... Abstract Excavations in rock masses determine the creation of temporary or final exposed surfaces. Features of these surfaces are depending on both geostructural pattern of the rock mass and adopted excavation method: among the others, roughness, quality of the contour and induced damage...

..., underground measurements are very important. To identify the main pattern of deformation processes in pillars and choose the most informative indicators, mine studies including deformation measurements using contour and deep reference points were carried out. These measurements were carried out in various...

... Abstract: The pre-splitting is one of the techniques for contour blasting that have been developed from the fifties and until now is one of the most useful in a series of cases, as in the blast vibrations attenuation and in cut a line to define and isolated a region to be broken. This consists...

...- ment history becomes constant it is concluded that an equilibrium state has been reached. Contours of vertical stresses (in z direction) for original structure are presented in Figure 3. Charac- teristics of stress distribution reveal that hypotheti- cal model configuration and loading conditions...

... equation (2) with boundary and initial conditions: (I) e(x, 0) = 0, X E Du I", (5) ae -- +h(y,t)fJ(y,t)=h(y,t)8(y,t), YEF, t > 0, (6) 01(y) (2) D is multiconnected domain in the plane (XI, X2)restricted by simple closed smooth contours fi. If domain D is finite then I' = fa U fl U U fll and contour fa...

... the models have been prepared con- sidering unit element in Ydirection, perpendicular to plane of the paper. The numerical analysis has been carried out in rwo steps. Step I comprises of the analysis for the stresses and step 2 to obtain the safety factor contours. For one shape of underground opening...

... at the inclination direction and different sections would be excavated separately. Artificial Intelligence direct roof Reservoir Characterization strength oxidized ore metals & mining stability analysis contour ore pillar excavation oxidized ore stope stress value stope Simulation tensile...

... of the trans- former cavern on the behaviour of the power cavern is insignificant. Displacements of the transformer cavern contour are directed to the power cavern. Only for the bedding parallel shearplanes the overstressed zones around both caverns are in contact. The transformer cavern was elevated above...