Preliminary progress has been made in the investigation of the causes of local land subsidence in Balitai Town, Jinnan District. The Tianjin Municipal Party Committee and Municipal Government invited more than 20 experts from the Ministry of Natural Resources and other departments to Tianjin to guide the work.
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. It is inferred that there is a suspected geological cavity below 1300 meters depth.