Effects of stress path on shear strength of a rock salt

Artkhonghan, Kiattisak; Sartkaew, Suratwadee; Thongprapha, Thanittha; Fuenkajorn, Kittitep

doi:10.1016/j.ijrmms.2018.02.014

Cited by 3 publications

(4 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Conjugate shear bands were generated in the hard-veined models ( Figure 9) in PC; similar observations were also made in laboratory experiments on intact rocks (Artkhonghan et al, 2018;Crawford et al, 1995;Ma et al, 2016).…”

Section: Comparison Of Results With Previous Findings and Implicationsupporting

confidence: 80%

“…Journal of Geophysical Research: Solid Earth SHANG observations (Ma et al, 2016). In TT (Figure 3a, μ = −1), multiple subhorizontal fracture planes were induced in the model, which qualitatively matches with that observed in Artkhonghan et al (2018).…”

Section: 1029/2019jb019052supporting

confidence: 77%

“…Three stress conditions were documented in the literature, which include TC (σ 1 > σ 2 = σ 3 ), PC (σ 1 > σ 2 > σ 3 ), and triaxial extension (TT; σ 1 = σ 2 > σ 3 ). The Lode parameter (μ) was used to quantitatively correlate the three principal stresses and describe the three stress conditions (Artkhonghan et al, 2018;Riley et al, 2006),…”

Section: Polyaxial Test Setupmentioning

confidence: 99%

“…Although the importance of σ 2 has been known for more than 50 years, previous polyaxial experiments mainly dealt with intact rocks (Artkhonghan et al, 2018;Crawford et al, 1995;Feng et al, 2019;Mogi, 1967;Haimson, 2006;Hecker & Petrovic, 1981;Ma & Haimson, 2016). So far, no previous publications, at least to the best of the author's knowledge, have ever addressed the questions associated with the geomechanical response of veined rock in PC.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Rupture Of Veined Granite In Polyaxial Compression: Insights From Three‐Dimensional Discrete Element Method Modeling

Shang

2020

JGR Solid Earth

View full text Add to dashboard Cite

Granite formations have been frequently involved in subsurface energy‐related activities such as radioactive waste disposal, oil, and gas storage. This is principally because of their mechanical stability, low permeability, and high corrosion resistance. These favorable properties, however, can be compromised by the addition of mineral veins, which tend to occur ubiquitously in upper crustal rock formations. Evaluation of the impact of veins on the integrity and rupture characteristics of granite, especially under true triaxial stresses, is therefore important yet currently underemphasized. This study examines the rupture of veined granite in polyaxial compression via a discrete element method model. In the model with soft veins, the rupture is localized along the fabricated inclined veins (45° relative to the horizontal with strike running in the σ2 direction) under low confining stresses (σ2 < 67 MPa); in contrast, a combined rupture of veins and granite matrix is observed when σ2 is increased to 141.6 MPa. Shear sliding along the inclined veins is revealed by examining the displacement field. Shear‐induced volumetric dilation is suspected in the soft‐veined models in relatively low confining stresses (σ2 < 67 MPa) with sliding and dilation behavior apparently suppressed at σ2 = 141.6 MPa. Hard veins impede local rupture, resulting in conjugate shear bands. The well‐recognized σ2 effect is observed for the hard‐veined models, while no pronounced σ2 effect is noticed for the soft‐veined models. This study also reveals that vein thickness has a negligible impact on rupture characteristics, which is however profoundly affected by vein orientation.

show abstract

Section: Comparison Of Results With Previous Findings and Implicationsupporting

confidence: 80%

Section: 1029/2019jb019052supporting

confidence: 77%

Section: Polyaxial Test Setupmentioning

confidence: 99%