Property Set 1 Set 2 Set 3 Set 4 Set 5Weighted

meanPersistence 7.725 0.466 4.22 0.4 3.35 3.232Aperture 392.81 6.25 123.8 3.875 142.8 133.907

Roughness 4.5 3.666 4.8 4 4 4.193JRC 7.5 9 6.2 9 11 8.54

Primary infilling

5.75 7.333 7.5 8 6.75 7.066

Thickness 1.25 1 1.2 1.5 1.25 1.24Consistenc

y5.33 7.5 7.5 7 8 7.066

Discont.of wall

weathering1.25 1.666 1.75 2 1.75 1.682

Seepage 1 1 6.25 1.5 1 2.15UCS 123 94.5 154 130 76.5 115.6

Distance 116.375 122.433 116.12 111.8 118.55 117.05Discont.NO 172.25 187.66 173 162.5 178.5 174.78STR.tyoe 3.25 3 2.2 3 2.75 2.84

Table for weighted mean of each property

Using the rock tunneling quality index, Q

Q=RQDJn ×

JrJa×

JwSRF

RQD=Rock quality designation=100

Jn=joint set number=3

Jr=joint roughness number=4.193

Ja=joint alteration number=7.06

Jw=joint water reduction factor=2.15

SRF=stress reduction factor=115.6

Q=0.36

De=Excavation span

ESR =81=8

Using the value Q and De, we will recommend the support

That is 6) Fiber and Reinforced short Crete and bolting (0-12cm)

Using the RMR system of classification

A=UCS=115.6, rating=12

B=RQD=100%, rating==20

C=seepage=2.15, rating=10

D=Roughness=5, rating=5

E=persistence=3.232, rating=2

F=weathering=1.682, rating=5

RMR=A+B+C+D+E+F=12+20+10+5+2+5

RMR=57

It lies in the Fair rock category

And the support for it is recommended as Systematic bolts 4m long, spaced 1.5-2m with shotcrete of 50-100mm in crown and 30mm in sides