Table 1 Sample data28,29.

From: Prediction model of spontaneous combustion risk of extraction borehole based on PSO-BPNN and its application

NO

O2/%

N2/%

CO/ppm

CH4/%

CO2/%

C2H4/ppm

C2H6/ppm

C2H4/C2H6

CO2/CO

Level

1

20.35

79.58

1.54

0.05

0.011

0

0

0

7.14

1

2

20.4

79.47

3.21

0.02

0.01

0

0

0

3.12

1

3

20.19

79.65

9.73

0.12

0.017

0

0

0

1.75

1

4

20.57

79.35

5.38

0.07

0.014

0

0

0

2.6

1

5

20.31

79.51

5.59

0.15

0.022

0

0

0

3.94

1

6

17.46

80.77

37.01

1.73

0.051

1.55

0

0

1.38

2

7

15.2

80.86

31.31

3.89

0.057

1.42

0

0

1.83

2

8

14.23

80.42

41.74

5.28

0.073

0.85

0.21

4.05

1.75

2

9

17.21

81.37

14.13

1.39

0.039

3.03

0.94

3.22

2.76

2

10

14.16

79.93

22.58

5.91

0.027

3.74

0.57

6.52

1.2

2

11

15.34

79.3

134.54

5.28

0.087

7.15

4.56

1.57

0.65

3

12

12.55

79.6

182.66

7.76

0.088

8.05

5.73

1.4

0.48

3

13

14.81

80.07

142.5

5.03

0.09

6.42

4.65

1.41

0.63

3

14

12.25

78.2

193.83

9.47

0.077

8.12

4.04

2.01

0.4

3

15

16.77

80.26

45.27

2.92

0.056

4.28

3.92

1.09

1.21

2

16

12.73

81.02

52.5

6.18

0.074

3.12

1.82

1.71

1.41

2

17

14.42

80.63

57.16

4.88

0.068

3.93

7.44

0.53

1.19

2

18

13.34

78.64

53.87

7.95

0.073

4.07

2.12

1.92

1.36

2

19

10.6

80.24

43.08

9.1

0.029

5.17

3.36

1.54

0.67

2

20

14.61

79.81

46.24

5.6

0.048

2.45

1.07

2.29

1.04

2

21

8.22

79.42

54.3

12.3

0.066

3.63

1.69

2.15

1.22

2

22

20.09

79.66

10.29

0.23

0.025

0

0

0

2.43

1

23

20.45

79.23

14.18

0.32

0.023

0

0

0

1.62

1

24

20.34

79.27

4.89

0.37

0.012

0

0

0

2.45

1

25

19.47

79.36

6.59

1.14

0.03

0

0

0

4.55

1

26

18.22

80

13.25

1.75

0.028

0

0

0

2.11

1

27

12.68

79.47

202.65

7.75

0.091

8.44

6.59

1.28

0.45

3

28

11.97

79.67

170.2

8.3

0.059

17.94

16.25

1.1

0.35

3

29

14.13

81.73

165.77

4.14

0.064

8

13.12

0.61

0.39

3

30

11.18

80.66

248.15

8.09

0.068

12.78

6.55

1.95

0.27

3

31

20.06

79.38

17.04

0.56

0.033

0

0

0

1.94

1

32

17.47

80.97

15.87

1.56

0.021

0

0

0

1.32

1

33

20.08

78.98

7.77

0.92

0.016

0

0

0

2.06

1

34

19.9

79.32

2.93

0.63

0.015

0

0

0

5.12

1

35

20.26

78.86

6.08

0.87

0.017

0

0

0

2.8

1

36

19.87

79.18

18.47

0.91

0.052

0

0

0

2.82

1

37

16.91

80.16

15.2

2.87

0.068

0

0

0

3.42

1

38

12.01

80.28

47.95

7.63

0.085

2.67

1.05

2.54

1.77

2

39

13.82

80.17

210.48

5.94

0.062

13.16

16.81

0.78

0.29

3

40

19.06

79.73

5.66

1.21

0.024

0

0

0

4.24

1

41

9.36

78.96

258.71

11.6

0.085

12.62

14.93

0.85

0.33

3

42

13.35

79.54

230.13

7.01

0.092

9.46

7.63

1.24

0.4

3

43

15.19

80.45

33.69

4.32

0.044

0.31

0

0

1.31

2

44

18

80.54

11.63

1.41

0.042

0

0

0

3.61

1

45

10.52

81.97

75.52

7.45

0.063

3.55

5.87

0.6

0.83

2

46

20.62

78.81

8.58

0.55

0.02

0

0

0

2.33

1

47

19.89

79.05

4.81

1.06

0.036

0

0

0

7.48

1

48

11.33

79.76

108.15

8.82

0.086

14.75

11.74

1.26

0.8

3

49

11.9

78.86

43.59

9.21

0.035

4.76

2.85

1.67

0.8

2

50

16.71

81.09

19.34

2.12

0.078

0

0

0

4.03

1

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