The influence of temperature and time on water-rock interactions based on the morphology of rock joint surfaces

Wang, Fei; Cao, Ping; Cao, Rihong; Xiong, Xiaohui; Hao, Ji Ping

doi:10.1007/s10064-018-1315-5

Cited by 29 publications

(4 citation statements)

References 11 publications

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“…From the above analysis, it is also clear that in a saturated state (after 3, 3.5, and 4 hours of soaking), the lowest water content is at 25°C, and the highest is at 55°C. Fei Wang et al [14] , using a 3D topography measurement instrument, scanned the joint surfaces of sandstone and gneiss at varying temperatures (below 100°C) and soaking durations, finding that the joint surface parameters increased with temperature and showed an initial rise followed by a decline, peaking at 50°C. This aligns well with the findings of this experiment, indicating that the impact of temperature on water-rock interactions is most significant at 50°C.…”

Section: Experimental Results and Analysis 21 Characteristics Of Wate...mentioning

confidence: 99%

Experimental research on damage characteristics of red sandstone under the combined action of temperature, water and stress

Bao,

Qiao,

et al. 2024

Preprint

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In order to study the damage properties of red sandstone under combined action of temperature, water and stress, the uniaxial compression test was carried out for red sandstone after immersing in water for 0.5 hours, 1 hour and 3 hours at 25℃, 55℃, 85℃ and 95℃, the mechanical properties, characteristic stress points, acoustic emission RA-AF parameters and failure forms of red sandstone were analyzed, the damage constitutive equation was established, and the damage properties of red sandstone were studied. The results showed: (1) Temperature could significantly improve the saturated water content percentage of red sandstone. With the increase of temperature, the saturated water content percentage showed a trend of increase first and then decrease, and was the largest at 55℃; with the increase of temperature, the mechanical parameters (peak intensity, elasticity modulus, and stress at start point of expansion) decreased first and then increased, and was the smallest at 55℃; (2) The ratio of crack initiation stress to peak stress (σci/σf) increased first and then decreased at the same time of immersing in water as temperature increased, and decreased first and then increased as the time of immersing in water increased at the same temperature; (3) Acoustic emission RA-AF signals are primarily found in the stable and unstable crack extension stages, with most signals concentrated in the tensile areas. As immersion time increases, there is a gradual decrease in the total number of signals, while the proportion of signals in the shearing areas significantly increases. This is relatively consistent with the patterns of failure observed in red sandstone experiments; (4) The damage of temperature, water and stress on red sandstone is categorized into initial damage and load damage, and the damage constitutive equation of red sandstone under the joint action of temperature-water-load is established, which is applicable to red sandstone in water-saturated state below 100℃, The research results can provide certain theoretical references for practical engineering.

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Section: Experimental Results and Analysis 21 Characteristics Of Wate...mentioning

confidence: 99%

Experimental research on damage characteristics of red sandstone under the combined action of temperature, water and stress

Bao,

Qiao,

et al. 2024

Preprint

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“…The results show that the third principal stress of the main crack surface significantly increases the rock strength when the internal friction angle of the rock is lower than the crack inclination angle. Wang et al [7] explored the influence of temperature and time on water-rock interactions and conducted saturation experiments on ore rock and gneiss samples under different temperatures and soaking times. The results show that temperature changes the intensity of the water-rock interactions.…”

Section: State Of the Artmentioning

confidence: 99%

Damage Deformation and Acoustic Emission Characteristics of Raw Coal under Different Moisture Contents

Ren

Dong

2020

Teh. vjesn.

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Coal seam with different moisture contents considerably affects coal mining and gas extraction. The coal seam with moisture contents has unique damage deformation characteristics that differ from dry coal. Therefore, the damage deformation characteristics of coal seam with different moisture contents need to be investigated to enhance the effects of coal mining and gas extraction. To explore the damage and deformation laws and acoustic emission (AE) characteristics of coal samples with different moisture contents, coal samples with different moisture contents were prepared for triaxial compression AE localization tests, and the stress-strain characteristic parameters and AE counts, cumulative AE counts, AE energy, and cumulative AE energy of coal samples were prepared. The damage models of coal samples with different moisture contents were established based on AE counts, and the damage and deformation laws were analyzed. Results show that the peak intensities of coal samples decrease with the increase in moisture contents, the dry coal sample mainly undergoes shear failure, and the water-containing coal samples are pronounced by lateral splitting. The peak and cumulative AE counts of the coal samples decreased as the moisture contents increased. The peak and cumulative AE energies of coal samples decreased with the increase in moisture contents. The damage model established based on AE counts has a high degree of fit. Moreover, the damage amount of the coal samples increased with the moisture contents. The conclusions obtained in this study have practical guiding significance for demonstrating the mechanism and process of coal body dynamic disasters in actual engineering.

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“…The long-term stability of geotechnical engineering is closely related to its creep characteristics, especially some large-scale projects related to the national economy and people's livelihood (such as water conservancy and hydropower projects, railway and highway transportation projects, deep underground caverns, and mine high slope projects), which have a long service life. If the creep effect is ignored, it may cause major accidents of instability and failure of these projects [5][6][7][8][9][10][11]. The wetting-drying cycle refers to the process in which the rock mass is continuously subjected to repeated cycles of soaking, dewatering, soaking, and dewatering under rainfall or groundwater conditions [12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Study on creep mechanical properties of carbonaceous shale under dry-wet cycle

Wei¹,

et al. 2023

Phys. Scr.

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The creep mechanical properties of rock under dry-wet cycles are of great significance for studying the long-term aging stability of engineering rock and soil. In the past, there were few studies in this area, and most of the dry-wet cycle tests on rock samples did not conform to the actual stress state of the rock. In view of the shortcomings of these studies, this paper innovatively carried out the dry-wet cycle test of the rock under the continuous state of the stress field, and studied its mechanical properties. The specific method is to take carbonaceous shale as the research object, and use the soft rock shear rheological test system independently developed by our research group to carry out the shear creep test of carbonaceous shale under the action of dry-wet cycle. The test results show that the creep full-time curves of carbonaceous shale under different dry-wet cycles show a step-shaped curve shape. The dry-wet cycle has a significant effect on the deformation characteristics of carbonaceous shale. With the increase of the number of dry-wet cycles, the instantaneous strain of the rock gradually increases, the instantaneous shear modulus decreases from 596.650 MPa at 0 times to 365.199 MPa at 12 times, and the attenuation rate reaches 38.79 %. The creep strain and cumulative creep strain become larger, the stress required for accelerated creep decreases from 3.29 MPa to 2.75 MPa, and the accelerated creep time in the third stage increases from 11.892 h to 5.316 h, and the creep effect is more significant. The long-term strength of carbonaceous shale decreases from 3.05 MPa to 2.49 MPa, and the decrease increases with the increase of dry-wet cycles. The more the number of dry-wet cycles, the smaller the undulation of the shear failure section of the carbonaceous shale, and the smoother the surface. The research results have important guiding significance for the long-term aging stability analysis of engineering rock and soil mass subjected to repeated dry-wet cycles.

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The influence of temperature and time on water-rock interactions based on the morphology of rock joint surfaces

Cited by 29 publications

References 11 publications

Experimental research on damage characteristics of red sandstone under the combined action of temperature, water and stress

Experimental research on damage characteristics of red sandstone under the combined action of temperature, water and stress

Damage Deformation and Acoustic Emission Characteristics of Raw Coal under Different Moisture Contents

Study on creep mechanical properties of carbonaceous shale under dry-wet cycle

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