黄土构造节理型地裂缝的地球物理勘探

Geophysical Exploration for Ground Fissures of Loess with Tectonic Joints

采用地球物理勘探中的地震绕射波方法、高密度电法和地质雷达3种方法对黄土构造节理型地裂缝进行了探测尝试。结果表明,这些手段对探测黄土构造节理型地裂缝是有效的,地震绕射波方法可给出地裂缝的位置、深度等参数;高密度电法方法不仅可以给出其位置,还可得到其宽度参数;而地质雷达的探测结果可给出近地表数m内地裂缝(盲沟)的高精度图像,更适合探测隐伏地裂缝。

The geophysical methods such as seismic diffraction wave exploration, multi-electrode resistive surveying and ground penetrating radar （GPR） are used to explore the ground fissures of loess with tectonic joints. The results show that the said methods are effective to the exploration. The seismic diffraction wave exploration can determine the location and depth of fissures. The multi-electrode resistive surveying can determine the width as well as the location and depth, and the GPR can give the high-accurate imaging of the fissures or ditches at several meters below the ground surface.