Effect of Confining Pressure on the Damage Evolution and Failure Behaviors of Intact Sandstone Samples During Cyclic Disturbance

Chen, Xu; Tang, Minggao; Tang, Chun’an

doi:10.1007/s00603-021-02672-z

Cited by 16 publications

(5 citation statements)

References 49 publications

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“…As the most economically viable option for reducing emissions of carbon dioxide to the atmosphere, the long-term safety of underground engineering for the long-term geological storage of the greenhouse gas is extremely important (Al-Ameri et al, 2016;Lu et al, 2019;Xu et al, 2021), however, these underground engineering works are likely to be subjected to earthquakes during their service lives (Liu et al, 2018). Similar problems will be encountered for rock slopes (Aydan 2016;Huang et al, 2018;Huang et al, 2020;Chang et al, 2022;Du et al, 2022;Fu et al, 2022). Thus, it is crucial to characterize the mechanical behavior of the rock surrounding such works under seismic loads.…”

Section: Introductionmentioning

confidence: 62%

“…Furthermore, triaxial cyclic loading tests have been conducted to study the influence of confining pressure on the mechanical properties of rock materials (Yang et al, 2020;Jiang et al, 2021;Yang et al, 2021). Chen et al (2021) applied five different confining pressures in triaxial cyclic loading tests on intact sandstone to expound the damage evolution and failure behavior. Experimental results show that the confining pressure can stop the formation and propagation of fractures in rock samples and reduces damage thereto.…”

Section: Introductionmentioning

confidence: 99%

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The influences of seismic load on dynamic deformation properties of rock material under different confining pressures

Zhou

Yuan²,

Song³

et al. 2023

Front. Earth Sci.

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Long-term geological storage of carbon dioxide in underground engineering is the most economically viable option for reducing emissions of this greenhouse gas to the atmosphere. Underground engineering projects are often subjected to earthquakes during their lives, thus it is essential to investigate the deformation characteristics of surrounding rock of those underground engineering works subjected to seismic load under different confining pressures. To date, however, there have been notably few studies on the characteristics of rock materials under seismic load and the influences of seismic load on dynamic deformation properties of rock material under different confining pressures remain unclear. Therefore, a numerical study of the dynamic mechanical properties of a rock material (T2y6 marble) under Kobe seismic load with four different maximum stresses and four different confining pressures was conducted. The results show cyclic behavior, strain rate effect and damage are found in the stress-strain curves of the rock under simulated Kobe seismic load. Confining pressure can significantly limit the increases in lateral strain and volumetric strain, thus dilation can occur in the rock when the maximum stress of seismic load is large, and the confining pressure is small. Seismic load with small maximum stress cannot cause severe damage to the rock, but the influence is larger than that of static load. The maximum stress can be treated as a main factor affecting the damage to rock under seismic loads, while the effect of confining pressure thereon is smaller than that of the maximum stress. Furthermore, the relationships between deformation characteristics of the rock under these seismic loads, such as maximum strain, residual strain, plastic internal variable, deformation modulus, and maximum stress are different from that between the deformation characteristics and confining pressure.

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Section: Introductionmentioning

confidence: 62%

Section: Introductionmentioning

confidence: 99%

The influences of seismic load on dynamic deformation properties of rock material under different confining pressures

Zhou

Yuan²,

Song³

et al. 2023

Front. Earth Sci.

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show abstract

“…The development trend of the 3‐D test machine can be divided into two steps. First, it mainly focuses on the conventional triaxial instrument design and modifications, such as in the studies by Li et al (2017, 2008), Chen et al (2022), and Xu and Zhang (2017). Next, the true triaxial dynamic instrument is developed and improved to explore deep rock behaviors, such as in the research work of Xie et al (2020, 2021), He et al (2021), Feng et al (2019b), and Su et al (2017).…”

Section: The Main Existing Dynamic Triaxial Instruments For Deep Rocksmentioning

confidence: 99%

“…Many other applications of the second‐generation instrument were attempted in this study by the research team, but due to the space constraint, only a partial introduction is presented in this article. The details can be obtained from the literature (Chen et al, 2022; Yu et al, 2021, 2022; Zhu et al, 2021).…”

