Engineering Rock Mechanics

112 Intactrock

luihors

rlurrell(1963)

'airhunt (1964)

{obbs (1966)

Franklin (1971)

Bienlawski

(1974)

Yoshinaka &

Yamabe (1980)

Hoek and

Brown(1980)

Kim and Lade

(1984)

Johnston (1985)

Desai and Salami

(1987)

Michelis (1987)

The criteria

rh, = 8Toumt, or: J, = 4T011 One (3D criterion) constant

dm(2m-l)u +u,>O ui=K. Two constants

cfm(zm-~)u: +u,<o: (u, CritC"on)

Two constants

(2D criterion)

Three parameters

(W criterion)

(ZD criterion)

Three constants

(2D critenon)

u, - a, = aK(q)(u, + u2 + u,)' Three (3D critenon) parameters

'Iluee parameters

(2D criterion for

rocks and mk

masses).

or: t =A@, + 6)'.

Three parameters

(30 cnterion)

Mae than six

parameters

(3D criterion)

Four constants

In ($+ alpp+%p2) f0 = (3D critenon)

In Zqtpf, fa, ~ a3 )+In%.

Zq/pf, + a1 + a3

)evelopment of

he crirena

Wended 3D Cnffith

heory.

hpirical generalisation

pf2D Griffith theory

or intact mk.

3mpirical test data fitting

'or intact rocks

Zmpirical curve fitting

'or intact mk.

Empirical curve fitting

lor 500 rock specimens.

Empirical curve fitting

Tor 700 rock specimens.

:5 typra)

Empirical test data

analysis for soft rocks

[mudstone, etc).

Awl. of Griffth theory

and empirical curve

fitting for rock and rack

mass.

Analytical examination

on test data (originally

for soil and concrete).

Empirical curve fitting

for soft nrk specimens.

Pol ynominal expansion

in terms of mess

invariants to curve

fitting.

Analytical and

experimental

examination on yield

surface (true triaxial

test).

Figure 6.21 Summary of rock failure criteria up to 1988 (from Pan, 1989).