Effects of Corn Stalk Fly Ash (CSFA) on the Mechanical and Deformation Properties of Cemented Coal Gangue Backfill

Table 3

Mix proportions (kg/m³) of coal gangue backfilling materials.

Specimen	Substitution rate (wt%)	Fine gangue (0–5 mm)	Coarse gangue (5–15 mm)	Cement	Fly ash	CSFA	Water
C0	0	285	665	190	380	0	311.325
C1	10	285	665	171	380	19	311.325
C2	20	285	665	152	380	38	311.325
C3	30	285	665	133	380	57	311.325
C4	40	285	665	114	380	76	311.325