基于电火花震源的地震波CT波速影像图去噪  

Exploration of Denoising Technology based on Seismic Wave CT Velocity Image based on EDM Source

作　　者：陈卫东[1] 王逸民[1] 李叉娟 岳想平 CHEN Weidong;WANG Yimin;LI Chajuan;YUE Xiangping(PowerChina Northwest Engineering Corporation Limited,Xi'an 710065,China)

机构地区：[1]中国电建集团西北勘测设计研究院有限公司,西安710065

出　　处：《西北水电》2024年第1期45-49,共5页Northwest Hydropower

基　　金：中国地质调查局项目(D020190266)。

摘　　要：在南京某项目深部采空区采用电火花做为震源进行地震波CT探测时,发现波速影像图上出现诸多假异常,解译成果与实际地质情况不符。鉴于存在的问题,对地震波CT波速图像开展去噪研究,探索到一种使解译的速度值更加接近于实际值一种方法。实践表明,此技术可有效去除地震波CT图像波速影像图上的假异常,提高探测精度。研究成果可为物探专业的地震波CT技术发展提供借鉴。When using electric sparks as the source for seismic wave CT detection in the deep goaf area of a project in Nanjing,it is found that there are many false anomalies on the wave velocity image map,and the interpretation results are inconsistent with the actual geological conditions.In view of the existing problems,we conduct denoising study on seismic CT wave velocity images and find a method to make the interpreted velocity values closer to the actual values.Practice has shown that this technology can effectively remove noise on the velocity images of seismic wave CT images and improve detection accuracy.The study results can provide reference for the development of seismic wave CT technology in the geophysical exploration field.

关 键 词：去噪技术 地震波CT 电火花震源 高频尖脉冲信号 

分 类 号：P631[天文地球—地质矿产勘探]