Study on physical and dynamic splitting mechanical properties of temperature-water coupled sandstone

Qi, Peng; Ping, Qi; Wang, Chen; Wu, Yulin; Zhang, Chuanliang; Qi, Dezhi; Diao, Qi; Zang, Long; Su, Zhiqiang

doi:10.1088/1755-1315/861/4/042077

Cited by 4 publications

(1 citation statement)

References 1 publication

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“…Wang et al [2] investigated the energy dissipation characteristics of fully saturated coal samples during the impact process and concluded that their energy density and incident energy were all positively correlated as a linear function. Ping et al [3] studied the kinetic properties of annular sandstone samples after temperature-water coupling treatment and then analyzed their stress balance and energy change rules. Wang et al [4] analyzed the tensile strength of rocks under different temperatures and water contents, concluding that the dynamic tensile strength of rocks changes in the opposite direction when the temperature and water content reach critical values.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Dynamic and Static Combined Dynamics of Temperature–Water-Coupled Sandstone and Energy Consumption Analysis

Ping,

Hu,

et al. 2024

Applied Sciences

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In order to study the dynamic properties of temperature–water-coupled sandstone under axial pressure, impact compression tests were carried out on sandstone samples after temperature–water coupling under eight types of axial pressure (0.5~4.0 MPa) loading as well as no axial pressure loading by using the split-Hopkinson pressure bar (SHPB) test set. The results showed that the mass, volume, and density of the sandstone specimens increased by 0.57%, 0.37%, and 0.20%, respectively, after temperature–water coupling. With increasing axial pressure, the dynamic compressive strength of temperature–water-coupled sandstone samples decreased as a linear function, the dynamic strain increased as a quadratic function, the dynamic modulus of elasticity decreased as a quadratic function, and the average strain rate increased as an exponential function, indicating a strong strain rate effect. From the energy point of view, as the axial pressure increases, the absorption energy of the sample increases, the reflection energy gradually decreases, the crushing degree of the sample increases, and the size of the broken pieces decreases; the average particle size of the sandstone sample pieces decreases quadratically with the increase in the absorption energy and linearly with the increase in the axial pressure.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on Dynamic and Static Combined Dynamics of Temperature–Water-Coupled Sandstone and Energy Consumption Analysis

Ping,

Hu,

et al. 2024

Applied Sciences

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Dynamic impact properties of deep sandstone under thermal-hydraulic-mechanical coupling loads

Cao,

Ding,

Zou

2024

J. Mt. Sci.

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Study on the Dynamic Splitting Mechanical Properties of Annular Sandstone Specimens with Temperature–Water Coupling in a Coal Mine

Ping

Wang

et al. 2022

Applied Sciences

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With the gradual deepening of mine excavation depth, the strong disturbance of deep strata becomes more and more obvious. Rock’s failure under blasting mainly depends on its dynamic tensile strength. The changes in rock’s dynamic properties are obviously affected by temperature and water. In order to study the dynamic tensile properties of annular sandstone specimens under the influence of temperature and water, deep sandstone was drilled, followed by water bath tests at eight temperatures (25~95°C). It can be seen from the analysis of test results that the mass and volume growth rates of the annular and the intact sandstone specimens first increased and then decreased, while the density growth rate first decreased and then increased. The mass and volume growth rates of the annular sandstone specimens were smaller, but the density growth rate was larger. Because of the increase in water temperature, the dynamic compressive strength first increased and then decreased. The dynamic tensile strength of the annular sandstone specimen was lower. The average strain rate and peak strain also showed a quadratic function relationship of first decreasing and then increasing with the increase in water temperature. The average strain rate of the annular sandstone specimen was smaller, but the peak value changed greatly. The Brazilian disc validity condition is applicable to two failure conditions of sandstone specimens. Through XRD and SEM analysis, we found that the changes in the dynamic properties of sandstone specimens were not due to their own material composition, but to the damage to their structure caused by the temperature–water coupling effect.

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Study on physical and dynamic splitting mechanical properties of temperature-water coupled sandstone

Cited by 4 publications

References 1 publication

Experimental Study on Dynamic and Static Combined Dynamics of Temperature–Water-Coupled Sandstone and Energy Consumption Analysis

Experimental Study on Dynamic and Static Combined Dynamics of Temperature–Water-Coupled Sandstone and Energy Consumption Analysis

Dynamic impact properties of deep sandstone under thermal-hydraulic-mechanical coupling loads

Study on the Dynamic Splitting Mechanical Properties of Annular Sandstone Specimens with Temperature–Water Coupling in a Coal Mine

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