Zobrazeno 1 - 10
of 4 998
pro vyhledávání: '"The principal stress"'
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-19 (2024)
Abstract The stress disturbances induced by deep tunnel excavation are a key factor leading to the instability and failure of surrounding rock. To investigate the stress evolution in surrounding rock, this study utilizes a physical simulation system
Externí odkaz:
https://doaj.org/article/219c555669234a518ec98f009d0c6fc6
Publikováno v:
Journal of Rock Mechanics and Geotechnical Engineering, Vol 16, Iss 12, Pp 5193-5208 (2024)
Previous studies on the hollow cylinder torsional shear test (HCTST) have mainly focused on the macroscopic behavior, while the micromechanical responses in soil specimens with shaped particles have rarely been investigated. This paper develops a num
Externí odkaz:
https://doaj.org/article/8d93d027df9240f685d34061f10a62f7
Publikováno v:
Alexandria Engineering Journal, Vol 107, Iss , Pp 591-613 (2024)
The safety and stability during the excavation and production of the tunnel is a key issue that must be addressed in tunneling engineering, which is pronounced under principal stress re-orientation. A mechanical model is therefore developed to determ
Externí odkaz:
https://doaj.org/article/47065ef15d8b46c9a299ec9690ce2bb0
Publikováno v:
Journal of Rock Mechanics and Geotechnical Engineering, Vol 16, Iss 10, Pp 3870-3884 (2024)
To achieve the loading of the stress path of hard rock, the spherical discrete element model (DEM) and the new flexible membrane technology were utilized to realize the transient loading of three principal stresses with arbitrary magnitudes and orien
Externí odkaz:
https://doaj.org/article/0c6f12ef7a40413dadf25b9e3d455f2a
Publikováno v:
Journal of Rock Mechanics and Geotechnical Engineering, Vol 16, Iss 10, Pp 4300-4318 (2024)
This paper aims to investigate the role of bi-directional shear in the mechanical behaviour of granular materials and macro-micro relations by conducting experiments and discrete element method (DEM) modelling. The bi-directional shear consists of a
Externí odkaz:
https://doaj.org/article/e7ecf350702f44e183e3e8a7d2446ae6
Publikováno v:
Journal of Rock Mechanics and Geotechnical Engineering, Vol 16, Iss 9, Pp 3544-3557 (2024)
During the construction and operation of gas storage reservoirs, changes in the principal stress direction can induce fracture propagation under conditions of lower differential stress, potentially leading to failure in the surrounding rock. However,
Externí odkaz:
https://doaj.org/article/45eab64c303d45388991b9b661feb172
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-15 (2024)
Abstract The plastic flow behavior of soft rock exhibits non-coaxial features under complex stress paths, while traditional plasticity theories are ill-equipped to adequately represent this, which leads to the mechanism of soft rock failure still unc
Externí odkaz:
https://doaj.org/article/33190a8a11244745b822eb3c0e00f018
Publikováno v:
Journal of Rock Mechanics and Geotechnical Engineering, Vol 16, Iss 8, Pp 3149-3164 (2024)
To understand the strengths of rocks under complex stress states, a generalized nonlinear three-dimensional (3D) Hoek‒Brown failure (NGHB) criterion was proposed in this study. This criterion shares the same parameters with the generalized HB (GHB)
Externí odkaz:
https://doaj.org/article/7421a8af574a472eaf06e66cbe90e108
Publikováno v:
Shiyou shiyan dizhi, Vol 46, Iss 4, Pp 674-682 (2024)
The complex tectonic stress in the Shunbei area of the central Tarim Basin results in varied patterns of multilayered fractures. When drilling into the Silurian fracture zone and the formation pressure is lower than the drilling fluid column pressure
Externí odkaz:
https://doaj.org/article/75d96e52416140b697ca02fdca8c8341
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-16 (2024)
Abstract Deep rock are often in a true triaxial stress state. Studying the impacts of varying unloading speeds on their strain energy (SE) density is highly significant for predicting rock stability. Through true triaxial unloading principal stress e
Externí odkaz:
https://doaj.org/article/b622f18380e14abca71677d546ab40d8