摘要
由于高密度电阻率法具有成本低、见效快、方法丰富、解释简便的优点,该技术已被广泛地应用在水利水电工程建设、城市环境工程地质、农业工程地质勘察、城市建设工程勘察、建筑工程监测和考古研究等方面,获得了显著的地质效应和可观的经济社会效益。在高密度电阻率法测量数据的采集过程中,由于仪器因素、人为操作因素以及各种干扰的因素,数据含有各种噪音。本次研究以在湖北某地采集的高密度电阻率法试验数据为例,浅部噪音干扰较为严重,为了使水平分层更加清晰,通过分析测量数据的噪音类型,在数据预处理时把飞点噪音数据直接剔除,对随机噪音数据进行了五点三次平滑和五点平均平滑处理,然后使用RES2DINV软件对三种数据分别进行反演,得到各自的视电阻率反演断面图。结果显示,数据平滑处理总体上不会改变电阻率的分布特征,但是可以减少噪音干扰带来的误差,较好地压制随机噪音数据引起的小的串珠状异常,使反演结果水平分层更加连贯清晰。
Thanks to its advantages of low cost,quick effect,rich methods and easy interpretation,the high density resistivity method has been widely used in water conservancy and hydropower engineering construction,urban environmental engineering geology,agricultural engineering geological survey,urban construction engineering survey,construction engineering monitoring and archaeological research,and has achieved remarkable geological effects,considerable economic and social benefits.In the process of data acquisition by high density resistivity method,due to instrument factors,human operation factors and various interference factors,the data contain various noises.In this paper,the experimental data of high density resistivity method collected in a certain place in Hubei province is taken as an example.The shallow noise interference is relatively serious.In order to make the horizontal stratification clearer,the noise types of the measured data are analyzed,the flying noise data is directly eliminated in data preprocessing,and the random noise data is smoothed by five points cubic smoothing and five points average smoothing.Then,three kinds of data are inverted by RES2 DINV software,and their respective apparent resistivity inversion profiles are obtained.The results show that data smoothing does not change the distribution characteristics of resistivity on the whole,but it can reduce the error caused by noise interference,suppress the small beaded anomaly caused by random noise data,and make the horizontal stratification of inversion results more coherent and clear.
作者
田必林
Tian Bilin(Hubei Coal Geological and Geophysical Survey Team,Wuhan Hubei 430200,China)
出处
《工程地球物理学报》
2022年第5期708-715,共8页
Chinese Journal of Engineering Geophysics
基金
中国煤炭地质总局湖北煤炭地质局2022年度Ⅲ类科技项目(编号:ZMHB-2022-Ⅲ-04)
中国煤炭地质总局“揭榜挂帅”科研项目(编号:ZMKJ-2022-JBGS01-3)。
关键词
高密度电阻率法
飞点噪音
随机噪音
数据平滑
high density resistivity method
flying noise
random noise
data smoothing
