Fracture Propagation and Hydraulic Properties of a Coal Floor Subjected to Thick-Seam Longwalling above a Highly Confined Aquifer

Figure 7

Comparison of volumetric strain obtained by physical modelling and numerical modelling in different advancing distances: (a) workface advances 36 m; (b) workface advances 72 m; (c) workface advances 144 m.

(a)

(b)

(c)