利用相关检测进行地震波速变化精确测量研究进展  

Process in precise measurement of seismic velocity variation by correlated detection

作　　者：罗桂纯[1] 葛洪魁[2] 王宝善[2] 胡平[1] 陈颙[2] 

机构地区：[1]北京市地震局,北京100080 [2]中国地震局地球物理研究所,北京100081

出　　处：《地球物理学进展》2008年第1期56-62,共7页Progress in Geophysics

基　　金：国家自然科学基金重点项目(NSFC40234038);地震联合基金(105108)联合资助

摘　　要：通过地震波速度变化的精确测量,来监测地下应力随时间的变化,是进行地震物理预报的有效途径.介绍国内外关于地震波速变化精确测量所取得的各项结果和在地学中的应用,讨论了相关检测法的原理和应用.利用人工震源激发地震波,布设测线接收地震信号,将地震学和信息科学相结合,利用相关检测法,能有效排除干扰和不确定因素,进行地震波速度变化的精确测量,解决地震学一直以来面临的难题.本研究小组利用电落锤人工震源激发地震信号,以布设在同一条射线路径方向上的仪器接收,进行了30天连续观测直达波速度变化的实验研究,速度变化达到1.00E-05的精度.To monitor interior stress＇s variation which is variety by time is an effective approach of seismic physical forecast. This paper reviewed the results concerning the precise measurement of seismic velocity variation and application, discussed the principle and application of the correlated detection. Making use of active seismic source, recording seismic signal by survey disposal, and combining the seismology with communication science, using correlated detection can get rid of disturb and uncertainty factor. The approach can resolve the problem about precise measurement of seismic velocity, and offer method for seismic physical forecast. Our group carried out a field experiment to attain seismic signal by active source, and we received seismic wave by instruments on the same ray. This field experiment lasted on 30 days to detect the velocity variation of p wave, the precision of the velocity variation achieved to 1.00E-05.

关 键 词：速度变化 地下应力 地震物理预报 相关检测 

分 类 号：P631[天文地球—地质矿产勘探]