Study on Sound Propagation Performance of Mechanized Coal Gangue-Fine Sand Filling Body

Figure 6

The relationship between the slurry concentration (SC) and the wave speed of the backfill specimen: (a) (GS) 3 : 7, (b) (GS) 5 : 5, and (c) (GS) 7 : 3.

(a)

(b)

(c)