Experimental Research on Material and Mechanical Properties of Rock-Like Filling Materials in Disaster Prevention of Underground Engineering

Table 2

Optimization scheme of filling material ratio.

Test scheme	Indicator	Optimal combination of factor levels	Description of preferred ratio combination
E1	D1	A (a), B (A), C (b)	Cement content 9%, ash gangue ratio 5 : 2, mass concentration 63%
E2	D2	A (c), B (b), C (a)	Cement content 16%, ash gangue ratio 1 : 1, mass concentration 74%
E3	D3	A (b), B (c), C (a)	Cement content 9%, ash gangue ratio 2 : 5, mass concentration 74%
E4	D4	A (c), B (c), C (c)	Cement content 16%, ash gangue ratio 2 : 5, mass concentration 68%
E5	D5	A (c), B (c), C (a)	Cement content 16%, ash gangue ratio 2 : 5, mass concentration 74%