Results 11 to 20 of about 31,902 (254)
Coupled effect of unloading rate and water content on mortar under differential cyclic loading. [PDF]
Sci RepRepeated excavation and fluctuations in water levels subject mortar to varying stress rates and moisture conditions; however, the coupling effects of these factors remain insufficiently studied. This research examines the combined influence of unloading rate and water content on the mechanical behavior of water-bearing mortar (WM) under multi-level ...
Liu Z +5 more
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Deformation and permeability of sandstone at different cycling loading-unloading rates
工程科学学报, 2017 In order to research the effect of cycling loading and unloading rates on the deformation and permeability of sandstone, cycling loading and unloading tests were performed with a self-made thermal-hydrological-mechanical coupling test system for gas ...
ZHAO Hong-gang +3 more
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Experimental Study on Influence of Unloading Rate on Creep Characteristics of Marble under High Stress [PDF]
E3S Web of Conferences, 2021 In the engineering of high stress area, the measures to control the stability of surrounding rock by reducing excavation footage and excavation speed are to adjust the unloading rate of surrounding rock caused by excavation.
He Huajun, Jin Huahui
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Energies, 2023 Conventional and cyclic unloading tests with different unloading rates were conducted to study the influences of unloading patterns and rates on the deformation characteristics and mechanical properties of tectonic coal.
Deyi Gao +4 more
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Advances in Materials Science and Engineering, 2021 In order to study the mechanical behaviors and fracture process properties of granite under confining pressure unloading with constant axial pressure, RMT-150B rock mechanics test system and acoustic emission detector were used to study the mechanical ...
Jiaqi Guo +4 more
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矿业科学学报, 2020 Slope excavation rate has an important influence on slope stability.It is of great significance to study the deformation and failure characteristics of locked high-steep rock slope under different excavation unloading rates and the failure mechanism of ...
Wang Jianming +4 more
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Meitan kexue jishu, 2023 For the rock burst disaster problems caused by unloading disturbance of deep roadway excavation, the study on the deformation and fracture mechanism of roadway surrounding rock under different unloading conditions was carried out.
Xiaochun XIAO +4 more
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Effect of unloading rate and pore water pressure on mechanical properties of sandstone
Yantu gongcheng xuebao, 2017 In order to study the effect of discharge load rate and pore water pressure on the mechanical properties of sandstone, the triaxial unloading tests with different unloading rates (0.005, 0.02, 0.05 and 0.1 MPa/s) and different osmotic pressures (0, 0.3 ...
DENG Hua-feng , WANG Zhe , LI Jian-lin , JIANG Qiao , ZHANG Heng-bin
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Mechanical Characteristics of Frozen Sandstone under Lateral Unloading: An Experimental Study
Advances in Civil Engineering, 2021 The lateral unloading strength and deformation of surrounding frozen rock are the key parameters for safety evaluation of frozen shaft construction. A low-temperature and high-pressure rock triaxial test system was used to simulate freezing construction,
Shuai Liu +4 more
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Failure characteristics of Beishan granite under unloading confining pressures
Yantu gongcheng xuebao, 2019 To better understand the effects of unloading confining pressure on failure mechanism, several trial tests on loading axial stresses and unloading confining pressures with different unloading rates are performed, and acoustic emission events are recorded
WANG Chao-sheng 1, ZHOU Hong-wei 1, WANG Rui 1, WANG Zi-hui 1, HE Shu-sheng 1, LIU Jian-feng 2
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