祁连山气枪主动震源浮台漂移钢索悬吊控制技术  

The drift control technology of wire-suspension for air-gun source platform in the Qilian Mountain

作　　者：张元生[1] 邹锐[1] 颜文华[1] 

机构地区：[1]中国地震局兰州地震研究所,兰州市东岗西路450号730000

出　　处：《中国地震》2016年第2期438-442,共5页Earthquake Research in China

基　　金：国家自然科学基金"利用气枪重复震源研究祁连山北缘断裂带区域深部波速的时空演化"(41574044);中国地震局公益性行业科研专项"中国地震科学台阵探测--南北地震带北段"(201308011)共同资助

摘　　要：针对地下介质动态变化监测研究中的信噪比、震源可重复性和波速精确测量等关键问题,利用大容量气枪作为主动震源,构建了一套高性能的主动源探测技术系统,该系统主要由气枪震源和信号接收2部分组成。为了解决浮台偏离设定位置的问题,提出了浮台漂移控制技术。实验结果表明,该技术可以有效地解决气枪激发后浮台受到水流冲击作用而偏离设定位置的问题。本研究结果可为一定激发场地情况下的气枪主动震源重复探测工作所借鉴。There are several key issues in dynamics monitoring of subsurface,such as signal to noise ratio（SNR）,repeatability of seismic sources and accurate measurement of velocity.Using large volume air-gun source,we constructed a high-performance active system which mainly consist of air-gun excitation and signal reception,In order to reduce the platform deviating from the shot position,we put forward platform drift control technology.Experimental results show that the technology can effectively solve the problem of the dislocation of rafts caused by air-gun stimulation.The results of this study can be a reference for the repeated exploration by active air-gun seismic source in some excitation sites.

关 键 词：主动源 大容量气枪 浮台漂移 重复性 

分 类 号：P315[天文地球—地震学]