Risk Assessment and Prevention of Surface Subsidence under Buildings by Cemented Paste Filling and Strip Mining Methods: A Case Study

Table 1

Classification of damage to surface brick-concrete structures [16].

Damage level	Surface deformations	Curvatures (mm/m^2)	Inclinations (mm/m)	Classification	Structural processing
	Horizontal deformation (mm/m)
I	≤2.0	≤0.2	≤3.0	Negligible damage	No repair
				Very slight damage	Light repair
II	≤4.0	≤0.4	≤6.0	Slight damage	Minor repair
III	≤6.0	≤0.6	≤10.0	Medium damage	Medium repair
IV	>6.0	>0.6	>10.0	Severe damage	Heavy repair
				Very severe damage	Demolition and construction