Table 2 Maximum jetting velocity and geyser height under different conditions.

From: Experimental investigation on the hazard of geyser created by an entrapped air release in baffle-drop shafts

Serial number

hw*

pi*

Vi*

vgm (m/s)

hg (m)

R (× 105)

W0.5

Serial number

hw*

pi*

Vi*

vgm (m/s)

hg (m)

R (× 105)

W0.5

1

0.167

4.000

0.026

9.023

1.84

17.0

472.9

13

0.250

2.000

0.052

9.886

2.23

28.0

634.6

2

0.250

3.500

0.026

8.534

1.65

24.2

547.8

14

0.250

2.500

0.052

10.807

2.67

30.6

693.7

3

0.250

4.000

0.026

9.146

2.05

25.9

587.1

15

0.250

3.000

0.052

11.574

3.03

32.8

743.0

4

0.333

3.000

0.026

8.703

1.74

32.8

645.1

16

0.250

1.000

0.078

8.369

1.56

23.7

537.2

5

0.333

3.500

0.026

9.839

2.20

37.1

729.3

17

0.250

1.500

0.078

10.117

2.34

28.6

649.5

6

0.333

4.000

0.026

10.487

2.47

39.6

777.3

18

0.250

2.000

0.078

10.958

2.69

31.0

703.4

7

0.417

2.000

0.026

7.535

1.33

35.5

624.5

19

0.167

3.500

0.026

Critical condition

8

0.417

2.500

0.026

8.245

1.54

38.9

683.3

20

0.250

3.000

0.026

9

0.417

3.000

0.026

8.827

1.79

41.6

731.5

21

0.333

2.500

0.026

10

0.417

3.500

0.026

10.303

2.42

48.6

853.9

22

0.417

1.500

0.026

11

0.417

4.000

0.026

11.347

2.81

53.5

940.4

23

0.250

1.000

0.052

12

0.250

1.500

0.052

8.355

1.57

23.6

536.3

24

0.250

0.500

0.078