Table 2 Predicted stress values and mean relative errors using GM(0, 1) in the seven mines.

From: Accurate measurement techniques and prediction approaches for the in-situ rock stress

Mine name

Depth

(m)

σH

σh

σv

MV (MPa)

PV (MPa)

MRE (%)

RMSE (MPa)

MV (MPa)

PV (MPa)

MRE (%)

RMSE (MPa)

MV (MPa)

PV (MPa)

MRE (%)

RMSE (MPa)

Sanshandao gold mine

75

6.01

4.78

9.4446

4.3963

3.81

3.46

13.5686

2.8367

2.56

2.51

6.1479

1.5941

150

7.73

7.16

5.48

4.11

4.50

4.10

420

19.27

20.04

11.05

11.50

10.88

11.49

510

24.55

24.33

16.35

13.97

14.49

13.95

555

25.71

26.48

13.00

15.20

14.00

15.18

600

28.88

28.63

14.77

16.43

16.54

16.41

645

29.57

30.77

15.48

17.67

19.56

17.64

690

31.50

32.92

17.54

18.90

19.08

18.87

750

33.22

35.78

16.68

20.54

19.60

20.51

780

30.72

37.21

26.41

21.36

18.09

21.33

795

48.93

37.93

23.15

21.77

21.66

21.74

825

46.95

39.36

28.88

22.60

26.49

22.56

960

41.63

45.80

25.42

26.29

26.79

26.25

Xincheng gold mine

205

11.45

13.79

13.6101

3.7827

4.03

7.32

29.7263

2.9218

5.69

5.11

12.1361

1.2683

235

14.62

13.41

10.17

6.80

5.63

7.30

310

18.39

17.69

11.65

8.97

10.73

9.63

410

29.62

23.40

11.98

11.87

13.77

12.73

610

30.21

34.81

13.09

17.66

17.12

18.94

660

33.35

37.66

20.08

19.10

21.46

20.50

Linglong gold mine

250

17.63

19.92

6.6579

1.8793

8.62

8.83

6.9395

1.2307

7.58

8.11

10.7058

2.1782

290

19.74

17.45

8.58

7.73

10.09

8.92

370

23.43

22.27

10.13

9.87

12.69

11.37

410

25.77

24.67

10.18

10.93

10.73

12.60

570

32.53

34.30

13.21

15.20

15.54

17.52

920

53.13

55.36

25.51

24.53

27.72

28.28

970

60.26

58.37

27.93

25.86

34.52

29.82

Pingdingshan No. 1 mine

440

19.03

17.87

11.3630

3.3447

11.40

11.89

12.4404

2.3073

12.66

13.14

13.3870

2.6388

490

18.64

19.12

14.39

12.68

15.12

12.15

652

22.39

25.44

17.65

16.87

14.20

16.17

692

30.83

27.00

12.85

17.90

14.68

17.16

633

22.06

24.70

17.63

16.38

14.99

15.69

556

19.74

21.69

16.75

14.38

14.83

13.79

555

28.13

21.65

15.26

14.36

19.06

13.76

Pingdingshan No. 10 mine

1123

65.46

59.68

10.6638

4.8401

31.26

26.47

14.2287

3.5960

38.06

39.19

21.9825

4.7441

1061

43.06

50.15

22.36

27.75

26.10

27.14

785

34.32

37.11

18.29

20.53

22.19

20.08

793

36.19

37.48

19.07

20.74

25.07

20.28

869

44.40

41.08

25.48

22.72

17.18

22.23

514

31.43

24.30

15.44

13.44

17.48

13.15

914

40.20

43.20

28.27

23.90

14.24

23.38

Meishan iron mine

210

9.46

10.30

8.4339

1.6901

4.36

4.10

13.1935

1.4656

3.04

2.24

10.8826

0.6916

218

11.47

11.63

5.61

5.71

4.80

6.08

342

20.19

18.24

7.48

8.95

9.79

9.54

350

20.32

18.67

11.79

9.16

9.57

9.76

360

16.16

19.20

7.59

9.42

10.28

10.04

418

21.50

22.30

11.56

10.94

12.32

11.66

Beiminghe iron mine

891

21.99

20.10

8.9955

2.9188

10.55

10.41

11.7173

2.8203

9.14

7.80

11.3876

1.8962

941

23.12

25.68

15.64

15.25

12.45

14.19

933

24.72

25.46

15.07

15.12

13.23

14.07

984

25.60

26.85

12.32

15.95

14.48

14.84

956

31.60

26.09

20.64

15.50

17.92

14.41

  1. MV Measured value, PV Predicted value, MRE Mean relative error, and RMSE Root mean square error.
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