Table 1.

Classification of mining areas in the area of continuous deformation indicators of land deformation.

Mining Area Category	Slope T (mm/m)	Curvature Radius R (km)	Horizontal Strain ε (mm/m)
0	T ≤ 0.5	|R| ≥ 40	|ε| ≤ 0.3
I	0.5 < T ≤ 2.5	40 > |R| ≥ 20	0.3 < |ε| ≤ 1.5
II	2.5 < T ≤ 5.0	20 > |R| ≥ 12	1.5 < |ε| ≤ 3.0
III	5.0 < T ≤ 10	12 > |R| ≥ 6	3.0 < |ε| ≤ 6.0
IV	10 < T ≤ 15	6 > |R| ≥ 4	6.0 < |ε|≤ 9.0
V	15 < T	4 > |R|	9.0 < |ε|