... ground model Artificial Intelligence settlement reference value pressuremeter test parameter 1 backanalysis contour excavation tunnel equation MODEL PARAMETERS - HOW TO AVOID THEM Harry R. Asche1, Robert A. Day2 and John Doherty3 ABSTRACT The use of numerical models requires determination...

... and Hangingwall Schist. Reservoir Characterization north wall numerical stress analysis geometry fabric open cut metals & mining contour south wall stress change open pit batter stope underground mining operation schist geology barrier pillar Static and Dynamic Considerations...

... displacement minor principal stress right wall Upstream Oil & Gas sidewall excavation reservoir geomechanics powerhouse cavern stress analysis MPa Reservoir Characterization cavern contour scale 1 tensile-stress area principal stress consecutive excavation stage principal...

... orientation contour Shemyakin stressed-strained state fracture explosion Zonal disintegration investigation FSD massif Reservoir Characterization kurlenya borehole Oparin diagram USSR Rock at Great Depth, Maury & Fourmaintraux (eds), © 1990 Balkema, Rotterdam. ISBN 90 6191 9754 The use...

... factor contour compressive stress compression dilatancy initial crack value 0 axis brace deformation Rock at Great Depth, Maury & Fourmaintraux (eds), © 1990 Balkema, Rotterdam. ISBN 90 6191 9754 A mechanism of deformation and fracture of brittle rock Un mecanisme de deformation et de rupture...

...), the above solution can be used to determine the rock deformation modulus E o. In the primal problem the basic formulas for determining displacements of the points of the borehole cross-section contour are derived by D.I. Sherman's method using the theory of analytical functions of complex variable...

... contour excavation expression metals & mining excavation contour formula stability failure process Rock Excavation Destruction propagation destruction fracture hydraulic fracturing criterion failure zone procedure rock mass excavation destruction Rock at Great Depth, Maury...

... of principal stresses is also shown on the projected step of the left wall close to the floor of the cavern The distribution of de-stressed areas along the walls of the cavern is also shown in the contours of major principal stress in Fig. 4. The contours of major principal stress for the one-stage...

...-chimiques des roches avoisinantes autour des ouvrages miniers dans les mines des bassins de Donetzk et de Karaganda. Observations on rock behaviour on contour of workings show changes of rock strength in the course of time. Thus, we observed the cases when at first a working was driven in strong rocks...

...DETERMINATION OF OPTIMAL SHAPE OF UNDERGROUND OPENINGS AT HIGH INTERNAL PRESSURE AROUND ITS CONTOUR Bestimmung der optimalen Hohlraumform bei hohem Innendruck Determination de la forme optimale des cavites souterraines de pression interne elevee autour de leurs contours N.P.YLOKH & A.Y.ZOUBKOY...

... provides more favourable stress conditions at the contour. ZUSAMMENFASSUNG: Anderungen der Energisituation wie auch Sicherheitaspekten haben neue und strengere Anspruche fuer öllagerung mitgebracht. Dadurch hat es sich notwendig gezeigt einen steigernden Anteil von den öllagern untertage zu bringen...

... of the elastic analysis of the slope with joints due to gravity load- ing have been plott d in Pig. 4. Fig. 4~ ~hows the deformed mesh near the free face and it can be seen that the column tilts backwards. From the contours of the principal stress, 01 plotted in Fig. 4b. it can be observed that there are some...

... Fig.2, the pat- tern of moisture stress and rock displacement distribution upon depth wetting from a borehole is the fol- lowing: radial moisture stresses and displacements are of an extremal nature and have zero values at the contour of the working, whereas the tangential stresses reach their ma...

... metals & mining nearby structure vibration velocity Vibration Aspect exploration Reservoir Characterization particle velocity basalt bench height rock mass frequency dam foundation Foundation Level smooth surface sandstone contour excavation detrimental effect foundation...

... Summary General stability criteria for unsupported cavity cross-sections in bedrock are given. For a special class of cross section then terms and statements are discussed by the aid of which stability investigations on the cavity contours are to be carried out. This is followed...