refers to a geological phenomenon in which the surface rock mass or soil body falls down under the influence of natural or human activities, forming depressions, potholes or cracks on the ground.
■ Hedging measures
◆Pedestrians and vehicles should not enter or pass through the danger zone of collapse with warning signs;
◆ When it is found that there is a collapse precursor, it should immediately report to the local government or relevant departments, and notify other threatened people to evacuate as soon as possible;
◆When you are in a subsidence area and feel the ground changes, you should immediately flee to the surrounding stable area with the fastest speed;
◆ When receiving warning information or encountering warning signs, do not enter the collapse danger zone.