Discussion on Advanced Seepage Reduction Characteristics of Working Face under Seepage-Damage Coupling

Figure 6

Variation of permeability coefficient at different depth in a coal seam of 8 m in thickness. (a) The depth of 100 m. (b) The depth of 200 m. (c) The depth of 300 m. (d) The depth of 400 m. (e) The depth of 500 m.

(a)

(b)

(c)

(d)

(e)