Control of Water Inrush from Longwall Floor Aquifers Using a Division Paste Backfilling Method

Figure 7

Numerical simulation of the plastic zone of 28 d strength of the different paste: (a) 3 MPa, (b) 4 MPa, (c) 5 MPa, and (d) 7 MPa.

(a)

(b)

(c)

(d)