An Experimental Study of Effect of High Temperature on the Permeability Evolution and Failure Response of Granite Under Triaxial Compression

Yang, Sheng‐Qi; Tian, Wen Ling; Elsworth, Derek; Wang, Jingguo; Fan, L.F.

doi:10.1007/s00603-019-01982-7

Cited by 67 publications

(26 citation statements)

References 42 publications

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“…When the transient method is used to determine the permeability, the equilibrium pressure of the upstream and downstream of the seepage is 5MPa, the pressure pulse is 1MPa, and the downstream pressure reduction method of the seepage is adopted. In order to eliminate as much as possible the influence of rock heterogeneity on the experimental results, each set of tests in this test was designed as three specimens, and the stress-strain curves and permeability values were taken as the middle value of three specimens (Yang et al 2019). The test steps are:…”

Section: Test Proceduresmentioning

confidence: 99%

Experimental investigation on the evolution of damage and seepage characteristics for red sandstone under thermal–mechanical coupling conditions

Jiang

Zhang

2021

Environ Earth Sci

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Rock masses in underground space usually experience the coupling of high-temperature field, stress field and seepage field, which gives them complex mechanical behavior and permeability characteristics. In order to study the mechanical properties and permeability characteristics of red sandstone under different temperature environments, a seepage test under high temperature and triaxial compression is carried out based on the RLW-2000 multi-field coupling tester. The results show that the plastic flow of red sandstone at the stress peak under the same temperature is more obvious with the increase of confining pressure. In addition, as the confining pressure gradient increases, the permeability decreases and the trend becomes slower. And the higher the operating temperature, the easier to produce seepage channels inside the rock sample. The development of fissures is rapidly developed under the effect of temperature, so the seepage channels are widened and increased, and the permeability is greatly increased. The constitutive model of rock statistical damage considering the interaction of high temperature and osmotic pressure was constructed based on the experimental data and combining theoretical methods to reveal the characteristics of permeability evolution induced by thermal damage of rocks. The research results can be used as a reference for monitoring rock stability during geological engineering projects involving thermal-seepage-stress coupling conditions.

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Section: Test Proceduresmentioning

confidence: 99%

Experimental investigation on the evolution of damage and seepage characteristics for red sandstone under thermal–mechanical coupling conditions

Jiang

Zhang

2021

Environ Earth Sci

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“…The Special Issue covers recent developments in the understanding of permeability evolution of fractured rock during hydro-shearing (Kakurina et al 2020;Shen et al 2020), fracturing mechanisms of fractured rock (Zhuang et al 2020;Pan et al 2020;Li et al 2020;Zhou et al 2020), effect of high and low temperature on various rock properties (Yang et al 2020;Weng et al 2020) and characterization of transport and mechanical characteristics of rock under different conditions (Suzuki et al 2020;Zhang et al 2020). Kakurina et al (2020) investigate the orientation of injection-induced fault reactivation in two in situ experiments, one performed in carbonate rock at the Rustrel Low Noise Underground Laboratory (LSBB URL), France, and another in shale rock at the Mont Terri Rock laboratory, Switzerland.…”

Section: The Special Issuementioning

confidence: 99%

Special Issue “Observations of Coupled Processes in Fractured Geological Media at Various Space and Time”

2020

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“…Therefore, there are constraints operating between mineral particles, resulting in thermal stress. [27][28][29] Thermal stress is the main factor inducing thermal cracking, and the distribution characteristics of thermal cracks are of great significance to the stability of rock engineering. Therefore, it is necessary to investigate the thermal cracking characteristics and mechanism of rock under the influence of temperature, and there are few reports on this aspect.…”

Section: Introductionmentioning

confidence: 99%

“…However, there is a continuum, so each mineral particle in rock cannot deform completely according to its own expansion coefficient. Therefore, there are constraints operating between mineral particles, resulting in thermal stress 27–29 . Thermal stress is the main factor inducing thermal cracking, and the distribution characteristics of thermal cracks are of great significance to the stability of rock engineering.…”

Section: Introductionmentioning

confidence: 99%

Thermal cracking characteristics and mechanism of sandstone after high‐temperature treatment

Xiao

Yu²,

Li³

et al. 2021

Fatigue Fract Eng Mat Struct

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To study the thermal cracking characteristics and mechanism of sandstone after high-temperature treatment, the pore size distribution and micromorphology of sandstone were observed by nuclear magnetic resonance and scanning electron microscopy. Then, based on the Weibull distribution theory, a thermal elastic mechanical model of random heterogeneous rock was established for the rock unit, the thermal stress distribution characteristics of sandstone were analyzed, and the thermal fracture mechanism of rock was discussed. The results show that the porosities of the samples increased with increasing temperature and the proportion of large pores increased significantly when exceeded 400 C. Particularly when reached 1000 C, thermal cracking was distributed in a complex network. Additionally, different rock units are in different thermal stress states, which leads to the regional differences in the distribution of rock thermal fracture. When exceeded 400 C, there were obvious thermal cracks near the outer edge that weakened the mechanical properties of rock.

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An Experimental Study of Effect of High Temperature on the Permeability Evolution and Failure Response of Granite Under Triaxial Compression

Cited by 67 publications

References 42 publications

Experimental investigation on the evolution of damage and seepage characteristics for red sandstone under thermal–mechanical coupling conditions

Experimental investigation on the evolution of damage and seepage characteristics for red sandstone under thermal–mechanical coupling conditions

Special Issue “Observations of Coupled Processes in Fractured Geological Media at Various Space and Time”

Thermal cracking characteristics and mechanism of sandstone after high‐temperature treatment

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