Study on Sound Propagation Performance of Mechanized Coal Gangue-Fine Sand Filling Body

Table 7

Parameter values and correlation coefficients of each curve fitting function.

Group	Test sample	SC (%)	AA	GS	B ₁	B ₂	B ₃	B ₄	R ^2
One	1	86			−123.49	184.51	−89.84	14.58	0.99575
	2	84		3 : 7	−93.45	184.84	−113.74	22.65	0.99987
	3	82			−605.62	973.87	−519.34	92.12	0.99651
Two	4	86	3.5 : 1		−364.07	508.50	−234.85	36.14	0.99377
	5	84		5 : 5	55.15	−93.61	52.81	−9.58	0.98319
	6	82			−310.83	548.63	−320.77	62.49	0.98506
Three	7	86			45.89	−53.98	18.89	−1.37	0.99384
	8	84		7 : 3	2992.21	−4774.94	2531.56	−445.54	0.99942
	9	82			277.32	−504.94	306.34	−61.487	0.99825