世界核地质科学2025，Vol.42Issue(5)：1020-1028,9.DOI:10.3969/j.issn.1672-0636.2025.05.009
线性干扰对天然微动地震面波低频信息的影响分析
Analysis on the linear interference impact on the low-frequency surface wave of natural microtremor
摘要
Abstract
Due to the well-distributed high-frequency ambient noise sources(>1 Hz)near the Earth's surface and the advantages of high-efficient and low-cost,significant researches and applications of natural microtremor exploration method have been conducted in the fields of engineering investigation and urban underground space detection in recent years.The method can achieve fine detection of velocity anomalies at depths less than 200 meters.However,due to the limited distribution of low-frequency ambient noise sources(≤1 Hz),natural microtremor exploration methods are still in the experimental stage for detecting the metallogenic environments of deep mineral resources such as uranium and coal.Furthermore,linear interferences caused by factors such as wind noise and the nonuniform distribution of ambient noise sources further affects the quality of reconstructed virtual-source seismic records,destroys the low-frequency components of effective seismic surface waves and reduces the depth and effectiveness of natural microtremor exploration.To improve the application effects of natural microtremor method in the exploration of sandstone-type uranium deposit,a comparative study was conducted based on both simulated and measured data to analyze the destructive effects of linear interference on the low-frequency surface waves of natural microtremor.It was found that high-resolution linear radon transform technology can effectively suppress linear interference in virtual-source seismic records,significantly broaden the frequency bandwidth of seismic surface waves.This,in turn,establishes a reliable data foundation for the inversion of deep velocity information and help to the effective detection of metallogenic environmental information for deep mineral resources such as uranium and coal.关键词
天然微动/环境噪声/线性干扰/地震面波Key words
natural microtremor/ambient noise/linear interference/seismic surface wave分类
天文与地球科学引用本文复制引用
乔宝平,黄昱丞,刘武生,贾立城,张濡亮,汪硕,段书新,李淮阳,胡渤..线性干扰对天然微动地震面波低频信息的影响分析[J].世界核地质科学,2025,42(5):1020-1028,9.基金项目
核技术研发项目(编号:物H2401)资助 Supported by Nuclear Technologr R&D Program(No.物H2401) （编号:物H2401）
