摘要
介绍了一个高精度磁测、高密度电法和CSAMT法(可控源音频大地电磁)在山东省济南市铁矿采空区勘查中的应用实例,首先在工区内进行高精度磁测圈定磁异常区域,然后在异常区域内采用高密度电法和CSAMT法对采空区进行探测。120 m深度范围内采用高密度电法,100~200 m深度范围内采用CSAMT法探测。研究总结了铁矿采空区勘探中取得的实际地质效果,主要研究结果有:①依据地层磁性和电性差异划分了闪长岩侵入界面。②较准确地圈定了采空区的分布范围。后期进行了钻探验证,结果较吻合,为综合治理工作的开展提供了基础性资料。
In this paper,an application example of high-precision magnetic measurement,high-density electrical method and CSAMT method in the exploration of goaf in iron ore mines in Jinan City,Shandong Province is introduced.Firstly,an anomalous area of high-precision magnetic measuring circle is determined in the work area,then the goaf area is detected in an abnormal area using high-density and CSAMT method.The high-density electrical method is used in the range of 120 m depth,and the CSAMT method is used in the range of 100~200 m depth.The actual geological effects of the iron ore goaf exploration are summarized.The main research results are as follows:①the intrusive interface of diorite is divided according to the magnetic and electrical differences of the formation.②the distribution range of goaf is delineated more accurately.Later drilling verification is carried out and the results are more consistent with each other,which provides basic data for the development of comprehensive treatment work.
作者
时彦芳
朱钊锐
李波
SHI Yanfang;ZHU Zhaorui;LI Bo(Shandong Geology and Mineral Exploration and Development Bureau 801 Hydrogeology Engineering Geological Brigade,Ji’nan 250014,China)
出处
《华北地震科学》
2020年第2期52-57,共6页
North China Earthquake Sciences
基金
山东省地质勘查项目“山东省1:5万区域水文地质调查(新泰幅、新汶幅)”(鲁勘字[2018]44号)。
关键词
高精度磁测
CSAMT法
高密度电法
铁矿采空区
high-precision magnetic testing
CSAMT method
high-density electrical method
iron ore goaf
