Acoustic Emission and Ultrasonic Characteristics in the Failure Process of Cemented Waste Concrete-Coal Gangue Backfilling (CWCGB) under Uniaxial Loading

Table 3

Mixing ratio of the CGB and CWCGB.

Serial number	Cement	Fly ash	Coarse gangue	Fine gangue	Fine waste gangue	Water
X1	1	2	3.5	1.50	0	2
X2	1	2	3.5	1.05	0.45	2
X3	1	2	3.5	0.75	0.75	2