不同噪声源分布下微动台阵探测效果研究

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中图分类号：P315.4 文献标志码：A 文章编号：1000-0844（2026）01—0177—10

DOI：10.20000/j.1000-0844.20240415001

Detection effect of microtremor arrays under different noise source distributions

LI Chuanjin 1，2 ，DING Haodong'， JIAN Xiang³，ZHENG Tao¹，WANG Qiang 4

（1.School of Civil Engineering，Fujian Uniuersity of Technology，Fuzhou 350l18，Fujian，China; 2.Institute of Geotechnical Engineering，Fujian Universityof Technology，Fuzhou 35Ol18，Fujian，China; 3.Huainan City Land and Resources Law Enforcement Supervision Detachment， Huainan Municipal Bureau of Natural Resources and Planning，Huainan 232oo1，Anhui，China； 4.Niushan HoldingsGroup Co.，Ltd.，Tongling 244131，Anhui，China）

Abstract： This study performs both field tests and numerical simulations to investigate the detection effect of microtremor arrays under different noise source distributions.Field tests are conducted to compare the detection effects of different arrays in the presence and absence of obvious noise sources. A numerical analysis is conducted to simulate the diferent noise source distribution conditions and evaluate the corresponding detection effects of the different arrys.The results indicate the following observations：（1） for the circular and triangular arrays，accurate dispersion curves can be extracted，even when obvious noise sources exist near the site，earning these arrays priority in microtremor surveys；（2） for the cross-shaped arrays，accurate dispersion curves can be obtained in the absence of obvious noise sources；however，their results are affected when there are noise sources；therefore，the usage of the cross-shaped arrays must be determined based on the ambient noise conditions and the surface characteristics around the site；and （3）for the linear arrays，diffrent orientations may lead to varying exploration results；hence，they must be used with caution in microtremor surveys. In conclusion，diferent noise source distributions have significant effects on the microtremor exploration results；thus，the appropriate aray types must be selected according to the noise source distribution. It is suggested that circular and triangular arrays must be prioritized;cross-shaped arrays must be utilized depending on the situation; and linear arrays must be used cautiously.

Keywords： microtremor survey; dispersion curve;array; noise source distribution

0 引言

微动勘探作为新兴物探技术，通过台阵接收微动信号并反演面波频散曲线，可有效探测地下地质构造。（剩余12539字）