The Application of Integrated Geophysical Method in the Detection of Ground Subsidence Area

In the detection of a subsidence area, in order to accurately determine whether there are holes in the backfill area, the CSAMT and the transient electromagnetic method shall be selected for Integrated detection based on the geological and field conditions, and the analysis results show that the two methods of detecting results are basically identical by analyzing the abnormal characteristics of the typical sectional profile, but each has its own characteristics: The depth of CSAMT method is deeper than TEM, and the judgment of the abnormal area is relatively accurate, the resolution of TEM is better than CSAMT, but the detection depth is shallow, the depth of exploration is easily affected by the physical properties of the medium within the target depth and the shallow has a blind area. By drilling through the abnormal areas of the judgement, the results show that the detection results are accurate, and that the integrated geophysical method is accurate and effective in the collapse of backfill area.