Sr. No.

Chainage (m)

Q-value for roof

Q-value for wall

Joint roughness number for crown & wall

Joint alteration number for crown & wall

Ultimate roof support pressure (kg/cm2)

Ultimate wall support pressure (kg/cm2)

Friction Angle

1

0 - 5

10.22

51.10

1.0

1.0

0.922

0.539

1.0

45

2

5 - 10, 200 - 205

16.33

81.65

1.0

1.0

0.789

0.461

1.0

45

3

10 - 20

12.25

61.25

1.0

2.0

0.868

0.508

0.5

27

4

20 - 30, 65 - 70, 75 - 80, 130 - 135, 160 - 165, 210 - 220

7.92

19.80

1.0

2.0

1.004

0.740

0.5

27

5

30 - 35, 50 - 55

15.33

76.65

1.0

1.0

0.805

0.471

1.0

45

6

35 - 40

14.67

73.35

1.0

1.0

0.817

0.478

1.0

45

7

40 - 45, 195 - 200, 205 - 210

15.83

79.15

1.0

1.0

0.797

0.466

1.0

45

8

45 - 50

11.88

59.40

1.0

2.0

0.877

0.513

0.5

27

9

55 - 60

10.89

54.45

1.0

1.0

0.903

0.528

1.0

45

10

60 - 65

12.38

61.90

1.0

2.0

0.865

0.506

0.5

27

11

70 - 75, 80 - 85

7.67

19.17

1.0

2.0

1.014

0.748

0.5

27

12

85 - 90

4.89

12.22

1.0

2.0

1.178

0.869

0.5

27

13

90 - 95, 155 - 160

165 - 175, 185 - 195

7.33

18.32

1.0

2.0

1.030

0.759

0.5

27

14

95 - 100

4.72

11.80

1.0

2.0

1.192

0.879

0.5

27

15

100 - 105, 125 - 130, 175 - 180

6.83

17.07

1.0

2.0

1.054

0.777

0.5

27

16

105 - 110

12.50

62.50

1.0

1.0

0.862

0.504

1.0

45

17

110 - 115

13.67

68.35

1.0

1.0

0.837

0.489

1.0

45

18

115 - 120

14.17

70.85

1.0

1.0

0.827

0.484

1.0

45

19

120 - 125

10.56

52.80

1.0

1.0

0.912

0.533

1.0

45

20

135 - 155

4.56

11.40

1.0

2.0

1.206

0.889

0.5

27

21

180 - 185

4.17

10.42

1.0

2.0

1.243

0.916

0.5

27