Effect of true triaxial principal stress unloading rate on strain energy density of sandstone [PDF]
Scientific ReportsDeep 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.
Zhixi Liu +3 more
doaj +3 more sources
Verification of a novel stress path method by true-triaxial test [PDF]
Scientific ReportsTo verify the novel method of achieving a true-triaxial stress path with the pseudo-triaxial apparatus, a series of drained and undrained tests were carried out for the identical scheme with pseudo-triaxial apparatus and true-triaxial apparatus ...
Zhigang Ma, Xuefeng Li, Longlong Lv
doaj +3 more sources
Study of the mechanical characteristics of coal-serial sandstone after high temperature treatment under true triaxial loading [PDF]
Scientific Reports, 2023 In this study, a series of true triaxial loading tests were carried out on coal-measure sandstone after high temperature treatment by using a self-developed true triaxial test system combined with acoustic emission (AE) monitoring, and the mass loss ...
Shuai Wang +5 more
doaj +2 more sources
A true triaxial strength criterion for rocks by gene expression programming [PDF]
Journal of Rock Mechanics and Geotechnical Engineering, 2023 Rock strength is a crucial factor to consider when designing and constructing underground projects. This study utilizes a gene expression programming (GEP) algorithm-based model to predict the true triaxial strength of rocks, taking into account the ...
Jian Zhou +3 more
doaj +3 more sources
True-Triaxial Drained Test of Tengger Desert Sand [PDF]
Advances in Civil Engineering, 2020 For the lack of accurate test results in design and maintenance of desert-crossing highways in the Tengger Desert of western China, the GDS true-triaxial system was used to conduct the drained test on dense sand.
Xuefeng Li +3 more
doaj +2 more sources
A study on the influences of a hygrothermal environment on the compressive strength and failure criteria of asphalt mixtures based on true triaxial tests [PDF]
Heliyon, 2022 Based on a high-pressure servo static and dynamic true triaxial test machine (tawz-500/300), uniaxial and true triaxial tests of AC-25C asphalt mixtures under different heat moisture coupling treatments were performed, and the triaxial compressive ...
Pan Wang +4 more
doaj +2 more sources
Experimental study of true triaxial high pressure subcritical water impact fracturing. [PDF]
Sci Rep, 2023 AbstractA new fluid alternative to slick water for fracturing shale gas can reduce the waste of water resources and improve the extraction efficiency, enabling volumetric fracturing. For the new fracturing technique, the experiments of different release pressures under pre-injection and for pre-injection were conducted using a self-designed true ...
Hu S, Wang X, Wang E.
europepmc +4 more sources
True Triaxial Strength Testing of Sandstones [PDF]
Proceedings, 2013 Laboratory rock mechanical tests allow estimation of rock strength and deformation behaviour under stress states similar to the in-situ conditions. In general, the in-situ stresses are described by three principal stresses, the vertical, maximum and minimum horizontal stresses.
H. Jafary Dargahi +3 more
openaire +3 more sources
Influence of principal stress effect on deformation and permeability of coal containing beddings under true triaxial stress conditions [PDF]
Royal Society Open Science, 2019 In situ stress is generally an anisotropic/true triaxial stress (σ1 > σ2 > σ3). Bedding weakens the continuity and integrity of coal. It is critical to understand the mechanical behaviour and gas migration of coal under true triaxial stress conditions ...
Jiahui Dai +3 more
doaj +2 more sources
Failure and deformation characteristics of shale subject to true triaxial stress loading and unloading under water retention and seepage [PDF]
Royal Society Open Science, 2022 A multi-functional true triaxial fluid-structure coupling system was used to conduct water retention and seepage tests of shale under true triaxial loading and unloading stress paths.
Shujian Li +4 more
doaj +2 more sources