Section: Second Upgradation Of the Quasi‐dynamic Triaxial Instrumentmentioning

confidence: 99%

Development and applications of the quasi‐dynamic triaxial apparatus for deep rocks

Luo,

Cai,

et al. 2023

Deep Underground Science and Engineering

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The mechanical behaviors of deep rocks have always posed a challenge for the implementation and safe operation of major underground engineering projects. To this end, this study modified the existing mainstream rock mechanics instruments equipped with a dynamic disturbance loading system and developed a second‐generation TFD‐2000/D triaxial instrument. The first‐generation device is equipped with an independent disturbance system and an advanced EDC‐580 all‐digital servo controller, which can apply disturbing load independently, implement the function of cyclic disturbance, and combine dynamic and static disturbances. The instrument was found to be reliable for use in analyzing the damage process of rocks in the disturbance test of marbles. The second‐generation instrument tackles three limitations of the first‐generation instrument: (i) it upgrades the strain measurement system and uses extensometers with linear variable differential transformers to accurately measure deformation; (ii) it uses the self‐balanced chamber to replace the Hoek–Franklin triaxial cell and auto‐balancing triaxial pressure chamber; and (iii) the loading rod is independently equipped with an EDC‐580 all‐digital servo controller, which measures precise loads. The experimental findings confirmed that the second‐generation instrument can be used for rock mechanics testing under cyclic disturbance loading, the disturbance–stress relaxation cycle, and the creep–fatigue cycle. In this sense, the second‐generation instrument can be a useful addition to deep rock mechanical instruments and provide a valuable reference.

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“…By substituting equation ( 13) and equation ( 14) into the bifurcation set equation ( 16), the bifurcation set equation ( 17) of the cusp catastrophe (Chen et al 2021;Dong et al 2021) of the system can be obtained:…”

Section: The Rib Pillar Failure and Instability Model Based On The Cusp Catastrophe Theorymentioning

confidence: 99%

Stability Analysis of Rib Pillars in Highwall Mining Under Dynamic and Static Loads in Open-Pit Coal Mine

Chen

et al. 2021

Preprint

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The highwall miner can be used to mine the retained coal in the end slope of an open-pit mine. However, the instability mechanism of the reserved rib pillar under dynamic and static loads is not clear, which restricts the safe and efficient application of the highwall mining system. In this study, the load-bearing model of the rib pillar in highwall mining was established, the cusp catastrophe theory and the safety coefficient of the rib pillar were considered, and the criterion equations of the rib pillar stability were proposed. Based on the limit equilibrium theory, the limit stress of the rib pillar was analyzed, and the calculation equations of plastic zone width of the rib pillar in highwall mining were obtained. Based on the Winkler foundation beam theory, the elastic foundation beam model composed of the rib pillar and roof under the highwall mining was established, and the calculation equations for the compression of the rib pillar under dynamic and static loads were developed. The results show that with the increase of the rib pillar width, the total compression of the rib pillar under dynamic and static loads approximately decreases in an inverse function, and the compression of the rib pillar caused by static loads of the overlying strata and trucks has a decisive role. Numerical simulation and theoretical calculation were performed in this study. In the Numerical simulation, the coal seam with a buried depth of 122 m and a thickness of 3 m was mined by the highwall miner. According to the established rib pillar instability model of the highwall mining system, it is found that when the mining tunnel width is 3 m, the reasonable width of the rib pillar is at least 1.3 m, and the safety factor of the rib pillar is 1.3. The numerical simulation results are in good agreement with the results of theoretical calculation, which verifies the feasibility of the theoretical analysis of the rib pillar stability. The research results can provide an important reference for the stability analysis of rib pillars under highwall mining.

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Effect of Confining Pressure on the Damage Evolution and Failure Behaviors of Intact Sandstone Samples During Cyclic Disturbance

Cited by 16 publications

References 49 publications

The influences of seismic load on dynamic deformation properties of rock material under different confining pressures

The influences of seismic load on dynamic deformation properties of rock material under different confining pressures

Development and applications of the quasi‐dynamic triaxial apparatus for deep rocks

Stability Analysis of Rib Pillars in Highwall Mining Under Dynamic and Static Loads in Open-Pit Coal Mine

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