FLAC and numerical modeling in geomechanics : proceedings of the third International FLAC Symposium, 21-24 October 2003, Sudbury, Ontario, Canada

Constitutive models......Page 9
2.2 Excavation sequence......Page 10
2.3 Material properties......Page 11
2.4 Simulation of the compensation grouting......Page 12
3.3 Calculation of volume loss......Page 14
REFERENCES......Page 15
2 CONCEPTUAL MODEL......Page 16
4 DESCRIPTION OF THE PROCEDURE......Page 17
5 COMMENTS......Page 18
6 SAMPLE PROBLEM......Page 19
REFERENCES......Page 22
2 GENERAL FORMULATION......Page 23
3.4 Composite flow rule......Page 25
4 IMPLEMENTATION......Page 26
7 CONCLUDING REMARKS......Page 29
APPENDIX A. CLOSED-FORM SOLUTION FOR A CYLINDRICAL HOLE IN AN INFINITE BRITTLE HOEK-BROWN MEDIUM......Page 30
2 EXISTENCE CRITERIA FOR COMPACTION BAND......Page 32
2.1 Cap constitutive relations......Page 33
2.2 Condition for localization......Page 34
3 NUMERICAL EXPERIMENTS......Page 35
ACKNOWLEDGEMENTS......Page 37
APPENDIX A: DATA FILE......Page 38
2 THE MINE-BY TEST EXPERIMENT......Page 39
2.2 Laboratory tests......Page 40
3.1 General principles......Page 41
3.2 Identification of parameters......Page 42
4 SIMULATION OF THE GALLERY......Page 43
4.2 Evolution of the damage in time......Page 44
4.3 Evolution of the permeability in time......Page 46
REFERENCES......Page 47
2 DESCRIPTION OF THE MODEL......Page 48
2.1.3 Deviatoric plastic mechanism......Page 49
2.2 Viscous hardening with a bounding surface......Page 50
3.3 Plane strain calculations......Page 52
3.4 Axisymmetric calculation......Page 53
ACKNOWLEDGEMENTS......Page 55
REFERENCES......Page 56
1.2 Characterization of the swelling behavior......Page 57
2 ANHYDRITE SWELLING LAW......Page 58
3 FINITE DIFFERENCES CALCULATION ALGORITHM......Page 59
4.3 Huder-Amberg swelling test in plasticity......Page 61
4.4 Combined swelling pressure and swelling strain test......Page 62
REFERENCES......Page 64
2.1 Simple and complex model generation......Page 65
2.2 The 3DMACS software suite......Page 66
3.1 Model setup, properties and boundary conditions......Page 67
3.2.2 Volume strain......Page 68
3.2.4 Dip and strike of fault......Page 69
5 CONCLUSIONS......Page 70
ACKNOWLEDGEMENTS......Page 72
1 INTRODUCTION......Page 73
2.2 Constitutive equations......Page 74
2.4 Verification and validation......Page 75
2.5 Application to a circular opening......Page 76
3.2 Definition of hydromechanical problem......Page 78
3.3 Comparison with the semi-analytical solution......Page 80
4 CONCLUSION......Page 81
REFERENCES......Page 82
Slope stability......Page 83
2 METHODS APPLIED IN THE STUDY......Page 84
2.3.1 Safety factor calculations in FLAC3D......Page 85
3 NUMERICAL MODEL STUDIES AND PARAMETRIC ANALYSIS......Page 86
4 RESULTS......Page 87
5 CONCLUSIONS......Page 88
REFERENCES......Page 90
2 CENTRIFUGE MODEL......Page 91
3 CONSTITUTIVE MODEL......Page 92
4 FLAC MODEL BEHAVIOR......Page 94
5 CONCLUSION......Page 96
REFERENCES......Page 97
2 STABILITY OF SLOPE WITH WEAK STRATUM......Page 98
3.1 Benched slope stability case......Page 99
3.2 Large scale, complex geology slope stability case......Page 100
REFERENCES......Page 101
3 SETTING OF MATERIAL PROPERTIES......Page 102
5.3.1 Hydraulic boundary conditions......Page 103
7 PARAMETRIC STUDY OF THE 3D MODEL DURING CONSTRUCTION......Page 104
7.3 Stresses......Page 105
8.2 Stresses......Page 106
REFERENCES......Page 107
2 COMPARISON OF THE L-E AND S-R FRAMEWORKS......Page 108
