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Study on the mechanical properties of unloading damaged sandstone under cyclic loading and unloading [PDF]

Scientific Reports, 2023
To reveal the mechanical properties of rocks under stress disturbance and unloading confining pressure, conventional triaxial compression tests, triaxial compression tests on unloading damaged sandstone, and cyclic loading and unloading tests on ...
Hengbin Zhang, Lehua Wang, Jianlin Li, Huafeng Deng, Xiaoliang Xu   +4 more
doaj   +4 more sources

Study on mechanical properties of sandstone damaged by blasting load under triaxial cyclic loading and unloading [PDF]

Scientific Reports
To investigate the changes in the strength and deformation of the blast load-damaged sandstone roof plate under cyclic loading and unloading conditions at different confining pressures, a triaxial loading device was used to carry out graded cyclic ...
Haibo Wang, Genshuo Zhu, Ziyi Lu, Qi Zong, Hao Wang   +4 more
doaj   +4 more sources

Study on Kaiser effect of granite under cyclic loading and unloading at different temperatures [PDF]

Scientific Reports
During the tunneling process in high-temperature environments, the surrounding rock mass is subjected to periodic pressurization and depressurization, making it prone to instability and failure.
Xiankai Bao, Shunjia Huang, Yongjun Lv, Yue Huang, Lizhi Wang, Xiaofan Zhang   +5 more
doaj   +4 more sources

Experimental study on the mechanical properties and deformation failure characteristics of sandstone under graded equal amplitude cyclic loading and unloading [PDF]

Scientific Reports
To investigate the effects of graded equal amplitude cyclic loading on rock deformation and failure, this study examines the influence of confining pressure and upper limit cyclic stress on the deformation parameters, stress–strain hysteresis curves, and
Zhiwei Ni, Jie Li, Ke Qin, Xiaogang Wu, Junxing Zhu, Shiming Zhou   +5 more
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Study on the failure and acoustic emission characteristics of coal under graded cyclic loading and unloading stress paths [PDF]

Scientific Reports
To study the influence of cyclic disturbance stress on the mechanical behavior of coal during mining, a gas containing coal fluid-solid coupling servo seepage experimental system was used to conduct experimental research on the acoustic emission (AE ...
Minke Duan, Meijuan Lu, Ruiqi Ban, Ke Yang, Xin Lyu, Changbao Jiang, Xuelong Hu, Jinzhou Tang   +7 more
doaj   +2 more sources

Mechanical properties and energy evolution characteristics of borehole-containing specimens under disturbances of cyclic incremental stress with different lower limits

Journal of Materials Research and Technology, 2023
Drilling gas drainage boreholes in coal mines is a major measure to prevent gas disasters in coal mines. However, coal mining disruptions can affect the stability and shape of gas drainage boreholes.
Xiaoyan Sun, Zihan Chen, Quanle Zou
doaj   +1 more source

Damage Characteristics and Energy Evolution of Bituminous Sandstones under Different Cyclic Amplitudes

Applied Sciences, 2023
In many underground engineering projects, rocks are often subjected to cyclic loading and unloading, such as repeated excavation of roadway surrounding rock, which will lead to damage to underground rocks, and the energy of rocks also changes. Therefore,
Xiaoyu Lu, Ruipeng Qin, Chunliang Dong, Chaotao Fan   +3 more
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Energy Analysis Method for Uniaxial Compression Test of Sandstone under Static and Quasi-Dynamic Loading Rates

Advances in Materials Science and Engineering, 2021
To investigate the energy evolution characteristics of sandstone under static-quasi-dynamic loading rates (1.0 × 10−3, 5.0 × 10−3, 1.0 × 10−2, 5.0 × 10−2, and 1.0 × 10−1 mm/s), the uniaxial compression tests, the uniaxial cyclic loading-unloading tests ...
Zhixi Liu, Guangming Zhao, Xiangrui Meng, Ruofei Zhang, Dong Chunliang, Wensong Xu   +5 more
doaj   +1 more source

Mechanical behaviour of medium-grained sandstones exposed to differential cyclic loading with distinct loading and unloading rates

Journal of Rock Mechanics and Geotechnical Engineering, 2022
This work aims to investigate the mechanical behaviour of medium-grained sandstones under cyclic loading with different loading/unloading rates. This type of cyclic loading is called differential cyclic loading (DCL) and is considered for testing rock ...
Zhengyang Song, Heinz Konietzky, Yunfeng Wu, Kun Du, Xin Cai   +4 more
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Effect of Cyclic Loading and Unloading on the Deformation and Damage Properties of Sandstone from Beizao, a Coal Mine underneath the Bohai Sea in China

Geofluids, 2022
Mining under the sea is a challenging task in China. Affected by blasting, tunneling, and other engineering disturbance, surrounding rock is often in a state of cyclic loading and unloading stress.
Yan Chen, Gaofei Wang, Lei Zhou, Guolong Zhang, Jiangfan Yang, Meiheng Li   +5 more
doaj   +1 more source