用于深部探测的地震检波器低频拓展技术
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摘要
利用地震探测的方法获得地球深部精细构造,从而增强深部资源勘探和重大地质灾害预测能力,是目前地球物理学研究的热点之一.本文简要回顾了国内外深部地震探测研究的历史,分析和解释了在精确深部地震探测中保护低频地震信号的重要性和必要性.在此基础上进一步阐述了地震检波器的低频特性对获取高质量深部地震数据的意义,重点归纳总结了如何利用伺服技术、闭环极点补偿技术以及力平衡反馈技术实现地震检波器的低频拓展,并以典型深部地震探测项目为例介绍了低频检波器在深部探测中的应用及主要取得的成果.最后,结合新型材料和新型加工技术,指出了未来深部地震检波器发展的主要方向.
Utilizing seismic methods to obtain the fine structrural features in the depth of the Earth,thus enhancing the ability of deep seismic exploration and geological hazards prediction,has been one of the hotspots of geophysical research.This paper briefly reviews the history of deep seismic studies worldwide,and analyzes the importance and necessity of protecting low-frequency signals in deep seismic survey.Besides,it further elaborates that low-frequancy characteristics of geophones are of great significance to obtain high-quality deep seismic data.As a focal point,it gives a summary of how to achieve low-frequency expansion with servo technology,closed-loop pole compensation technology,and force-balance feedback technology.Based on certain typical deep seismic projects,this paper also introduces the application of low-frequency geophones and the main results obtained.Finally,with the introduction of electrochemical accelerator and MEMS geophone,it points out the main trends of future deep seismic geophones.
引文
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