Investigation on Mining-Induced Floor Water Inrush from Column and Its Control Based on Microseismic Monitoring

Figure 5

The damage zone evolution of floor strata during mining. (a) The mining thickness is 2 m; (b) the mining thickness is 4 m; (c) the mining thickness is 6 m; and (d) the mining thickness is 8 m.

(a)

(b)

(c)

(d)