... in great depth is rather challenging and ambitious. Fig. 4: Discontinuous modelling approach for salt rocks. major principal stress 1 [MPa] shear stress [MPa] 150 1 = D + 1 + MAX D + 3 3 100 Carnallitit 50 D = 10 MPa MAX = 90 MPa = 1.4 MPa Z = 6 MPa 0 0 20 40 minor principal stress 3...

... grains); (2) the minor principal stress is more uniformly distributed in the homogeneous model leading to higher strengths; (3) the geometric variation in grain size and shape induces a large tensile stress-field at relatively low strains when a rock is subject to compressive stresses; (4) geometric...

... and potash producing mines at both laboratory and large scales. Reservoir Characterization displacement closure rate convergence Upstream Oil & Gas potash minor principal stress pillar deformation department ofmineral engineering Engineering stacker area boundary condition vertical...

... Characterization metals & mining reservoir geomechanics Artificial Intelligence Upstream Oil & Gas orientation Martin minor principal stress transition zone major principal stress stress state database expression domain 1 principal stress geology Canadian Shield subprovince ontario...

... of a comparative study to evaluate the potential of Kaiser Effect method to determine in-situ stresses. Reservoir Characterization metals & mining reservoir geomechanics Upstream Oil & Gas maximum curvature method acoustic emission Rock mechanics minor principal stress borehole experiment...

... normal load minor principal stress borehole mathematical model bolt test photoelastic test two-dimensional solution Anchor photoelastic model loading anchor fracture axis stress field fracture perpendicular ARMA 67-0222 Chapter11 FRACTURING AROUND A ROCK BOLT ANCHOR by RichardS...

... of the borehole - the vertical major principal stress and the minor principal stress acting in a plane normal to the axis of the horizontal borehole. No attempt is usually made to assess the magnitude of the principal stress acting alone the axis of the borehole. In this paper a trepanning rock stress measuring...

...: P is always the major principal stress, and Q the minor. Compressive stresses are positive, and tensile stresses are negative. The principal stress difference, (P-Q), is always positive since it is the difference between major and minor principal stresses. The sum of the principal stresses, (P+Q...