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

Figure 3

Floor fracturing profile with workface advancing: (a) workface advances 36 m; (b) workface advances 66 m; (c) workface advances 102 m; (d) workface advances 186 m.

(a)

(b)

(c)

(d)