水库地震监测台网干扰源及其波形特征分析

Interference Sources and Waveform Characteristic Analysis of Seismic Monitoring Network of Reservoir

水库地震监测台网记录到的外界干扰在一定程度上会误导水库地震记录的识别和分析,爆破、滑坡等干扰源影响了地震记录的准确性,如果不能及时剔除,会影响地震记录的研究。为识别和排除某水库地震监测台网记录的干扰波形,本文利用该台网记录的主要干扰源如爆破、滑坡、机械震动以及人为干扰等波形,分别对这些干扰源的特征进行研究。发现这些干扰源除了宏观特征识别外,在初动方向、持时、振幅比和功率谱等方面同样具有其独有的特征。这些特征有助于剔除干扰源,具有重要的现实意义。

The external interference recorded by the reservoir seismic monitoring network will mislead the identification and analysis of the reservoir seismic record to a certain extent, and the interference sources such as blasting and landslide affect the accuracy of the seismic record. In order to identify and eliminate the disturbance wave recorded by a reservoir seismic monitoring network, in this paper, using the main interference sources recorded by this network such as blasting earthquake, landslide, mechanical vibration and human disturbance,the characteristics of these interference sources are studied respectively. It is found that, these interference sources in addition to macroscopic feature recognition, there waveform has its unique characteristics in other aspects such as initial direction, duration, amplitude ratio and power spectrum which have great practical significance to eliminate these types of interference sources.