Study on the Migration Law of Overlying Rock in the Upward Layered Continuous Mining Face of Thick Coal Seam with Paste Backfill Mining

Figure 12

Vertical stress cloud diagram of overlying rock with different elastic moduli of backfill. (a) The elastic modulus of the filling body is 0.2 GPa. (b) The elastic modulus of the filling body is 0.4 GPa. (c) The elastic modulus of the filling body is 0.6 GPa. (d) The elastic modulus of the filling body is 0.8 GPa. (e) The elastic modulus of the filling body is 1.0 GPa.

(a)

(b)

(c)

(d)

(e)