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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
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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
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Precursors of Cyclic Loading and Unloading Sandstone Failure Based on “Acoustic-Thermal” Loading–Unloading Response Ratio

Sustainability, 2023
Coal mining often causes periodic disruption in the rock mass around the stope. The study of the deformation and failure characteristics of cyclic loading and unloading sandstone is very critical for gaining a thorough understanding of the mechanisms of rock damage, degradation, and failure. This kind of investigation is very helpful in determining the
Hao Xu, Liqiang Ma, Kewang Cao, Naseer Muhammad Khan, Sajjad Hussain, Dongdong Niu, Saad S. Alarifi, Sher Bacha   +7 more
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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
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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
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Variation law of coal permeability under cyclic loading and unloading [PDF]

Thermal Science, 2019
In the excavation process, the coal pillar will undergo shear failure due to repeated loading and unloading from mining stress. Meanwhile, plastic flow will occur after shear failure. The permeability change of the coal pillar under plastic flow is closely related to the loading path.
Jingna Guo, Jiangfeng Liu, Qiang Li, Chen Xu, Zhanqing Chen, Bingxiang Huang, Shuliang Chen   +6 more
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Mechanical and hydraulic properties of fault rocks under multi-stage cyclic loading and unloading

International Journal of Coal Science & Technology, 2023
The rock mass in fault zones is frequently subjected to cyclic loading and unloading during deep resource exploitation and tunnel excavation. Research on the mechanical and hydraulic characteristics of fault rock during the cyclic loading and unloading ...
Wentao Hou, Dan Ma, Qiang Li, Jixiong Zhang, Yong Liu, Chenyao Zhou   +5 more
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Analysis of Energy Evolution and Acoustic Emission Characteristics of Rocks under Cyclic Loading and Unloading

Applied Sciences, 2023
This paper presents two experimental schemes, graded cyclic loading and unloading, and variable lower limit cyclic loading and unloading, to investigate the energy evolution and acoustic emission characteristics of rocks under different cyclic loading ...
Zhushuai Wang, Yu Yang, Yu Xu, Changhao Xin, Pengfei Liang, Ning Guo   +5 more
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