Research on the Influence of Mining Height on the Movement Characteristics of Overlying Strata during Extremely Thick Coal Seam Fully Mechanized Sublevel Caving Mining

Table 3

Regression equations and correlation of subsidence along with mining height and initial supporting force.

or H	Dependent equation	Dependency R^2
= 8000 kN	S = −1.1286H + 16.521H − 1.5126	R^2 = 0.9983
= 12000 kN	S = −1.1128H2 + 16.085H − 4.8342	R^2 = 0.9981
= 15000 kN	S = −1.0227H2 + 14.769H − 4.0178	R^2 = 0.9994
= 18000 kN	S = −1.039H2 + 14.795H − 6.5039	R^2 = 0.9989
= 21000 kN	S = −0.9892H2 + 14.171H − 7.6101	R^2 = 0.9998
H = 3 m	S = −12.008ln + 145.99	R^2 = 0.9947
H = 4 m	S = −13.879ln + 171.99	R^2 = 0.9874
H = 5 m	S = −14.226ln + 180.52	R^2 = 0.9960
H = 6 m	S = −15.979ln + 201.37	R^2 = 0.9949
H = 7.5 m	S = −16.387ln + 206.53	R^2 = 0.9949