Table 4 Maximum moving deformation value of the surface.

From: Parameter design and effectiveness evaluation of wide strip mining of extra thick coal seams under dense buildings

Subsidence (mm)

Horizontal displacement (mm)

Horizontal deformation (mm/m)

Curvature (mm/m2)

Tilt (mm/m)

210

85

1.0 to − 1.4

− 8 to 20 × 10−6

1.8