Preliminary progress has been made in the investigation of the causes of local land subsidence in Balitai Town, Jinnan District. It is inferred that there is a suspected geological cavity below 1300 meters depth, which is not detectable by conventional survey means.
It cannot be ruled out that the construction of geothermal wells touched deep geological structures, resulting in shallow soil erosion and land subsiding in the area involved. The area is currently in a balanced recovery period, and although there are still a few changes, it is generally controllable.