Interpretation properties of geological radar for ionized rare-earth based on model experiment

Abstract

Ionized rare-earth is a special kind of soil, which contains free ions soluble in water, and its conductivity is affected by both ion concentration and water content. Mastering the waveform properties of geological radar in this kind of soil layer under different water content conditions is helpful to improve the accuracy of post-interpretation. To obtain the interpretation properties, the model experiment was proposed. Firstly, the rectangular model box was prepared by self-made, and filled with on-site soil samples. Then, the water content of the model fill was controlled by manual configuration, and the waveform image was obtained by detecting the model fill with geological radar. Furtherly, The IDSP interpretation program was used to pre-process the waveform image, such as filtering and energy gain. The results show that when the water content is more than 30%, the electromagnetic loss is significant and the reflection intensity is sharply reduced, meanwhile the spectrum energy is concentrated with obvious low frequency, and the main frequency distribution range is 150-400MHz. The results can provide relevant reference for geological radar detection in ionized rare-earth.