... of seismic events, which are the velocity of a reduced center of seismic energy release and the apparent velocity of "migration" of individual seismic events closely timed within the ranges of stress concentration zones inside the mine fields. Verification of this criterion using an ample seismic data base...

.... Curvilinear cracks (wing crack) initiated near the joint tips and propagated toward the other inner joint tip. The numerical model showed that tensile stress concentration caused wing crack initiation due to stress flow around the pre-existing non-persistent open joints. I compared the yielding behavior...

... also highly influences the fracking process, which however may significantly vary with the pore fluid concentration due to the associated brine-rock interactions creating rock structure re-arrangements. This study has therefore been aimed to investigate the effect of pore fluid (brine) concentration...

... Downstream Oil & Gas LNG water curtain tunnel shaft plug plug gas leakage storage cavern natural gas storage gas monetization operation shaft plug operation shaft concentration injection borehole shaft containment system excavation concrete plug water injection borehole permeability...

.... Reservoir Characterization magdalena colliery-south africa bord specimen excavation reservoir geomechanics colliery horizontal stress test result metals & mining concentration shale magdalena colliery Poisson structural geology input parameter roof layer investigation Magnitude...

... operations are continually advancing deeper and thus into higher stress regimes, and so there is an increasing need for stress control techniques to protect vital infrastructure against violent rock bursting events in deep underground excavations. The large stress concentrations induced around underground...

... climate change structural geology Reservoir Characterization attenuation subsurface storage Upstream Oil & Gas co 2 canal flow-thru triaxial experiment permeability concentration contribution plug evolution Rock mechanics experiment deionized water Corvio Sandstone diw...

... preparation. Reservoir Characterization wavelength recognition application radiation x-ray fluorescence fluorescence mineral Artificial Intelligence concentration analyzer Madrid Upstream Oil & Gas preparation information x-ray fluorescence method granite spectrum Feldspar x-ray...

... Abstract Stress concentration and rockburst risk in coal mine are associated with the occurrence of competent strata in overburdened coal seams. Benches of sandstone and conglomerate are difficult unbreakable and a high level of elastic energy is stored there. It can be released as a rockburst...

... of competent adjacent rocks in the roof of the seams and incomplete seam extraction in the overburden, cause irregular stress distribution in the rock mass and stress overflow in those regions with the highest stress concentration. Destress blasting in overlying competent rocks is a very important rockburst...

... metals & mining Production Chemistry Upstream Oil & Gas Pipeline Corrosion Subsurface Corrosion Corrosion Inhibition materials and corrosion riser corrosion H2S management rockbolt Crosky Corrosion Management rawat 1976 laboratory concentration steel Sulfide New South Wales rock...

... injection hole after injection of 160 minutes. The distribution of grout concentration as well as hydraulic conductivity reduction rate clearly shows the anisotropic infiltration of grout. 1 INTRODUCTION Grouting, which involves injection of grout material, is commonly used to decrease the hydraulic...

... of the theoretical models for the swelling problem and of recent or ongoing investigations at different scales (micro- to mega- scale). concentration surface area anhydrite Reservoir Characterization Equilibrium concentration crystallization ion concentration Upstream Oil & Gas anhydrite...

... rock can stabilize the rotating grains only when their concentration is below a critical value. The critical concentration is shown to depend upon the magnitude of compressive stress. There exists a critical magnitude when the critical concentration is zero such that the first rotating grain initiates...

... of the temperature dependence of microbial metabolism. yeast Obihiro sample precipitation test Horonobe temperature dependence okayama caco 3 microorganism soil microorganism test tube precipitation Okinawa sample mold biogrout concentration caso 4 Sapporo metabolism 339 Rock Engineering...

... in the massif, and the horizontal stresses were 1.5-2.6 the vertical ones which equaled the overlying rock weight (yH = -16.5 to -73.0 MPa). Technological blasting creates anomalous stress concentrations in the vicinity of mine workings. Owing to this, elastic energy accumulates in rock masses and disturbs...

... waste management approximation Upstream Oil & Gas density-dependent flow density effect decontamination variant maryska Cenomanian aquifer operation aquifer Turonian aquifer sandstone initial concentration produced water discharge concentration porosity solute transport gIL...

... geomechanics calculation split layer numerical calculation vertical stress metals & mining concentration stress Strain Formation stape pillar Reservoir Characterization vicinity critical value operation rock mass stope Baryshnikov Mining Stope stress state sublevel massif Eurock 2005...

... reservoir geomechanics Wellbore Design concentration transversely isotropic shale Reservoir Characterization flow in porous media pore pressure borehole Artificial Intelligence Fluid Dynamics variation coefficient field equation equation isotropic porous media diffusion Drilling...

... plan is very important. Key operation indicators such as the water pressure, tJ1C brine concentration and the fluids flux of different wells are monitored periodically during the production process, and the solution control plan is adjusted in accordance with the monitoring results. Two solution...