A circular tunnel with four fractures in its wall in an infinite rock mass is subjected to internal hydraulic pressure of 50MPa. The in situ stresses (far-field stresses) in the rock mass are Pxx=Pyy=10MPa. The inclination of the fractures is 45°. The material properties of the rock mass and fractures are the same as in Examples 1 and 3.
The fractures are found to propagate in mode I in radial direction.
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TITLE
A tunnel with four fractures subjected to internal hydraulic pressure
SYMMETRY -- Model symmetry
4 0.00 0.00
MODULUS - Poisson's Ratio and Young's modulus
0.25 0.40E+11
TOUGHNESS -- Gic and Giic
50. 1000.
PROPERIES -- mat, kn. ks,phi,coh
1 0.10E+13 0.10E+13 30.0 0.00E+00
SWINDOW -- xll,xur,yll,yur,numx,numy
-4.00 4.00 -4.00 4.00 30 30
STRESSES -- sxx,syy,sxy
-10.0E+06 -10.00E+06 0.00E+00
FRACTURE -- nume,xbeg,ybeg,xend,yend,kode,mat
3 0.700 0.700 1.000 1.000 2 1
ARCH -- nume,xcen,ycen,diam,ang1,ang2,kode,ss,sn
10 0.0 0.0 2.0 0.0 90.0 1 0.00E+00 -50.E+06
CYCL 1000
ENDFILE
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