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Keywords: discontinuity
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Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-478
... austria government reservoir characterization hb criterion tauern window geologist europe government figure hoek-brown strength criterion mathematics of computing criterion calculation flank structural geology envelope tyrol austria val example discontinuity equilibrium...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-481
... ABSTRACT: RMR and SMR are two of the most applied classifications for tunnels and slopes, respectively, excavated in rock masses. Five parameters are used to compute the basic RMR classification for each discontinuity set. However, it is not clarified the whole Rock Mass RMR value. Here...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-493
... excavation geometry is analyzed in this study. The exploited rock mass is characterized by a nonubiquitous discontinuity distribution due to the presence of highly fractured bands, mainly parallel to the excavation faces. The discontinuity network needs to be analyzed to forecast the rock mass mechanical...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-476
...15th ISRM Congress 2023 & 72nd Geomechanics Colloquium. Schubert & Kluckner (eds.) © ÖGG Use of representative values of geometrical properties of discontinuities in rock slope verifications according to EC7 Javier González-Gallego CEDEX-Laboratorio de Geotecnia, Madrid, Spain José Estaire CEDEX...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-008
... was driven approximately 60m northeast, see Figure 1. The project is in an area of quartz-rich paragneiss with alternating layers of mica schist. Basically, it is a stable rock mass, in which the rock behaviour is dominated by potential of discontinuity controlled block fall (GVT 2, according to ÖGG...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-485
... strength and corresponding dilation of unfilled discontinuities of rock masses, incorporating the uncertainties of the variables that govern their shear behavior. It was found that the proposed ANFIS models can be considered a useful tool to predict the shear behavior of clean discontinuities...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-467
... along with the topography is the overburden and the resulting in-situ stress state. This is favorable also for water ingress via discontinuities and fault zones, which may also affect the thermal performance of the storage structure. The environmental and economic aspects may be the crucial point...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-495
... season. For the present study, 50 rock slope sites were considered over a stretch of 35 km on a national highway. The various attributes of discontinuities governing the slope failure were observed and the joint spacing in the stretch of the national highway is studied in detail. Detailed scanline survey...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-477
...15th ISRM Congress 2023 & 72nd Geomechanics Colloquium. Schubert & Kluckner (eds.) © ÖGG Capturing the roughness of discontinuity traces in the field with high accuracy: the effect of photograph resolution Clarence Butcher University of Newcastle, Newcastle, Australia Olivier Buzzi University...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-471
... from the RMR system by appending adjustment parameters for discontinuity orientations in relation to the slope attitude, as well as the effect of the excavation method, as expressed in the following equation: = b + 1 2 3) + 4 (1) wherein, RMRb is the RMR value determined from the RMR version from...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-470
...-contact geomechanical surveys, aiming at a proper definition of the geometric properties (i.e., orientation and spacing of discontinuities), with added information related to mechanical features (i.e., friction angle and cohesion of discontinuities) that can be either derived from empirical relations...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-488
... dipping along with complex geological conditions in terms of multiple rock types in the surrounding region and discontinuities weakening the rock mass properties. Therefore, special attention must be given to the geotechnical parameter characterization and how the structural instabilities (planar, wedge...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-091
... wellbore design wellbore integrity geology artificial intelligence geological subdiscipline reconstruction upstream oil & gas discontinuity reservoir characterization extraction university cloud reconstruction software civil engineering influence dataset leica geosystem ag...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-131
... discontinuity in a slope along the Elva Valley Road (Northwestern Italy) subject to frequent and intense instability phenomena. A digital surface model (DSM) of the entire surface was obtained through UAV (Unmanned Aerial Vehicle) photogrammetric technique and the resulting point cloud was analyzed in order...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-121
... of discontinuities, F. condition of discontinuities, G. direction of discontinuities, H. presence of water inflow, I. deterioration due to water) The evaluation is graded on four levels. The objective of this study is to use deep learning to quantitatively evaluate the frequency, condition, and morphology...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-123
... functions include: (1) spatially identifying and extracting the point clouds of each discontinuity set; (2) quantifying the geometric parameters of each set (orientation, spacing and persistence); (3) characterizing the in-situ block system by assembling the block-forming sets into discrete fracture network...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-141
... ABSTRACT: In geological surveys with a rock engineering focus, the investigation and description of discontinuities is an important but time-consuming and labor-intensive step. With advances in surveying and mapping technology, digital surface models (DSM) and their corresponding point clouds...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-116
... ABSTRACT: In this study, the use of automated discontinuity orientation analysis is evaluated as a potential addition to manual data collection. Point clouds of outcrops of three different rock masses in Germany with distinct structural characteristics are analysed using Open-Source Software...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-101
..., University of Toronto, Toronto, Canad ABSTRACT: The shear behavior of a discontinuity can be significantly influenced by its surface characteristics. This paper compares manual and sensor-based geotechnical core logging methods for joint surface characterization. More than 500 m of core samples were logged...

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