. , 3/5/2004 2-1 2 2. 2.1 . ( ) (). ('), - ., . . 2.2 , (v h ) :
o vu h = , v o hK = :h = = uo = = 23-26kN/m3. :d uw o = (w)
(10kN/m3)(d).,() 0.4-1.0 . , : = 0.6-1.0. :=0.4-0.7. (4 ) ( = 0-0.3
). (400-500) (=1),,(100-400m) . (, . , 3/5/2004 2-2 ,) (). () . :
1. . 2. . 3. (overcoring). , : 1. . . 2. , . 3. (.. ) . 2.3 :
ERMRci= 1001040alog (1) ci(MPa)(),
RMRBieniawski(RockMassRating)GSI(Geological StrengthIndex)GPa.
Hoek(1997) Serafim and Pereira (1983). Poisson : Poisson 0.20-0.25
0.30-0.35 , 0.35-0.40 0.30-0.35 0.25-0.30 2.4 Mohr Mohr-Coulomb( ).
. , 3/5/2004 2-3Hoek-Brown .Hoek-Brown : 1 33= + +ci bcim s (2) :1,
3 = ci = ( ) mb, s, = (ci) Hoek-Brown., (ci) 1 2. (mb, s, ) : m
mRMRb i= exp10028(3) RMR > 25:sRMR= exp1009, = 0.50(3) RMR <
25:s = 0 , = 0 65200.RMR(3) (mi) 3.,RMR GSI ( RMR < 40 RMR ).
Hoek-Brown(2) (c = 1 3 = 0) : c cis = (4) : RMR GSIc / ci 800.329
700.189 600.108 500.062 400.036 300.020 20- 10- . Hoek-Brown . ,
Hoek (1999) : . , 3/5/2004 2-4 =20exp 019 . 0GSIci c (4) , c / ci =
0.085 GSI = 30, (4) : c / ci = 0.02. ,(2) (t = -3 1 = 0): [ ]tcib
bm s m = + 242(5) - ( RMR > 25). - Hoek-BrownMohr-Coulomb. , (c,
) Mohr-Coulomb Hoek-Brown. ( Hoek-BrownMohr-Coulomb) Hoek-Brown.
(c, ) Hoek-Brown( 3): 1. : 1 33= + +ci bcim s (1). 2. : 13311+ + =
=s m m kcib b ( )3 1 = k . 3. : kka++=13 1 ( )( )kkka+= =13 13 ()
() . 4. () (c) : tan =+121 3aa 11sin+=kkca a= tan5. ,() (1) :
kaa==3tan . , 3/5/2004 2-52.5 , : 1.(.. ) . 2. (.. ). ( RMR)( ). ,
(k) .( -)k=0.10, 10% () . , , () 2%,2.2%,2.4% 2.6%. , . : ( ) [ ]oe
t eoe tt t k t t k / log 1 ) / log( + = + = k, t (t), e (), (to) .
12 t1 t2 t2=10xt1, : ek = 1 2, (k) . , ( 1). , eoE / ( to) / E (t),
: ( )oot t kE E/ log 11+=,n- (ont t =10 ), to=1.2 (n = 1 1 , n = 2
10 n = 3 100 ) : . , 3/5/2004 2-6 nkE Eo+=11 : / k1 10 100
0.020.9800.9610.943 0.050.9520.9090.870 0.100.9090.8330.769
0.150.8700.7690.690 30% .
HoekE.(1999)"Supportforveryweakrockassociatedwithfaultsandshearzones"Proc.
Intern. Symp. on Rock Support and Reinforcement Practice in Mining,
Kalgoorlie, Australia, March 1999.
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