Peng S., Zhang J., Engineering Geology for Underground Rocks
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Index
abutment pressure, 308
alluvial fan, 28
angle of internal friction, 16
anisotropic, 9
anisotropic stress field, 168
barrier island sediment, 32
bedding plane, 123
Biot, 23, 49, 93, 129, 135
borehole inclination, 153, 191
borehole instability, 165, 166
Brazilian test, 77
bulk density, 1, 2
bulk modulus, 136
caved zone, 223, 311
caving-proof pillar, 259
Cenozoic porous aquifer, 221
circular tunnel, 165
clastic rock, 103, 105, 111
cohesion, 16, 126
cohesive strength, 88
collapse pressure, 173
delta sediment, 31
density, 1
density-porosity equation, 4
discontinuity, 38, 40, 101, 121
bedding, 102, 120
structural plane, 103
unconformity, 102
weak layer, 102
double porosity, 127
drilling, 161
Drucker-Prager, 193
Drucker-Prager failure criterion, 61,
95, 186
DT, 16, 20
dual-porosity, 128, 187, 214
dynamic modulus, 12
effective stress, 23, 135, 171
effective stress coefficient, 178
elastic modulus, 10, 86
elastic solution, 166
elastoplastic solution, 175, 297
facies, 28
failure criteria, 184
far-field stress, 138, 139, 154
fault, 40, 248, 274
finite element method, 58, 131, 138,
181, 187, 214, 233
fluvial deposit, 29
fracture breakdown pressure, 51,
179
fracture closure pressure, 52
fracture gradient, 177, 178, 180
fracture initiation pressure, 51
fracture pressure, 179
fracture stiffness, 151
generalized plane strain, 134
geological structure, 38
Griffith failure criterion, 93
318 Index
Hoek-Brown criterion, 98
horizontal boreholes, 193
hydraulic conductivity, 8, 222, 249
hydraulic fracture, 51, 52
hydraulic fracturing, 50
inclined borehole, 137, 169
in-situ stress, 45, 57, 140
in-situ stress measurement, 49, 54,
67
in-situ stress regime, 45
instantaneous shut-in pressure, 51
internal friction angle, 88
isotropic, 20, 130
karst aquifer, 261
lagoon, tidal lagoon, 33
lake sediment, 32
leak-off test, 178
lithology, 37, 112, 114
longwall mining, 219, 232, 306, 309
LOT, 50, 52
matrix density, 2
maximum horizontal stress, 52, 53
minimum horizontal stress, 49
minimum mud pressure, 172
minimum mud pressure gradient,
173
minimum mud weight, 173
mining above aquifer, 269
mining above confined aquifer, 261
mining at shallow depth, 246
mining induced failure zone, 311
mining induced fracture, 222
mining near aquifer, 214
mining over aquifer, 281
mining under aquifer, 229
modified Lade failure criterion, 97
Mohr circle, 88, 125
Mohr-Coulomb, 87, 194
Mohr-Coulomb failure criterion, 46,
94, 186, 297
mud cake, 184
mud density, 162
mud weight, 53, 174, 183
naturally fractured formation, 129,
162, 180
normal faulting stress regime, 45,
196
normal stiffness, 120
Ordovician, 221, 261, 282
Ordovician aquifer, 262
outcrop coal pillar, 254
overburden stress, 47
overcoring, 65, 68
paleo-sinkhole, 282, 283, 286
permeability and strain relationship,
203
permeability tensor, 9
permeability-stress relation, 213
Permo-Carboniferous, 221, 261, 282
point load test, 76
Poisson’s ratio, 13, 49, 79
polyaxial compressive test, 91
pore pressure, 49, 55
hydrostatic, 55
overpressured, 55, 127
pore pressure gradient, 56
pore pressure prediction, 55
poroelastic solution, 131, 180
poroelasticity, 127
poromechanical, 130
porosity, 2, 4, 7
porous media, 129
reverse faulting stress regime, 45
roadway stability, 299, 302
rock failure criteria, 91
rock failure type, 91
rock strength, 15, 75
rock strength empirical relationship,
16
rubble zone, 127
Index 319
sand-proof pillar, 258
sedimentary environment, 27
sedimentary plane, 39
sedimentary rock, 35, 101
shear failure, 92, 186
shear failure gradient, 173, 180
shear failure pressure, 173
shear stiffness, 121
single porosity, 187
single-porosity, 145
sonic transit time, 5, 16, 20
static elastic modulus, 12
strata classification, 304, 305
strata failure, 219, 222, 249, 263,
287
strength correlation, 18
stress and fluid flow, 204
stress and porosity, 7
stress-dependent permeability, 199,
207
stress-strain curve, 11, 113
stress-strain relationship, 20
strike-slip faulting stress regime, 45,
187
structure plane, 40
subsidence zone, 311
tensile failure, 93, 164
tensile strength test, 75
Terzaghi, 23, 93, 129
time-dependent, 146
triaxial compression test, 84
triaxial compressive stress-strain-
permeability test, 200
triaxial compressive test, 112, 114
UCS, 16, 17, 79, 93, 122, 227
unconfined compressive test, 78
unconsolidated formation, 5
underground excavation, 295
uniaxial compressive strength, 15,
83, 126
uniaxial compressive test, 11, 78,
111
vertical borehole, 52, 171
vertical stress, 47
water impact, 125
water inrush, 222, 231, 246, 261,
265, 271, 277, 285, 288
water inrush prediction, 278
water-conducting failure zone, 263,
269
water-conducting fractured zone,
222, 229, 230
water-conducting height, 227
water-proof pillar, 254
wellbore instability, 163
wellbore stability, 161, 166
breakout, 161, 165
collapse failure, 186
drilling induced fracture, 173
drilling induced tensile fracture,
165
fluid loss, 163
hole closure, 162
lost circulation, 162, 163
ovalization, 162
shear failure, 185
spalling, 149, 173, 185
splintering, 173, 185, 188
stuck, 180
tensile failure, 173, 185
tight hole, 180
undergauged, 161
yield zone, 307
Young’s modulus, 10, 79, 122, 124
Printing: Krips bv, Meppel
Binding: Stürtz, Würzburg