直流电阻率多梯度装置研究

The Investigation of Multi-gradient Device of DC Resistivity Method

随着电磁法的流行,直流电阻率法进展缓慢,但是直流电阻率法有其先天优势,因而在找矿与环境勘查等领域继续发挥作用。装置类型是直流电阻率的特有名词,而直流电阻率法的装置研究进展缓慢。本文中的多梯度测量装置是对传统梯度装置测量方式的改进,其主要做法是将一整条长测线,不断分段,分别进行梯度测量,其与传统梯度测量装置的本质差别在于多个AB对应多个MN,AB取值的多样性使得采集到的数据信息量更丰富。通过几个地电模型在两种装置下的正反演及其分析,可以推断多梯度测量装置擅长探测地下存在多个异常体的地质情况,对处于不同深度的异常体的探测效果较好。

With the popularity of the electromagnetic method, the DC resistivity method progressed slowly. However DC resistivity method has its inherent advantages, which plays a role in prospecting mine and environment and other fields. The device of DC resistivity has its unique and the research of device makes a slow progress. This multi - gradient device is an improvement of the conventional measurement＇, whose main approach is to segment an entire line, and measure the gradient respectively. The essential difference of this device compared with the traditional one is that multiple AB corresponding multiple MN. Therefore, the diversity of AB value enriches the collection of data. Through the analysis and forward modeling and inversion of several geoelectric models of these two devices, it is inferred that multi - gradient device is good at detecting underground geological anomaly, which has a good effect on detecting the anomalies of different depth.