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本文简要介绍EH-4电磁成像系统的基本原理与工作方法,论证了该方法在探测堆积体方面的有效性,阐明了该系统对高阻厚层和低阻薄层勘察的相对灵敏性。然后对云南古水水电站三个堆积体的电性特征及EH-4电磁成像系统勘查的有效性进行了分析,并对观测数据进行了处理和研究,展示了该方法在探测堆积体规模、厚度、形态和与基岩界面方面的应用成果,最终得出了一些有意义的结论,供同类工程参考。
This paper briefly introduces the basic principle and working method of EH-4 electromagnetic imaging system. The effectiveness of the method in detecting stacks is demonstrated. The relative sensitivity of the system to the investigation of high resistivity and low resistivity laminae is demonstrated. Then the electrical characteristics of the three accumulations of the Gushui Hydropower Station in Yunnan Province and the validity of the EH-4 electromagnetic imaging system are analyzed. The observed data are processed and studied. The results show that this method is effective in detecting the size, thickness , Morphology and application results of the interface with bedrock, finally made some meaningful conclusions for the reference of similar projects.