Research and Application of Prefilled Concrete Wall to Reduce the Size of Stopping Mining Coal Pillar

Figure 11

Distribution law of elastic zone and stress concentration factor.

(a) Filling body with 0 m width

(b) Filling body with 4 m width

(c) Filling body with 5 m width

(d) Filling body with 6 m width

(e) Filling body with 7 m width