Fig. 3

Stress-strain curves of backfill at different mass concentrations. (a) T = 3 days, (b) T = 7 days, (c) T = 14 days, (d) T = 28 days.

Stress-strain curves of backfill at different mass concentrations. (a) T = 3 days, (b) T = 7 days, (c) T = 14 days, (d) T = 28 days.