... theory mining void accuracy representation Mechanics and Rock Engineering, from Theory to Practice IOP Publishing IOP Conf. Series: Earth and Environmental Science 833 (2021) 012108 doi:10.1088/1755-1315/833/1/012108 Stability modeling of complex underground mine openings integrating point clouds...

... of photos, daily captured by one or more fixed cameras. In comparison to other topographical method this new procedure has a lower accuracy, but provides distributed daily measurements, spatially very dense over the entire landslide area. The multi-view configuration also allows the reconstruction...

... reservoir geomechanics rock engineering metals & mining monument environmental science 833 pillar reservoir characterization north america government practice iop publishing iop conf deformation geological subdiscipline topography theory satellite insar imaging accuracy insar application...

... and reference gave a 3D accuracy of 0.05 mm at a distance of 13 m, which corresponds to 1.3 mm at 500 m, assuming linear behaviour. These initial results indicate that InSARTrac can provide a reliable means for obtaining accurate 3D slope displacement vectors remotely and without the use of reflectors. Current...

... and conventional measurement devices to provide a comprehensive database required for development of an effective slope monitoring and risk management program. The integration of different techniques, such as high accuracy discrete point measurement at critical locations, which can be used to complement larger...

... strength of rock σ t are negative. And the accuracy of rockburst prediction model with above three indexes reached 85%, which satisfied the need of actual projects. 1 INTRODUCTION Rockburst is a kind of geotechnical disaster with dynamic failure. When surrounding rock is excavated in underground...

... 810 emulsion explosive by Forcit. Ground Penetrating Radar (GPR) based GPR EDZ method was the central tool in measuring the EDZ extent. hydraulic fracturing waste management Wellbore Design Completion Installation and Operations accuracy nonelectric detonator excavation design edz extent...

... of a complete dataset. A database of rock discontinuities characteristics is essential for performing slope stability analyses and therefore obtaining sound input data for the design of proper protection works. accuracy protection work point density rock mass characterization orientation Rock...

... spaced points, ensuring that the relevant features of the rock face are captured in the point cloud. To become a real alternative (both in terms of pro- ductivity as well as accuracy) to a traditional survey, interactive or automated software tools are necessary, to allow the efficient selection from...

... Abstract The accuracy of the basic input data is extremely important in slopes stability analysis. Primarily such inputs include orientation of the planes of weakness (joints) existing in the rock mass in question, as well as parameters of the shear strength along these joints and across...

..., Lato et al. 2009, Fekete et al. 2010, Sturzenegger & Stead 2009). Upstream Oil & Gas accuracy point cloud data ellipse profile analysis lidar data tunnel deformation displacement profile tunnel Artificial Intelligence terrestrial laser LiDAR eurock 2012 Laser scan data...

... the two dimensional stress state on a flat surface. In this paper, this method is modified by adding three extra directions for measuring the deformation around the borehole. Actually, there is only one state of stress, but it can be determined with different accuracy by different combinations of measured...

... in data and questionable accuracy. The strength of a sedimentary rock is a function of inter-particle friction and grain interlocking. Inter-particle friction is affected by degree of consolidation, and inter- locking is affected by grainsize. This paper provides evidence that a system which indirectly...

... of the points in the real world or a global coordinate system). With eight known points, and thus the distance between them, 3DM Analyst can generate a 3D model with very high accuracy (Somervuori & Lamberg, 2010). For the purpose of data collection, a Canon EOS 5D mark II digital camera with remote release...

... as a continuum and distributing the weakness in material by constitutive relations. The ability of the bonded-particle model to initiate, propagate and track fractures, makes it a suitable tool for understanding and studying damage in rocks. The accuracy of the bonded-particle model in the simulation...

... in Switzerland and the French nuclear waste agency Andra. 2 PROJECT OUTLINE The main objectives were to: demonstrate the present capability and limitations of monitoring shape changes of underground openings within the absolute accuracy of <±5 mm; identify potential improvements in field prepara- tions...

... problem still lies in the bad computation convergence due to characteristics of geo-structures and geo-materials (Yang et al 2008). global analysis domain Geotechnique accuracy safety factor virtual gauss Strength Reduction Method stability analysis slope stability analysis rigid limit...

... and localize discrete deformation zones with high accuracy. AsTDR measurements are influenced by a great variety of parameters, as for instance the used coaxial cable and grout type, they often are ambiguous, thereby hindering the quantification of the deformation. By the definition of calibrated installation...

... metrology has been nearly established, but its use in civil engineering requires solution of numerous problems. A test was therefore conducted in an actual tunnel to verify measurement accuracy for tunnel configurations for assessing the applicability to convergence measurement in tunnels. As a result...

... recollection specimen metals &amp; mining axial stress stress memory utagawa Reservoir Characterization cyclic loading acoustic emission sandstone loading takeoff point Kaiser effect estimation Upstream Oil &amp; Gas accuracy delay time Signature granite katsuyama stress level Eurock '96...