.... Properties such as breakout orientation, width and depth can all potentially be used to constrain the in situ stress state. In this paper, we present a novel global optimization and associated objective function that uses breakout data to constrain the normalized in situ stress tensor. This tensor is one...

... volume and permeability. The impact of sample orientation (parallel and perpendicular to the bedding plane), calcite content and gas injection was analyzed. It resulted that the higher the calcite content, the less effective the self-sealing process. No significant influence of the sample orientation...

... geometry constraint construction united states government block theory orientation coefficient detection 15th ISRM Congress 2023 & 72nd Geomechanics Colloquium. Schubert & Kluckner (eds.) © ÖGG A Block Theory approach for rock erodibility assessment incorporating 3D high-resolution site...

... ABSTRACT: In-situ stress is a critical boundary condition that dictates many important rock engineering design decisions such as the orientation, dimensioning and support design of underground excavations for mining and civil infrastructure to ensure stability and safety, as well...

... quarry upstream oil & gas sedimentology reservoir characterization htai dam discontinuity information piezometer granodiorite gneiss investigation requirement foundation tiwag-tiroler wasserkraft ag orientation deposit monitoring layout 15th ISRM Congress 2023 & 72nd Geomechanics...

... was used to create 2 orthogonal intersecting fractures with either a "+" or "x" orientation relative to an applied vertical load. 3D X-ray microscopy was used to image the fracture network. For the "+" orientation, the network connectivity was maintained by the vertical fracture that did not deform...

... until they reach the surface and causes instant or progressive subsidence (Waltham et al. 2004 and Whaltman & Fookes 2005). Therefore, in the same way as in tunnel exploration, it is important to characterize joint set orientation, the size of the loose blocks, to check for highly fractured zones...

... ABSTRACT: Accurate mapping of geological structures and their orientations is a crucial step for analysis of underground excavation stability. A case is presented of a novel digital mapping workflow for generating a discrete fracture network (DFN) model. The RockMass Eon applies the 3...

... relies on the practitioner's experience. This is challenging in veined rocks that exhibit significant variability in the results. To reduce this uncertainty, this study investigates the influence of intravein grain-scale geometric heterogeneity and orientation on the emergent veined specimen strength...

...). geology reservoir characterization set 1 inventory austria government reservoir geomechanics europe government geological subdiscipline persistence distinct element modelling set 2 schistosity geologist mechanism discontinuity orientation wedge figure 2 rock engineering figure 3...

... government discontinuity calculation strength tunnel characteristic computing orientation textbook 15th ISRM Congress 2023 & 72nd Geomechanics Colloquium. Schubert & Kluckner (eds.) © ÖGG A critical look to the practical use of Rock Mass Rating (RMR) and Slope Mass Rating (SMR) Miguel Cano, José...

... For stability analysis of rock slopes (wedges, plane failure, toppling, etc.), the data chosen for the calculation concerning the spatial orientation of each of the families (dip and dip direction) are decisive. Moreover, the orientation and characteristics of the families influence the stability of a slope...

... pressures and displacements at the boundary of the test specimen were monitored. An exhaustive analysis of test results revealed that the deformation modulus is more sensitive to varying in-situ stress ratio than joint orientations. The modulus is found to decrease with increasing stress ratio. In addition...

... strength can be challenging. The orientation of single or multiple geological structures (e.g., bedding, schistosity, etc.) can drastically reduce the overall rock mass strength from the intact strength. Figure 1b illustrates how the orientation of joints to the axial load ( α j ) and the joint friction...

... government geology hydraulic fracturing reservoir geomechanics fracture germany government wellbore integrity geological subdiscipline geothermal reservoir investigation borehole borehole stability pfraundorfer dolomit limestone fracture toughness engineering geology orientation north alpine...

... are proposed to ascertain long-term stability of the cut-slope. INTRODUCTION Stability of rock slope is dependent on the slope topography, the orientation of discontinuity planes, the shear strength of discontinuities, groundwater and stress conditions, and the seismic acceleration magnitude. The factors...

... shotcrete orientation construction university crown asia government cavern basin settling basin underground settling basin 15th ISRM Congress 2023 & 72nd Geomechanics Colloquium. Schubert & Kluckner (eds.) © ÖGG Stability issues associated with the construction of underground caverns of Super...

... of the fracture growth based on local stress magnitude and orientation, reservoir rheological and fluid conductivity properties and characteristic of the in-situ Discrete Fracture Network (DFN). However, the impact of heterogeneity, local stress shadows and rotation and the fracturing process itself can result...

... was applied beyond the accessibility line (>2 m), and included determination of RQD , joint spacing and orientation. The rock mass is split into three zones, wherein RMR score equaled 64, 57, and 56 for Zone 1, 2 and 3, respectively, whereas SMR score equaled 49, 42, and 41, respectively. A better...

... suitable pit design is selected by changing the slope angle and pit orientation. It was found that the optimized slope design in terms of both safety and productivity can be achieved at an overall slope angle of around 35° with a stripping ratio of approximately 3.5. INTRODUCTION Demand for mineral...