Natural sinkholes generally form when heavy, water-saturated soil causes the roof of an underground limestone cavity to collapse, or when water widens a natural fracture in limestone bedrock.

This article analyzed in brief the cause, which triggered the collapse of wall rocks during the cavity construction, the prevention measure and general principle of treatment.

The study results show that the activity of underground water plays a key role in the whole process from the cavity formation to the occurrence of ground collapse.