.... In this paper, the Thornhill Sandstone is examined by applying numerical analysis and its mechanical response is investigated under several scenarios with varying excavation geometries, stress conditions while incorporating the influence of discontinuities explicitly within the numerical model. A two...

..., rotational and toppling failure as potential instability mechanisms. Whereas the three first types involve sliding associated to different geometries of the unstable element or mass, toppling often involves also sliding and very complex geometries of multiple elements. In this sense, toppling should...

... Abstract One of the major challenges facing rock engineers is that of establishing the bulk properties of the fractured rock mass on which or in which they are working. These are controlled principally by the geometry of the fracture network and the properties of the individual fractures...

... propagation. In order to extend the p CT concept to complementary geometries with potential interest we studied an alternative to the SCB specimen, which we call pseudo -SCB ( p SCB). To compute K IC in this configuration we have derived the corresponding dimensionless stress intensity factor function...

... engineer. The parameters resulting from the investigation, such as discontinuities, orientations and spacings, potential rockfall initiation locations, slope geometry, and ditch profile, are either measured or estimated. We propose a photogrammetry-based method for estimating the probability of failure...

... pit was located. This study is Rock Mechanics focused and discusses the methods used to assess the geometry and stability of the historic mine workings. The need for innovation stemmed from the limited historic plans and documentation that existed. Empirical methods suggested that the crown pillar...

... and design charts provide geotechnical engineers: (i) a rapid means of predicting of slope behavior; and (ii) guidance on stable slope geometry (e.g. bench face angle, height and width). They are most effective when the geometry, geology, hydrogeology and geomechanical properties of the slope under review...

... Abstract The requirements on sample geometry for strength tests are specified in standards and recommendations such as those provided by ASTM, ISRM and DGGT. Various circumstances may lead to deviations from these specifications, e.g., the nature of the rock material, lack of time, economic...

..., the geometry of the blasts, the characteristics of the explosive and its interaction with the rock mass, paying attention to the correlation between initiation timing and induced fragmentation. A detailed description of some empirical models together with the Split-desktop software were therefore provided...

... gabion gabion module geology practice iop publishing iop conf rock engineering extremity node displacement theory geometry Mechanics and Rock Engineering, from Theory to Practice IOP Publishing IOP Conf. Series: Earth and Environmental Science 833 (2021) 012102 doi:10.1088/1755-1315/833/1...

... Abstract The stability analysis of underground mine systems with complex 3D geometry is still a challenging task, especially when abandoned mines are planned for new uses with public access, that imply more restrictive safety requirements. This inherently multi-scale problem requires both...

... geomechanics expansion coefficient hydration Reservoir Characterization displacement boundary condition bentonite hydration saturation Artificial Intelligence discrete fracture geometry Upstream Oil & Gas borehole procedia engineering 191 bentonite interface han�ilová diffusion equation...

... on fracture propagation geometry. Three-dimensional discontinuum modelling results showed similar behaviors as two-dimensional modelling. Inclined orientation of wellbores with respect to principal stresses and enabling fluid backflow after each fracturing stage were found to be effective to minimize...

... Abstract Understanding changes in slope geometry and knowledge of underlying engineering properties of the rock mass are essential for the safe design of man-made slopes and to reduce the significant risks associated with slope failure. Recent advances in the geomatics industry have provided...

... geometry hormazabal cerro vanguardia procedure excavation cerro vanguardia open pit mining Rock Mechanics and Rock Engineering: From the Past to the Future Ulusay et al. (Eds) © 2016 Taylor & Francis Group, London, ISBN 978-1-138-03265-1 Cerro Vanguardia open pit mining: Database management...

... from their original locations following four basic types of motions: free-falling, bouncing, rolling and sliding. Rockfall kinematics and dynamics mainly depend on the topography, block weight and geometry, mechanical properties of the slope forming material such as friction angle, roughness...

... BGS) has led to an evergrowing complexity in the geometry of the mine, which cannot be adequately assessed solely with empirical design methods. This work presents a case study in which empirical and numerical methods were integrated to assess the stability of a stope roof and adjoining pillar...

... of the CCBO method. reservoir geomechanics strain gauge stress determination geometry stress field Reservoir Characterization ccbo cell compact conical-ended borehole stress tensor determination local stress tensor excavation-induced stress ccbo method inverse analysis anisotropy Situ...

... metals & mining strength failure criterion geometry Upstream Oil & Gas criteria rock mass reservoir geomechanics criterion extraction open stope pillar Reservoir Characterization stope crown pillar rock mass behavior excavation Hoek stress state georgieva crown pillar...

..., hydraulic fracturing or the stability of geotechnical structures in hard rock. Fracture propagation geometries can be subdivided into three principal modes: tensile (mode I), in-plane shearing (mode II) and out-of-plane tearing (mode III) (e.g. Anderson 2005). We are focusing on the tensile mode I...