Table 6 Target eigenvalues of the thirteen groups of experiments.

From: Mix proportion and microscopic characterization of coal-based solid waste backfill material based on response surface methodology and multi-objective decision-making

No.

Fluidity/cm

Bleeding rate/%

R3d/MPa

R7d/MPa

Cost/(RMB/t)

8

18.67

5.5

1.07

1.53

52

9

18.33

5.2

1.15

1.6

55

10

18.13

5.1

1.25

1.68

57

11

18.9

5.3

1.03

1.54

54

12

18.6

5.1

1.11

1.63

58

13

18.33

5

1.19

1.71

62

14

18.13

4.8

1.24

1.8

65

15

17.95

4.4

1.36

1.88

67

16

18.67

4.8

1.15

1.66

64

17

18.33

4.6

1.23

1.75

68

18

18.13

4.4

1.3

1.84

72

19

18

4.2

1.35

1.89

75

20

17.8

3.95

1.43

1.94

77

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