Model Construction and Parameters Acquisition of the Predicted Surface Movement Deformation under Thick Loose Layer Mining Area

Figure 11

Comparison of the stability of the first 6 parameters of the hyperbolic secant model: (a) ratio factor P; (b) subsidence factor q; (c) horizontal movement factor b; (d) main influence angle tangent tanβ₁; (e) main influence angle tangent tanβ₂; (f) inflection point offset distance S₁.

(a)

(b)

(c)

(d)

(e)

(f)