Experimental Study on Mechanical Properties, Permeability and Acoustic Emission Characteristics of Gypsum Rock Under THM Coupling

Lyu, Cheng; Liu, Jianfeng; Wu, Zhide; Liu, Hejuan; Xiao, Fukun; Zeng, Yonghu

doi:10.1007/s00603-021-02586-w

Cited by 22 publications

(2 citation statements)

References 50 publications

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“…Conventional triaxial compression tests, acoustic emission monitoring, and penetration tests are frequently combined in studies [30]. For the most part, these studies combine traditional triaxial compression, acoustic emission monitoring, and permeation tests to investigate the relationship between stress-strain and permeability, and acoustic emission characteristics and permeability, as well as to reveal the deformation properties, permeability revolution, and acoustic emission characteristics of different types of rocks [31][32][33][34]. Through an analysis and discussion of fine sandstone's permeability and acoustic emission properties throughout the damage process, it has been discovered that there is some correlation between permeability, acoustic emission parameters, stress, and volumetric strain [35,36].…”

Section: Introductionmentioning

confidence: 99%

A Study on the Permeability and Damage Characteristics of Limestone under Stress–Seepage Coupling Conditions

Wang,

Liu,

Liao

et al. 2023

Energies

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With the increase in energy demand, energy engineering has gradually developed to go deeper, accompanied by a complex geological environment, such as the coupling of stress and seepage. Limestone is widely found in underground rock engineering, and its stress–seepage coupling characteristics have a great influence on the safety and stability of related engineering projects. In order to study the permeability characteristics and damage evolution of limestone during the deformation and failure process under stress–seepage coupling conditions, permeability and acoustic emission tests on limestone were performed in this paper. The results showed that: the stress–strain curve demonstrated periodicity, as did the permeability change. The change in permeability in different deformation stages of axial strain and lateral strain was similar, but it was more appropriate to reflect the permeability evolution in terms of lateral strain. The permeability of the limestone slightly decreased in the volumetric compression stage, and tended to saturate after a sudden increase in the expansion stage. The presence of the confining pressure reduced the permeability of the rock. In the process of limestone deformation and failure, the level of acoustic emission activity can reflect the degree of fracture development. The permeability characteristics and acoustic emission characteristics had a good corresponding relationship. The greater the confining pressure, the higher the acoustic emission activity. The deformation and damage process of limestone experienced three stages: damage stable growth, damage acceleration development, and damage saturation.

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Section: Introductionmentioning

confidence: 99%

A Study on the Permeability and Damage Characteristics of Limestone under Stress–Seepage Coupling Conditions

Wang,

Liu,

Liao

et al. 2023

Energies

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“…Creep is the typical mechanical property of gypsum rock. Liu et al researched the creep characteristics of gypsum rock and its stability through uniaxial compression experiments and the step loading test [13][14][15]. A large number of other scholars have also carried out research work on the collapse hazard of gypsum mined gob based on different methods and perspectives [16,17].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Strength Weakening of Gypsum Rock with Effect of Long-Term Overlying Strata Pressure

et al. 2022

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A long time lag is the main characteristic of gypsum mined gob collapse disasters. With the coring of a gypsum rock specimen from the supporting pillars in gob, which formed over several years, the strength weakening effect of the gypsum rock with long-term overlying strata pressure is revealed by experimentation. The results show that: uniaxial compression stress–strain curves represent major differences in different lateral depths of the same supporting pillar. With the increase in lateral depth, peak strength increases and the corresponding strain decreases, which becomes more obvious as the age increases. As a function of time, peak strength decreases and the corresponding strain increases in the shallow part of the pillar as the age increases. Peak strength fluctuates in the middle part and increases in the deep part; the corresponding strain fluctuates in the middle and deep parts, but demonstrates the opposite changing law. Finally, the reason for the above law was comprehensively and thoroughly researched and demonstrated. The maximum strength weakening rate of gypsum rock in the shallow part of a supporting pillar of 0.5 m depth was 21.06% in the year 1996. The slow strength weakening effect of gypsum rock with long-term overlying strata pressure is the essential reason why gypsum mined gob collapses occur in subsequent years or even decades.

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Heating-Dominated Fracturing of Granite by Open-Ended Microwave: Insights from Acoustic Emission Measurement

Zheng

Gong

et al. 2022

Rock Mech Rock Eng

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Experimental Study on Mechanical Properties, Permeability and Acoustic Emission Characteristics of Gypsum Rock Under THM Coupling

Cited by 22 publications

References 50 publications

A Study on the Permeability and Damage Characteristics of Limestone under Stress–Seepage Coupling Conditions

A Study on the Permeability and Damage Characteristics of Limestone under Stress–Seepage Coupling Conditions

Experimental Study on Strength Weakening of Gypsum Rock with Effect of Long-Term Overlying Strata Pressure

Heating-Dominated Fracturing of Granite by Open-Ended Microwave: Insights from Acoustic Emission Measurement

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