码震源提高地震探测能力的野外实验研究[J].地球物理学报,2006,49(3):864-870. |
| |
| 作者姓名： | 葛洪魁 林建民 王宝善 宋丽莉 罗桂纯 陈颙 |
| |
| 作者单位： | 1.中国地震局地球物理研究所，北京 100081 2 中国科学技术大学地球与空间科学学院，合肥 230026 3 中国地震局地震预测研究所，北京 100036 |
| |
| 基金项目： | 国家自然科学基金重点项目（NSFC40234038）和地震联合基金（105108）资助.致谢 此次实验中,得到中国地震局地震预测研究所陈棋福、北京市地震局徐平、白永福、牟磊育和王占英,北京大学盖增喜,浙江大学张尉和延庆张庄地震台等的大力帮助,在此表示衷心感谢. |
| |
| 摘 要： | 地球深部结构研究是地震预报和地球动力学研究的基础，传统人工地震受到探测深度、分辨率或震源能量的环保限制，探索利用小能量震源进行深部高分辨率探测技术具有重要意义.本文借鉴雷达探测中的编码原理，开展了震源编码探测实验，利用人工震源向地下发送具有独特特征的随机编码序列脉冲，作为一次等效激发，利用准确记录的编码震源的源函数与地震连续观测的互相关进行“解码”分析，获取地下信息，形成编码地震探测技术.实验表明编码地震能够大幅度提高地震探测能力，利用小能量震源获得远距离的探测和高分辨率，是一种具有重要发展前景的人工探测技术.
|
| 关 键 词： | 编码震源 互相关 信噪比 探测能力 野外实验 |
| 文章编号： | 0001-5733（2006）03-0864-07 |
| 收稿时间： | 2005-07-15 |
| 修稿时间： | 2005-07-152005-12-16 |
A field experiment study of improving the seismic detectability with coded source |
| |
| GE Hong-Kui,LIN Jian-Min,WANG Bao-Shan,SONG Li-Li,LUO Gui-Chun,CHEN Yong.A field experiment study of improving the seismic detectability with coded source[J].Chinese Journal of Geophysics,2006,49(3):864-870. |
| |
| Authors: | GE Hong-Kui LIN Jian-Min WANG Bao-Shan SONG Li-Li LUO Gui-Chun CHEN Yong |
| |
| Institution: | 1.Institute of Geophysics, China Earthquake Administration, Beijing 100081, China2 School of Earth and Space Science, University of Science and Technology of China, Hefei 230026, China 3 Institute of Earthquake Science, China Earthquake Administration, Beijing 100036, China |
| |
| Abstract: | The deep earth structure is the basis of earthquake prediction and geodynamics.Detecting with natural seismic source,i.e.,earthquakes,can reach large depth but with lower resolution.Traditional active exploration can attain to high resolution but at shallow depths,as the charge of explosion is limited by environmental factors.It is desired to develop a new technique to detect the deep structure using a low-energy seismic source.In this paper,we present a new approach to detect the low signal-to-noise ratio(SNR) seismic signal using the coding theory that is well used in radar detecting.A field experiment was carried out.We encode the seismic pulses in time domain randomly as an equivalent excitation and detect the signal by cross-correlating source signal with a seismic record at distance.The experiment shows that this approach can largely improve the detectability of seismic signal,can give high-precision seismic time delay and have great noise resistivity.Further theoretical analysis and more experiments are needed for the advancement of coding seismology. |
| |
| Keywords: | Coded seismic source Cross-Correlation SNR Detectability Field experiment |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《地球物理学报》浏览原始摘要信息 |
| 点击此处可从《地球物理学报》下载免费的PDF全文 |
|
