Mechanism by Which Backfill Body Reduces Amount of Energy Released in Deep Coal Mining

Figure 7

Distribution of strain energy density at different advancing distances when using caving mining method. (a) Working face advanced to 48 m. (b) Working face advanced to 72 m. (c) Working face advanced to 112 m. (d) Working face advanced to 200 m.

(a)

(b)

(c)

(d)