3 STRENGTH FUNCTIONS FOR A GIVEN STATE OF INFORMATION......Page 109
5 EFFECT OF MASH GEOMETRY ON RESULTS OF THE S-R TECHNIQUE......Page 110
6 FAILURE MODES IMPLIED BY FLAC’S S-R TECHNIQUE......Page 111
7 THE CRITICAL HEIGHT FUNCTION......Page 113
8 SUMMARY AND CONCLUSIONS......Page 114
REFERENCES......Page 115
2 SITE GEOLOGY......Page 116
4 NUMERICAL MODELING WITH FLAC......Page 117
4.1 Preliminary analysis......Page 118
4.3 Rock-mass properties......Page 119
REFERENCES......Page 121
APPENDIX ? FISH ROUTINE......Page 122
Underground cavity design......Page 123
2.2 Rock mass properties......Page 124
3.1 Evaluation of models in terms of displacements......Page 125
3.2 Evaluation of models in terms of stresses......Page 129
4 CONCLUSIONS......Page 130
REFERENCES......Page 131
1 INTRODUCTION......Page 132
3.1 Ground mass......Page 133
3.3 Simulation of excavation......Page 134
5.1 Surface settlements......Page 135
6.2 Numerical model coupling soil and structure......Page 136
7.2 Induced forces in the structure columns......Page 137
8.2 Influence of volume loss on induced forces in columns......Page 139
REFERENCES......Page 140
2 HLW REPOSITORY CONCEPT IN KOREA......Page 142
3.1.2 Buffer and backfill......Page 143
3.2 Modeling method......Page 144
3.4 Decay heat......Page 145
4.2 Displacement......Page 146
5 CONCLUSIONS......Page 147
REFERENCES......Page 148
2.1 The new TGV southeast high speed railway line and the Tartaiguille tunnel......Page 150
2.3 Results of the measurements......Page 151
3.1 The constitutive model......Page 152
3.3 Behavior of the tunnel with initial support......Page 153
3.5 Effect of a local failure of the shotcrete lining......Page 155
4 CONCLUSIONS......Page 156
REFERENCES......Page 157
2 NUMERICAL ANALYSIS......Page 158
2.2 Non-linear elastic analyses......Page 160
2.3 Anisotropic soil model......Page 161
4 CONCLUSIONS......Page 163
REFERENCES......Page 164
2.3 Initial conditions......Page 165
2.4 Modeling sequence......Page 166
4 RESULTS AND DISCUSSIONS......Page 168
5 CONCLUSIONS......Page 172
REFERENCES......Page 174
Mining applications......Page 175
2.1 Niobec mine......Page 176
3.1 Model geometry......Page 177
3.2 Boundary conditions......Page 178
4.1 Mining sequence......Page 179
4.3 Design of the third horizontal pillar......Page 180
REFERENCES......Page 182
2.1 FLAC model geometry......Page 183
2.3 Constitutive models and material properties......Page 184
2.6 Interface between rock and fill......Page 185
3 INTERPRETATION OF ANALYSES......Page 186
4 SUMMARY OF RESULTS......Page 187
5 CONCLUSIONS......Page 189
1 INTRODUCTION AND BACKGROUND......Page 190
2 GENERAL APPROACH......Page 191
3.2 Case 2 ? flat back drift, with loose waste material on both sides......Page 192
3.3 Case 3 ? arched back drift, with no loose waste material on the sides......Page 194
3.4 Case 4 ? arched back drift with no loose waste material on the sides, but with a horizontal discontinuity in the paste fill above it......Page 195
4 GENERAL OBSERVATIONS DURING THE FIELD WORK......Page 196
ACKNOWLEDGEMENTS......Page 197
2 MINE LAYOUT AND GEOLOGY......Page 198
3 EVENT......Page 199
5 RESULTS......Page 200
ACKNOWLEDGEMENTS......Page 203
1 INTRODUCTION......Page 204
2 ARCHING EFFECTS......Page 205
3.1 Vertical stope......Page 206
3.2 Inclined stope......Page 208
4.2 Marston theory limitations......Page 209
4.3 Constitutive behavior......Page 210
REFERENCES......Page 211
2 MINE GEOMETRY......Page 213
3.1.2 Ore lens interactions......Page 214
