Parameters

Marble

Ultrabasite

Andesite

Rc (MPa)

100 - 250

50 - 100

50 - 100

A1

12

7

7

RQD

97

94

12

A2

20

20

3

Spacing (mm)

600 - 2000

600 - 2000

200 - 600

A3

15

15

10

Nature of discontinuity

l.i, 1 - 5 mm, r.d, e.r, l.a.

l < 1 m, e.cn.r, t.r, t.a,

l.i, >5 mm, r.d, e.l.r, t.a,

A4

9

25

6

Water contain

Dry

Dry

Dry

Debiting

Debiting

Debiting

A5

15

15

15

RMR (∑A)dry

71

82

41

Qualitydry

Good

Very Good

Fair

RMRdebiting

56

67

26