... compressive and tensile tests on different combinations of infilling Gypsum to Clay ratio Uniaxial compressive strength (MPa) Tensile strength (MPa) Only gypsum 4.67 0.9 4 2.11 0.65 1.5 2.23 0.37 0.67 1.52 0.36 0.25 0.48 0.08 Only clay 0.32 0.02 3.1 Data analysis and determination of cohesion (C) and friction...

... network Upstream Oil & Gas supercritical carbon dioxide invasion scco 2 saturation MPa pore network simulation Pore network simulation of supercritical carbon dioxide invasion in Domengine sandstone Min-Kyung Jeon a , Tae-Hyuk kwon a *, Marco Voltolini b and Jonathan Ajo-Franklin b a Korea...

... stress change Reservoir Characterization coseismic stress transfer MPa Upstream Oil & Gas strainmeter site gladwin Stein borehole strainmeter data Coseismic Stress Transfer Detected by Borehole Strainmeter Data Inho Soh a and Chandong Chang a * a Chungnam National University, Daejeon...

... excavation stress path transition tunnel excavation effect excavation principal stress failure criteria mechanism MPa landslide slope numerical modeling limit state area landslide behavior displacement behavior case 1 Num When nearby s order to required The o displace the beha Keywor 1...

... displacement or slope instability. Wellbore Design displacement laboratory Upstream Oil & Gas validate numerical pendulum Reservoir Characterization modeling Rock mechanics Rock Block Displacement reservoir geomechanics numerical method variation stability MPa numerical modeling...

... During the stimulation period, maximum flow rate was 18.0 L/sec and the maximum wellhead pressure reached 27.7 MPa, which was considerably lower than 89 MPa observed during the PX-2 stimulation. In the first day of PX-1 stimulation, in December 15th 2016, clear pressure peaks during continuous injections...

... gravity stress. In other words, the stress in horizontal direction was higher than that in vertical direction. Reservoir Characterization strength calculation excavation Wellbore Design Chinese Journal MPa rock mass Upstream Oil & Gas roadway excavation parameter value ii zone...

... of the rocks. Modulus of Thickness Bulk density elasticity E Lithology (s/m) (kglm3) (MPa) Loess 5 1500 0.1 X 10"' Conglomerate 58 2487 1.35 X 1()4 Siltstone 40 2873 3.34 X 1()4 Post stone 6 2487 1.35 X 10' Sandy mudstone 2 2510 0.54x 10" Coal 7 1380 0.53 X 1()4 Sandy mudstone 4 2510 0.54 X 10" Post stone 26...

... necessary. strength mechanism threshold migmatitic granite Reservoir Characterization cyclic loading Loading Rate MPa granite Upstream Oil & Gas test specimen specimen loading metals & mining ae characteristic acoustic emission single loading peak strength strength threshold...

... taofrockstrengthunderdifferentconfiningpres u s(MPa)r gressionmodelwillbobtmned finallymini-zeshr iduals mofsqu roftheo gi amode Itisv yuitablob ainheunk ownparam t rsofhes re thcriterionbyusingtheGauss Newtoni ivm thdusadva glnc nv rgencetandccu cy E h rl arrn fi t ngmin iz sequ rd v antc thef tt ngpara -e ers Thereforemin mv agandfitt v...

... fluid formulation oil-based mud investigation increment salt rock Upstream Oil & Gas experiment MPa saturation speed micro crack drilling fluids and materials OBM different surface tension preexisted micro crack infiltration quantity permeability TransitDevelopmentinRockM hanics...

... considered the effect of groundwater on the rheological process. evolutionary algorithm Upstream Oil & Gas rheological model reservoir geomechanics Rock mechanics carbonaceous slate machine learning Artificial Intelligence damage variable specimen MPa constitutive model test data...

... are reached. rail transportation interactive tunnel construction subsidence excavation ground transportation tunnel construction MPa tunnel structure right line compressive stress secondary lining Reservoir Characterization Simulation right tunnel tensile stress maximum compressive...

.... hydraulic fracturing Chinese Journal horizontal stress shut-in pressure reservoir geomechanics principal horizontal stress Rock mechanics determination Drilling vertical stress Upstream Oil & Gas average value MPa horizontal principal stress principal stress Reservoir Characterization...

... <p modulus E Poisson name f(kN/m3) (MPa) (MPa) (MPa) e) (GPa) ratio (j.L) Rock 27.00 0.11 6.19 2.535 39.29 9.122 0.26 Ore 36.40 0.21 12.47 2.500 40.00 9.770 0.23 Table 2. Fault mechanics parameters of southern slope's typical profile. Fault number Fu1 - - ~ y ·- ,_ .. ,_ Normal Shear stiffness Kn stiffness Ks (MPa) (MPa) 3000 1000 Figure 3. Shear nephograms of rock. Cohesion c (MPa) 0.40 - . I ,, .. ·~ ' : rt\~ . ,, ,: , , , ~ 4iiXIOt4tlllol .. f»>t..ff.·lli:IOOI4:' OC11l0t4111Jit' ll lc Internal friction Tensile angle <p strength cr, e) (MPa) 32 0.0001 Figure 5. Horizontal displacement diagram of slope. - - s:~ , .. IIOJoOtl , ! ZUDO II C I q Figure 4. Maximum principal stress nephograms of Figure 6. Total di placement map of slope. rock...

...). structural geology borehole variation rule monitoring point Reservoir Characterization Chinese Journal borehole stressmeter position central south university metals &amp; mining stope tunnel MPa stress change Upstream Oil &amp; Gas deep exploitation stope tunnel stability fracture vertical...

... is temperature, N is number. From (Fig. 3), we know the uniaxial compres- sive strength of saturated Cretaceous sandstone increases with temperature decreasing. The uniax- ial compressive strength of Medium grained sand- stone increases from 11.335 MPa to 16.943 MPa, and the strength is improved by about 49.4 7...

... elastic energy Cundall stress distribution coal pillar MPa vertical stress distribution rock burst concentration factor strata TransitDevelopmentin Dc Mechanics Cai,Yang Wang(Eds)@2015aylor Fran isG oup L ndo ISBN978-1-138-02730 5Num ricalsi...

... Cohesion Tensile strength stratum p (kglm3) K(MPa) G(MPa) cp c (MPa) a, (MPa) Q 2000 16.7 7.69 18 0.13 0.01 E2X 2477 1660 1090 20 0.56 0.54 Ma 2630 2260 1620 35 2.99 0.82 Fe 2812 7720 5080 37 3.26 0.94 F 2600 16.7 10.8 30 0.32 0.0001 *Q: quaternary artificial deposits, Ep: breccia, Ma: magnetite, Fe...

... if the confining pressure exceeds 10 MPa, sylvine shows obvious inflation phenomenon. It is an approximately proportional relationship between the peak strength and confining pressure. The change rule of elasticity modulus along with confining pressure is also analyzed. The results show that with the increase...