PERMFILE111229

• Permit No: M1988112
• IBM Index Class Name: Permit File
• Doc Date: 3/2/1989
• Section_Exhibit Name: APPENDIX I FIELD INVESTIGATION MAPPING LOGGING WEAK ROCK MASS ASSESSMENT
• Media Type: D
• Archive: No

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Table 1 - APPROXIi4ATE CLASSiFiC,~TiOil OF LOHE~i'/E SOIL A~0 ROC:<
Ao. Daee~~c:on Um~.aL
2 ccmpreaeioa strength
i~-eoL
Z3/in kg/cn= ,mss as
51 VERY SOFT SOIL - easily moulded
with fingers, shows distinct <$ <0.4 [0.04
heel marks.
SZ SOFT SOIL - moulds with strong
pressure from fingers, shows 5-10 0.4-0.8 0.04-0.08
fain[ heel marks.
S3 FIRM SOIL - very difficult Co
mould with fingers, indented 10-20 0.8-1.5 0.08-o.t5
with finger nail, difficult co
cut with hand spade.
54 STIFF SOIL - canna[ be moulded
with fingers, canna[ Se cut 20-d0 I.j-5.0 0.15-0.50
with hang space, requires hand
picking for excava ciao .
$j VERY STIFF SOIL - very tough ,
difficult to move with hand 80-150 6-10 0.5-1.0
pick, pneumatic spade required
for excavation.
R1 '/ERY 'TEAK .RO C:< - crumples under
snaro Slaws with geological 150-3500 10-250 1-25 Chalk, rocksalt
pick point. Can be cut with
packet knife.
R2 MODERATELY LEAK ROCK - shallow
cuts pr scraping with pocket
'toile with difficulty. pick
3500-7500
250-100
25-50 Ccal, schist, s~Its tone
i
paint indents deeply with firm
hlow.
R3 NOOERATELY STRONG ROCK - knife
cannot be used to scrape or 7500-
peel surface, shallow indenta-

Clans uncer firm 61ow from pick 15000
point.
R4 STRONG ROCK - hand-held sample

breaks with one firm blow frpm 15000-
30000
hammer end of geological pick.
R5 VERY STRONG ROCK - requires
many blows from geological pick > 30000
to break intact sample.
500-1000 50-100 ~ Sandstone, slate, shale
1000-2000 100-200 ~ Marble, granite, gneiss
> 2000 > 200
Quartzite, doler'Ce,
gapbrp, basalt