【摘要】 设计了一套观测系统,利用人工震源激振,开展了为期1个月的地震波速度变化精确测量的实验研究,利用信号相关检测方法,精确地测量了地震波走时的变化,这种变化与实验场地附近的固体潮和深井水位变化具有较好的相关性.将此次实验与国际上其它类似的实验相比,我们的实验具有突出的特点:观测时间长、测量基线长、使得波速变化的观测精度达到10-5.实验结果表明,通过对地震波速度的精确观测,可实现对地下介质应力状态和物性变化的连续监测.更多还原

【Abstract】 Base on an observation systems and an artificial seismic source,Our research group conducted a 30-day field exploration experiment to measure accurately the seismic-wave velocity changes by the correlation test method.Experimental results show that the correlation test of the first arrivals made the measurement accuracy of seismic-wave velocity up to10-4 to 10-5.The seismic-wave velocity variation showed a synchronous relationship with the variation of groundwater level in a deep well near the test site.This means by the precise measurement of seismic wave travel time variety we can obtain the changes of the stress field and physical properties of the medium in the Earth’s interior.更多还原