- Title
- Characterizing shear stiffness of bedding parallel fractures for sedimentary rocks
- Creator
- Lines, Adam; Thoeni, Klaus; Buzzi, Olivier; Giacomini, Anna
- Relation
- New Challenges in Rock Mechanics and Rock Engineering. Proceedings of the ISRM European Rock Mechanics Symposium (Alicante, Spain 15-19 July, 2024) p. 494-499
- Publisher Link
- http://dx.doi.org/10.1201/9781003429234-71
- Publisher
- CRC Press
- Resource Type
- conference paper
- Date
- 2024
- Description
- Shear stiffness is an important parameter governing deformation behaviour and stress distribution. However, its current use is inadequate for detailed models, particularly in sedimentary rocks. Most published shear stiffness data for sedimentary rocks are for joints at low normal stresses, with limited available at normal stresses above 1 MPa. Thispaper addresses this deficiency by presenting results from direct shear testing for bedding parallel fractures under high normal stress and implementing a recently proposed method to isolate fracture deformations, this method is then validated using several measurement methods. The shear stiffness of 18 samples from the Bowen Basin (QLD, Australia) was obtained for different values of applied normal stresses (1 to 8 MPa). The results show a strong positive correlation between applied normal stress and shear stiffness. The finding shighlight opportunities for improvement in current guidelines and emphasize the need for them to better reflect results and data processing protocols.
- Subject
- shear stiffness; sedimentary roccks; stresses; fracture deformations
- Identifier
- http://hdl.handle.net/1959.13/1517994
- Identifier
- uon:57207
- Identifier
- ISBN:9781003429234
- Language
- eng
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