Results 21 to 30 of about 1,146,381 (249)

Permeability evolution of fractured coal subject to confining stress and true triaxial stress loading: experiment and mathematical model

open access: yesFrontiers in Earth Science
The accurate elucidation and prediction of coal permeability evolution under stress loading conditions are crucial for coalbed methane production. In this study, flow experiments were conducted on six cylindrical coal samples and four cubic coal samples ...
Xiaobo Huang   +7 more
doaj   +2 more sources

Experimental study on the mechanical and failure behaviors of deep rock subjected to true triaxial stress: A review

open access: yesInternational Journal of Mining Science and Technology, 2022
It has become an inevitable trend of human development to seek resources from the deep underground. However, rock encountered in deep underground engineering is usually in an anisotropic stress state (σ1>σ>σ3) due to the influences of geological ...
Heping Xie   +4 more
doaj   +1 more source

Experimental study on failure evolution mechanism of clastic rock considering cementation and intermediate principal stress

open access: yesJournal of Rock Mechanics and Geotechnical Engineering, 2023
The study of clastic rock failure evolution under true triaxial stress is an important research topic; however, it is rarely studied systematically due to the limitation of monitoring technology.
Feiyan Wang   +3 more
doaj   +1 more source

A novel true triaxial test system for microwave-induced fracturing of hard rocks

open access: yesJournal of Rock Mechanics and Geotechnical Engineering, 2021
This study introduces a test system for microwave-induced fracturing of hard rocks under true triaxial stress. The test system comprises a true triaxial stress loading system, an open-ended microwave-induced fracturing system, a data acquisition system ...
Xia-Ting Feng   +6 more
doaj   +1 more source

Acoustic Emission Characteristics of Fracture and Damage in Coal Samples under Overstress Loading and Unloading Paths

open access: yesLithosphere, 2022
As coal mining depth is over 1000 m, an overstressed effect is commonly observed around working face which shows a higher stress than the ultimate strength of the coal mass.
Guang-an Zhu   +4 more
doaj   +1 more source

Experimental study on impact dynamics and failure characteristics of coal specimen under true triaxial conditions

open access: yesMeitan xuebao, 2023
Deep coal is mostly in a three-dimensional unequal stress state. In order to study the dynamic characteristics of coal under impact load, the dynamic failure mechanics experiment of coal was carried out by true triaxial Hopkinson experimental system ...
Rongxi SHEN   +5 more
doaj   +1 more source

Investigation of the influence of intermediate principal stress on the dynamic responses of rocks subjected to true triaxial stress state

open access: yesInternational Journal of Mining Science and Technology, 2021
Precisely understanding the dynamic mechanical properties and failure modes of rocks subjected to true triaxial stress state (σ1 > σ2 > σ3, where σ1, σ2, and σ3 are the major principal stress, intermediate principal stress, and minor principal stress ...
Wei You   +4 more
doaj   +1 more source

Experimental study on strength and failure characteristics of mortar specimens with prefabricated cracks under uniaxial and triaxial stress

open access: yesFrontiers in Materials, 2023
Cracks in rock masses have adverse effects on their mechanical characteristics and the stability of rock mass engineering. For this experiment, uniaxial compression and true triaxial compression unloading tests were conducted on mortar specimens.
Xuwei Pan   +4 more
doaj   +1 more source

Experimental Study on the Strength and Deformation Characteristics of Concrete under True Triaxial Compression after Sulfate Attack

open access: yesAdvances in Civil Engineering, 2021
To explore the mechanical properties of concrete under true triaxial static compressive load after sulfate attack, uniaxial static compression test and true triaxial static compression test at four stress ratios were carried out on concrete specimens ...
Wei Xia, Erlei Bai, Jinyu Xu, Gaojie Liu
doaj   +1 more source

Simulation of thermal creep under true triaxial conditions based on TTS constitutive model

open access: yesShenzhen Daxue xuebao. Ligong ban, 2023
Monotonic and cyclic thermal loading significantly affect the axial and radial deformation, and lateral pressure coefficient of soil under true triaxial conditions, which poses new challenges to the crack resistance, settlement control and bearing ...
LIU Ziqi, CHENG Xiaohui
doaj   +1 more source

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