Xikuang is a newly-built prison coal mine and a place to reform criminals. Located in the swamp river network area of Laotai Township, Yutai County, the groundwater level is -0.25 ~-2.0m, and the surface layer is 1 ~ 8m, all of which are relatively weak foundations with an average bearing capacity of about 1 10 kPa. Moreover, in some places, there are ancient tombs, underground ditches, potholes and complicated geological conditions. There are many prisons in the mine, such as fences, watchtowers, prison buildings and so on! ! !