Study on Filling Material Ratio and Filling Effect: Taking Coarse Fly Ash and Coal Gangue as the Main Filling Component

Table 4

Range analysis of compressive strength of the paste filling material specimen.

Index	8 h UCS (MPa)			1 d UCS (MPa)			3 d UCS (MPa)			7 d UCS (MPa)			28 d UCS (MPa)
	A	B	C	A	B	C	A	B	C	A	B	C	A	B	C
k1	0.21	0.19	0.17	0.41	0.40	0.36	1.25	1.16	1.14	2.34	2.11	2.17	3.72	3.45	3.60
k2	0.24	0.19	0.19	0.43	0.41	0.39	1.20	1.19	1.17	2.41	2.16	2.20	4.10	3.48	3.59
k3	0.21	0.21	0.21	0.41	0.40	0.40	1.21	1.18	1.19	2.39	2.20	2.23	3.99	3.65	3.60
k4	0.18	0.21	0.22	0.40	0.40	0.43	1.20	1.21	1.21	1.98	2.24	2.19	3.50	3.72	3.57
k5	0.16	0.20	0.22	0.34	0.41	0.44	1.08	1.21	1.23	1.84	2.26	2.18	2.69	3.73	3.65
	0.20			0.40			1.19			2.19			3.60
R	0.08	0.02	0.05	0.09	0.01	0.08	0.17	0.05	0.09	0.57	0.15	0.06	1.41	0.28	0.08
Sparkline-A
Sparkline-B
Sparkline-C
PSF	A	C	B	A	C	B	A	C	B	A	B	C	A	B	C

 = average uniaxial compressive strength, MPa.