... deviation direction suggest that elongations were caused by tool drag rather than stress-induced failure. In the lower depth interval the direction of borehole elongation doesn't agree with that of borehole deviation and elongations have cross sections that are typical of true stress-induced breakouts. From...

... deviation deformation discreteness coefficient rock mass deformation discrete nature Rock at Great Depth, Maury & Fourmaintraux (eds), © 1989 Balkema, Rotterdam. ISBN 906191975 4 Discrete nature of rock mass deformation Nature discrete de la deformation des massifs rocheux Diskrete Eigenschaften der...

... OF THE SYSTEM In this system, in order to consider the local deviations of regularity of joints, we classified the objected area into regions according to the distributional characteristics being statistically judged as a similar one, and we clarified the joint population in the objected area into several...

... is compared with those determined by other principles of rock stress measurements, and discussed from the view point of plate tectonics, It is indicated that results of the present measurement agree with those of several other measurements in a reasonable range of deviation from the view points of measurement...

... of South Africa (Leeman and Hayes 1966) is well known. virgin stress measurement deviation disturbance strain cell reservoir geomechanics Rock mechanics Pretoria basic stress field csir triaxial strain cell cavern virgin stress field tensor component stress measurement Reservoir...

... through, a finite difference form. fractured zone basaltic rock boundary condition electrical analogy Reservoir Characterization deviation resistor conductivity tunnel equation Upstream Oil & Gas hydraulic conductivity mesh test 1 test 2 horizontal vertical horizontal seepage...