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类中梯装置三维激电成像技术兼顾了激电测深与激电剖面二者的特点,能快捷高效的获得测区三维电阻率及极化率信息,空间分辨率高,探测深度大。本文从类中梯装置的数据采集方式入手,阐述了采用类中梯装置进行三维激电成像的工作方式.建立了一个三维地电模型,采用类中梯装置进行三维正演模拟,并进行反演及成像。数值模拟结果表明,采用类中梯装置进行三维激电成像能较好地刻画实际地电模型的特点。以甘肃省某多金属矿为例,利用阵列式电磁法综合测量系统,进行了三维大功率激电成像技术的应用研究。实际应用结果表明,采用三维激电成像技术,可以多角度、多细节显示测区地下介质电阻率、极化率的分布情况,明确电性突变界面的延展状态,快速圈定成矿有利区。该研究对多金属矿产勘探等领域具有一定的指导性意义。
The three-dimensional (3D) electromagnetism imaging technology of the middle-ladder device takes into account the characteristics of both the electrical and acoustic profiles and can quickly and efficiently obtain the three-dimensional resistivity and polarization rate information of the survey area with high spatial resolution and large detection depth. In this paper, we start with the data acquisition method of the ladder-like device, and expound the working method of 3D-CT using the ladder-like device.Through a 3D geoelectric model, we use the ladder-like device to do the 3D forward modeling, Performing and imaging. The numerical simulation results show that the 3D imaging using the ladder-like device can characterize the actual electrical model well. Taking a polymetallic deposit in Gansu Province as an example, an applied research on three-dimensional high-power laser imaging technology was carried out by using the array-based electromagnetic comprehensive measurement system. The practical application shows that the 3D electromagnetism imaging technology can display the distribution of resistivity and polarizability of underground media in multi-angle and multi-detail, clarify the extended state of electrical abrupt interface and quickly delineate the favorable metallogenic area. This research has certain guiding significance in the fields of polymetallic mineral exploration.