Study on Dynamic Mechanical Properties of Full Tailings Cemented Backfilling Impacted by Cement-Sand Ratio

Table 1

Physical and mechanics parameters of specimen.

Group	Cement-sand ratio	Size (mm)	Density (%)	Average density (kg·m^−3)	Elasticity moduli (MPa)	Wave velocity (m·s^−1)	Compressive strength (MPa)	Maximum strain	Wave impedance (kg·m^−2·s^−1)
A	1 : 4	Ф50 × 25	72	1553	203.46	997	2.73	0.055	1.55 × 10^6
B	1 : 6	Ф50 × 25	72	1592	164.25	850	2.14	0.034	1.35 × 10^6
C	1 : 8	Ф50 × 25	72	1627	139.63	783	1.38	0.009	1.27 × 10^6