3.2 High resolution mining method analysis......Page 215
3.2.1 Results......Page 216
4.1 Shaft model......Page 219
4.2 Generic large excavation model......Page 221
REFERENCES......Page 223
1 INTRODUCTION......Page 224
2.1 Determination of material properties......Page 225
2.2 Gob compaction......Page 227
3 RESULTS......Page 228
ACKNOWLEDGMENT......Page 229
REFERENCES......Page 230
1 GENERAL INSTRUCTIONS......Page 231
2 GENERATION OF THE ELEMENTS FOR A FLAC3D MODEL......Page 232
4 FURTHER APPLICATION OF CUSTOMISED FISH FUNCTIONS AT THE FALCONBRIDGE THAYER LINDSLEY MINE......Page 233
APPENDIX I ? FISH FUNCTION FOR THE GENERATION OF THE ELEMENTS OF A FLAC3D MODEL......Page 234
APPENDIX II ? FISH FUNCTION FOR THE CREATION OF A LONGITUDINAL SECTION IN THE CENTRE OF THE UNDULATING ORE ZONE......Page 237
Soil structure interaction......Page 238
1 BACKGROUND......Page 239
2 PHYSICAL TEST MODELS......Page 240
3.2.1 Soil......Page 241
3.2.3 Interfaces......Page 242
4.1.1 Facing displacements......Page 243
4.1.2 Reinforcement strains......Page 244
4.2 Influence of soil model on predicted wall response......Page 245
5 CONCLUSIONS......Page 246
REFERENCES......Page 247
2 PROJECT DESCRIPTION......Page 248
4 SITE CONDITIONS......Page 249
5 STRUCTURAL SYSTEM......Page 250
7.2 Geotechnical model......Page 251
7.4 Retaining system......Page 252
7.6 Modeling strategy......Page 253
7.7 Cases modeled......Page 254
REFERENCES......Page 258
2.2 Cavity expansion solutions......Page 259
3 PENETRATION DIFFCULTIES IN FLAC......Page 260
4.1 Formulation......Page 261
5.2 Assumptions......Page 262
6 RESULTS......Page 263
REFERENCES......Page 264
2 SITE CONDITIONS......Page 265
4.1 Case 1 loading from up to 38 m 125  of solid waste......Page 266
4.3 Dynamic analyses under the subduction 2001 Moquegua, Peru, earthquake time-histories......Page 267
4.5 Loading from a cavity collapsing in the existing wastes......Page 269
CONCLUSIONS......Page 270
REFERENCES......Page 271
3.1 Consultant analyses......Page 272
3.2 This study’s current modeling......Page 273
4.1 305 mm 12	 SDR 11 HDPE LCRS header pipe under solid waste load up to 26 m 85
......Page 274
4.4 Comparing FLAC predictions to those of traditional empirical formulas Petroff 1998......Page 275
4.5 Buckling......Page 277
REFERENCES......Page 278
2 LINER SUPPORT SYSTEM......Page 279
3 FLAC MODEL......Page 280
4 RESULTS......Page 282
ACKNOWLEDGMENTS......Page 283
2.1 Vertical section......Page 284
2.1.1 Undrained material......Page 285
2.1.3 Friction on pile surface......Page 287
2.2 Horizontal section......Page 288
3 THREE-DIMENSIONAL ANALYSES......Page 289
REFERENCES......Page 292
Dynamic and thermal analysis......Page 293
2 ASSUMPTIONS......Page 294
3.2 Governing equations......Page 295
4 PRACTICAL APPLICATION OF A FIRE LOAD WITHIN A TUNNEL......Page 297
5 VERIFICATION OF MATERIAL-MODEL AND CALCULATION RESULTS......Page 298
REFERENCES......Page 300
2 LIQUEFACTION......Page 301
3 CONSTITUTIVE MODEL: UBCSAND......Page 302
3.2 Plastic properties......Page 303
5 CENTRIFUGE TESTS......Page 304
5.1 Model 1......Page 305
5.2 Model 2......Page 307
6 SUMMARY......Page 310
REFERENCES......Page 311
2.1 Overview of FLAC model......Page 312
2.2 Specification of input motions......Page 313
2.5 Model parameters for wall......Page 314
2.6 Model parameters for wall-soil interface......Page 315
2.7 Dimensions of finite difference zones......Page 317
3.1 Permanent wall displacement......Page 318
3.2 Dynamic earth pressures......Page 319
REFERENCES......Page 320