新疆呼图壁人工水体大容量气枪信号发射台性能研究  

Site selection and construction of Hutubi airgun source signal transmitting seismic station and its characteristic of source

作　　者：魏斌[1] 苏金波[1] 王海涛[1] 郑黎明[1] 王琼[1] 张文来[1] 袁顺[1] 魏芸芸[1] 陈昊[2] 

机构地区：[1]新疆维吾尔自治区地震局 [2]中国地震局兰州地震研究所,兰州730000

出　　处：《中国地震》2016年第2期222-230,共9页Earthquake Research in China

基　　金：中国地震局公益性行业科研专项(201508008);国家自然科学基金(41474051);新疆维吾尔自治区科研机构创新发展基金(201316)共同资助

摘　　要：介绍了新疆呼图壁人工水体大容量气枪震源地震信号发射台的选址、建设过程及震源信号特征.从地质构造、历史地震的角度分析了地震信号发射台选址的合理性、必要性以及气枪激发池设计的合理性.利用激发池岸边的低灵敏地震仪记录到的气枪信号,阐述了气枪震源的高度重复性和人工水体气枪震源信号的稳定性,并对信号进行时频分析后得出,气枪信号的优势频率为2～6Hz.最后通过叠加的方法提高信噪比,得到呼图壁气枪震源信号的传播距离约为380km.The site selection and construction of Hutubi,Xinjiang air-gun source signal transmitting seismic station and its characteristic of source are elaborated.The rationality and necessity of the signal transmitting station location are analyzed from the view of geological structure and historical earthquake.The rationality of pool design is also analyzed on the basis to the air-gun experimental requirements.The air-gun signal recorded by the instrument beside the pool proves that air-gun source is highly reproducible.The signal time-frequency analysis proves that the dominant frequency of the air-gun is 2-6Hz.Finally,the SNR（signal to noise ratio）from superposition shows the propagation distance of Hutubi air-gun is about 380km.This study shows that the Hutubi large volume air-gun source is green,environmentally friendly and efficient and is very suitable for detecting the underground structure and monitoring the changes of the underground medium in regional scale.

关 键 词：气枪震源 选址 相关系数 频率特征 

分 类 号：P315[天文地球—地震学]