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Keywords: fracture
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Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-177
... ABSTRACT: Fracture characteristics in and around active fault zones are required for understanding hydrogeological characteristics along fault zones. To examine the fracture characteristics, we used core samples and geophysical log data collected from the Futagawa fault drilling project...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-155
... ABSTRACT: Tracer testing is a commonly used method to characterize flow and transport in subsurface fractured reservoirs. The interpretation of tracer recovery data generally requires numerous forward simulations of tracer transport in the underlying fracture and matrix. Previous studies have...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-206
... ABSTRACT: Self-sealing tests with water injection were performed on artificially fractured core samples of the Callovo-Oxfordian claystone using an X-ray transparent triaxial cell. 3D X-ray scans and permeability measurements were performed continuously to assess the evolution of fracture...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-231
... engineering design is the in-situ stress state. The in-situ stress is a tensor quantity, and it dictates many of the most important design decisions regarding excavation stability, orientation optimization and support design to ensure safety, as well as borehole stability and induced fracture orientation...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-150
... ABSTRACT: Though fracture intersections control the connectivity of a fracture network, few studies have examined the deformation of intersections. A laboratory study was performed to examine the effect of an applied stress on a fracture network and the intersection geometry. 3D printing...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-119
... 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...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-135
... ABSTRACT: Understanding the propagation of Mode I fracture is crucial in rock mechanics since this fracture mode is the predominant cause of catastrophic failures in brittle rock-like solids. For investigating the mechanisms of rock fracturing, Acoustic Emission (AE) is a widely accepted tool...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-171
... ABSTRACT: Fragmental rockfall is one kind of common geological disaster in mountainous areas. In this paper, the discrete element method, particle flow code (PFC) is used to simulate the impact and fracture process of rock mass, analysis the impact process of rock mass at different falling...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-460
... geomechanics cavern france government natural gas storage netherlands government geological subdiscipline hydrocarbon mpa conversion steel liner fracture criterion deformability johansson heterogeneously underground storage deformation cavern diameter hydrogen hydrogen storage diameter...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-452
... ABSTRACT: A direct shear equipment for testing rock fractures up to 400×600 mm size, and up to 5 MN force in both normal and shear loading directions, was developed. Normal loading and direct shear tests under constant normal stiffness (CNS) and constant normal load (CNL) conditions were...
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 non-ubiquitous 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-2023-040
... ABSTRACT: In the exploitation of shale gas and enhanced geothermal energy, reservoir water storage and carbon dioxide storage projects, induced earthquakes are closely related to the activity of primary faults. A fractured cylinder sample with 60° inclination is adopted in the indoor test...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-037
... ABSTRACT: An enhanced geothermal system that uses carbon dioxide (CO 2 ) for both reservoir creation and thermal energy extraction has been attracting attention in Japan. For this system, CO 2 fracturing is conducted to create highly permeable fractures in low-permeability reservoirs...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-041
... is the rocks toughness against fracture propagation. Hence, analogs to the reservoir rocks are subject to Semi-circular Bend tests to determine the required energy for tensile fractures (mode I) and accordingly Double-edge Notched Brazilian Disk tests for shear fractures (mode II). The subsequent finite...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-045
... ABSTRACT: Enhanced Geothermal Systems (EGS) use hydraulic fracturing to create a fracture network that facilitate the circulation of water between injection and extraction boreholes. Microseismic monitoring provides a unique method for the evaluation of the effectiveness and impact...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-053
... approach to hazard control by introducing blast-induced fractures to the rockmass. Introducing fractures softens the rockmass and reduces potential stored strain energy. This paper explores a case study where a large-magnitude rockburst occurred in the floor of a mine tunnel located approximately 2km below...

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