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祁连山气枪主动震源浮台漂移钢索悬吊控制技术
张元生 邹锐 颜文华
中国地震局兰州地震研究所,兰州市东岗西路450号 730000
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。
关键词:  主动源  大容量气枪  浮台漂移  重复性
DOI:
分类号:
基金项目:
Drift Control Technology Using Wire-Suspension for the Airgun Source Platform in Qilian Mountain
Zhang Yuansheng, Zou Rui, and Yan Wenhua
Lanzhou Institute of Seismology, CEA, Lanzhou 730000, China
Abstract:
There are several key issues in dynamic monitoring of subsurface structures, such as signal to noise ratio ( SNR ), repeatability of seismic sources and accurate measurement of velocity. Using a large volume airgun source, we constructed a high-performance active system which mainly consists of airgun excitation and signal reception. In order to reduce the platform drift from the shot position, we put forward the platform drift control technique. Experimental results show that the technique can effectively solve the problem of platform drift from the set position under fluid impact after airgun excitation. The results of this study can be a reference for repeated airgun source detection at certain excitation sites.
Key words:  Active source large volume airgun  Platform drift  Repeatability