被动源面波三维横波速度反演在山东某矿区应用研究  

3D shear wave velocity inversion with passive seismic surface wave in a mineral exploration

作　　者：张凡斌 韩帅 曾爱平 ZHANG FanBin;HAN Shuai;ZENG AiPing(Geophysical Prospecting and Surveying Team,Shandon Bureau of Coal Geological Exploration,Jinan 250104,China;China University of Geosciences(Beijing),Beijing 100083,China)

机构地区：[1]山东省煤田地质局物探测量队,济南250104 [2]中国地质大学(北京),北京100083

出　　处：《地球物理学进展》2024年第5期2013-2024,共12页Progress in Geophysics

基　　金：山东省煤田地质局科研专项(鲁煤地科字(2022)15号)资助。

摘　　要：基于地震干涉法的被动源地震勘探通过采集天然噪声信号进行成像,无需主动激发具有低成本、环保的特点,广泛应用于工程、矿产勘探等领域,并得到了快速的发展.本文在山东某矿区开展了被动源面波成像研究,通过布设环形检波器阵列进行数据采集,经去趋势、去均值、去除强振幅等预处理流程后对所有台站对进行互相关计算,并对互相关结果进行滤波去噪来提高信噪比.之后采用双台法拾取台站对的频散曲线,利用直接反演方法直接对混合路径的所有频散曲线进行反演得到了3D横波速度结构,该速度结构较好的反映了探测区域范围内的基底和内部结构,为该区开展进一步矿产勘探提供基础数据.Passive seismic exploration based on seismic interferometry,utilizing the collection of natural noise signals for imaging,requires no active excitation,offering a low-cost and environmentally friendly approach.Widely used in engineering,mineral exploration and other fields,and has been developed rapidly.In this paper,a passive seismic surface wave imaging study was carried out in a mining area in Shandong province.A circular array of receivers was deployed for data acquisition.After preprocessing steps such as detrending,mean removal,and amplitude removal,cross-correlation calculations were performed for all station pairs.Filtering and noise reduction were applied to enhance the signal-to-noise ratio of the cross-correlation results.Subsequently,the two-station method was used to extract the dispersion curves of the station pairs,and the direct inversion method was used to directly invert all the dispersion curves of the mixed path to obtain the 3D shear wave velocity structure,which better reflected the bedrock and internal structures in the detection area.It provides basic data for further mineral exploration in this area.

关 键 词：矿产勘探 被动源地震 背景噪声 双台法 三维反演 

分 类 号：P631[天文地球—地质矿产勘探]