Results 51 to 60 of about 27,123 (217)

Effect of true triaxial principal stress unloading rate on strain energy density of sandstone

Scientific Reports
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.
Zhixi Liu, Guangming Zhao, Xiangrui Meng, Qingheng Gu   +3 more
doaj   +1 more source

State-dependent fractional plasticity model for the true triaxial behaviour of granular soil

Archives of Mechanics, 2019
The fractional plasticity was proposed to model the stress-strain behaviour of granular soils, but only within the scope of classical triaxial loading condition.
Y. Sun, W. Sumelka
doaj   +1 more source

Experimental Study of Strain Rockburst considering Temperature Effect: Status-of-the-Art and Prospect

Shock and Vibration, 2021
In deep mining and excavation of tunnels with high geothermal, the surrounding rock is not only subjected to high ground stress but also subjected to high temperature.
Lei Xu, Fengqiang Gong
doaj   +1 more source

Experimental study on rockburst fragment characteristic of granite under different loading rates in true triaxial condition

Frontiers in Earth Science, 2022
In order to study the effect of loading rate on rockburst, an indoor test of single-face fast unloading-three directions and five-face stress-vertical continuous loading is conducted under different loading rates using a new true-triaxial rockburst test ...
Feiyue Sun, Jiaqi Guo, Junqi Fan, Xiliang Liu   +3 more
doaj   +1 more source

Failure characteristics and the energy criterion of rock with a through‐going joint under true‐triaxial unloading conditions: Insights from the DEM model

Deep Underground Science and Engineering, EarlyView.
The rock failure mode is significantly influenced by the contributing factors, such as the joint inclination, the initial confining pressure, and the unloading point. We found six typical rock failure modes after a large number of numerical tests. Abstract Excavation unloading damages rock masses, with preferential failure along geological defects in ...
Fei Liu, Changhui Liang, Sijia Liu, Yongjun Zhang, Luo Wang   +4 more
wiley   +1 more source

Experimental study of the dynamic mechanical responses and failure characteristics of coal under true triaxial confinements

International Journal of Mining Science and Technology, 2023
Investigations on the dynamic mechanical properties and failure mechanisms of coal under in-situ stress is essential for the prevention of dynamic disasters in deep coal mines.
Zhanguo Ma, Pengfei Yan, Shixing Cheng, Peng Gong, Fuzhou Qi, Jianguo Wang   +5 more
doaj   +1 more source

Use of elastic stability analysis to explain the stress-dependent nature of soil strength [PDF]

, 2015
The peak and critical state strengths of sands are linearly related to the stress level, just as the frictional resistance to sliding along an interface is related to the normal force. The analogy with frictional sliding has led to the use of a ‘friction
Hanley, KJ, Huang, X, O'Sullivan, C, Wadee, MA   +3 more
core   +3 more sources

A review on rockburst prediction and prevention to shape an ontology‐based framework for better decision‐making for underground excavations

Deep Underground Science and Engineering, EarlyView.
A scientometric analysis of 2449 journal articles and a comprehensive review of 336 papers were conducted, discussing and identifying challenges and research gaps in rockburst prediction and prevention and proposing an ontology‐based framework for better decision‐making in underground excavations. Abstract With underground engineering projects becoming
Hongchuan Yan, Haijiang Li, Hongqiang Xie, Mingli Xiao, Jianliang Pei, Huaizhong Liu, Jiangda He   +6 more
wiley   +1 more source

Mechanical parameter evolutions and deterioration constitutive model for ductile–brittle failure of surrounding rock in high-stress underground engineering

Underground Space
The deep surrounding rock is usually in the true triaxial stress state, and previous constitutive models based on the understanding of uniaxial and conventional triaxial test results have difficulty characterizing the degradation and fracture process of ...
Zhi Zheng, Ronghua Li, Qiang Zhang, Xiaohua Huang, Wei Wang, Shuling Huang   +5 more
doaj   +1 more source

Unloading Mechanics and Energy Characteristics of Sandstone under Different Intermediate Principal Stress Conditions

Advances in Civil Engineering, 2021
The TRW-3000 true triaxial rock testing machine was used to conduct loading and unloading tests of sandstone under different σ2, and the true triaxial lateral unloading mechanics and energy characteristics of sandstone under different σ2 were studied ...
Yingjie Zhang, Jiangteng Li, Gang Ma, Shuangfei Liu   +3 more
doaj   +1 more source