人工地震信号检测中相位信息的利用  

APPLICATION OF PHASE INFORMATION TO SIGNAL DETECTION OF ARTIFICIAL SEISMIC SOURCE

作　　者：唐杰[1] 葛洪魁[2] 王宝善[2] 陈颙[2] 

机构地区：[1]中国石油大学(华东)地球资源与信息学院,东营257061 [2]中国地震局地球物理研究所,北京100081

出　　处：《大地测量与地球动力学》2009年第3期74-76,79,共4页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(40574019);科技部社会公益重点项目(2005DIA3J117);地震行业科研专项(200808002);中国地震局地球物理研究所基本科研业务专项(DQJB07A01)

摘　　要：针对固定台接收到的小药量激发的人工震源信号信噪比低的问题,基于人工震源激发的相似性,采用相位互相关和相位权重叠加的方法检测固定台站接收到的微弱信号,提高了弱信号的检测能力,可在200 km距离处接收到数十千克当量的炸药激发的信号。In recent years more and more artificial sources are used to explore underground structures in the regional scale deep exploration. Usually, signals from artificial seismic source have low SNR （ signal to noise ratio）. Artificial source has a certain degree of repeatability among different shots. On the basis of this character, we use phase cross-correlation and phase weighted stack which can effectively improve the clarity of the signal to detect weak signal. The study shows that by use of dozens of kilograms of explosives the signal can be detected from the distance of 200 km.

关 键 词：人工地震 相位权重叠加 相位互相关 波形互相关 信噪比 

分 类 号：P631.4[天文地球—地质矿产勘探]