Surface Movement and Deformation Law Caused by Different Coal Pillar Stagger Distances in Strip Filling IoT-Enabled Sustainable Mining

Table 2

Surface movement value of strip filling mining in multiseam with different coal pillar normal direction staggers (α = 10°, q = W_max/Mcosα, b = U_max/W_max).

Coal pillar stagger coefficient	Maximum subsidence Wmax (mm)	Subsidence ratio q	Maximum horizontal movement Umax (mm)	Horizontal movement coefficient b
s = 0	2066	0.210	187	0.09
s = 0.25	2371	0.241	238	0.10
s = 0.50	2745	0.279	245	0.09
s = 0.75	3041	0.309	247	0.08
s = 1	3149	0.320	255	0.08