Results 1 to 10 of about 6,606 (195)

Determination method of fatigue strength and precursors of fatigue failure of porous weakly cemented siltstone

Meitan xuebao, 2023
In order to study the fatigue behavior of porous weakly cemented siltstone, a quantitative calculation method of characteristic stress was established based on uniaxial step loading and unloading tests of siltstone.
Mingchun LIANG, Shengjun MIAO, Meifeng CAI, Zhengjun HUANG, Hui WANG   +4 more
doaj   +1 more source

Study on bump-prone property of coal under multi-stage confining pressure variable stress lower limit cyclic loading and unloading

Meikuang Anquan, 2023
The study of coal bump-prone property under confining pressure plays a key role in exploring the formation mechanism of coal burst in deep underground mines.
Chuanjiu ZHANG, Taotao DU, Jianhui REN, Xuanliang LI   +3 more
doaj   +1 more source

Experimental Investigation on the Behavior of Gravelly Sand Reinforced with Geogrid under Cyclic Loading

Applied Sciences, 2021
In view of the dynamic response of geogrid-reinforced gravel under high-speed train load, this paper explores the dynamic characteristics of geogrid-reinforced gravel under semi-sine wave cyclic loading. A number of large scale cyclic triaxial tests were
Jia-Quan Wang, Zhen-Chao Chang, Jian-Feng Xue, Zhi-Nan Lin, Yi Tang   +4 more
doaj   +1 more source

Experimental Study on the Failure Characteristics and Damage Evolution of Sandstones from Typical Buried Depths in High In Situ Stress Area

Lithosphere, 2022
This study is aimed at exploring the mechanical properties and failure characteristics of the rocks surrounding a railway tunnel in Qinghai-Tibet Plateau at typical buried depths.
Yi-hang Li, He-ping Xie, Gan Feng, Ru Zhang, Guang-ze Zhang, Zheng-xuan Xu, Tao Feng, Dong Wang, Xiao-juan Yi, Ming-hao Chen, An-lin Zhang, Zhi-long Zhang, Li Ren   +12 more
doaj   +1 more source

Critical Dynamic Stress and Cumulative Plastic Deformation of Calcareous Sand Filler Based on Shakedown Theory

Journal of Marine Science and Engineering, 2023
Calcareous sand is a special marine soil rich in calcium carbonate minerals, characterized by brittle particles. It is, therefore, widely used as a filling material in the construction of islands and reefs.
Kangyu Wang, Zhenhuan Chen, Zhe Wang, Qianshen Chen, Dihui Ma   +4 more
doaj   +1 more source

Experimental Study on Coal Specimens Subjected to Uniaxial Cyclic Loading and Unloading

Applied Sciences, 2022
The paper represents a test investigation of the mechanical properties and acoustic emission (AE) characteristics of low-strength coal specimens subjected to cyclic loading and unloading. From the lab tests, the following conclusions can be obtained: (1)
Mingtao Gao, Hongyu Yan, Huiqiang Duan, Si Xiong   +3 more
doaj   +1 more source

Influence of loading and heating processes on elastic and geomechanical properties of eclogites and granulites

Journal of Rock Mechanics and Geotechnical Engineering, 2018
Increased knowledge of the elastic and geomechnical properties of rocks is important for numerous engineering and geoscience applications (e.g. petroleum geoscience, underground waste repositories, geothermal energy, earthquake studies, and hydrocarbon ...
Hem Bahadur Motra, Sascha Zertani
doaj   +1 more source

Expansive Soil Crack Depth under Cumulative Damage

The Scientific World Journal, 2014
The crack developing depth is a key problem to slope stability of the expansive soil and its project governance and the crack appears under the roles of dry-wet cycle and gradually develops.
Bei-xiao Shi, Sheng-shui Chen, Hua-qiang Han, Cheng-feng Zheng   +3 more
doaj   +1 more source

Why Coal Bed Methane (CBM) Production in Some Basins is Difficult

Energies, 2019
The changes in the permeability of coal-bed reservoirs with methane, as associated with gas depletion, are the consequence of two opposing processes, namely geomechanical compaction that narrows down fractures, and matrix shrinkage, which, in turn ...
Andrzej Olajossy, Jerzy Cieślik
doaj   +1 more source

Experimental study on freezing deformation characteristics of unsaturated expansive soils considering cyclic freeze-thaw and initial anisotropy

Yantu gongcheng xuebao
The swelling and shrinkage deformation of the expansive soils in seasonally frozen regions is significant, which seriously induces engineering hazards and disasters.
ZHANG Siyu 1, 2, ZHANG Yonggan 1, 3, 4, LU Yang 1, 4, LIU Sihong 1, 4
doaj   +1 more source