Triaxial compression system for rock testing under high temperature and high pressure

Zhao, Yangsheng; Wan, Zhijun; Feng, Zhiwei; Yang, Dinglong; Zhang, Yuan; Qu, Fang

doi:10.1016/j.ijrmms.2012.02.011

Cited by 99 publications

(37 citation statements)

References 14 publications

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“…Many experimental investigations have demonstrated that high temperature significantly affects the physical properties of sandstones (Heuze 1983;Glover et al 1995;Chopra 1997;Zhang et al 2001;Tang et al 2011;Zhao et al 2012). Analytical and numerical modeling of thermomechanical processes in sandstones have shown that variations in rock physical properties (such as bulk density, porosity, compressional wave velocity, etc.)…”

Section: Discussionmentioning

confidence: 99%

Strength Failure and Crack Evolution Behavior of Rock Materials Containing Pre-existing Fissures

Yang¹

2015

Springer Environmental Science and Engineering

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Section: Discussionmentioning

confidence: 99%

Strength Failure and Crack Evolution Behavior of Rock Materials Containing Pre-existing Fissures

Yang¹

2015

Springer Environmental Science and Engineering

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“…In the case of nuclear wastes disposal, the rock mass is subjected to a high-temperature environment and is affected by the temperature gradient. Numerous studies have demonstrated that both the physical and mechanical properties of rocks are affected by temperature exposure [5][6][7]. With an increase in temperature from 25 • C to 900 • C, the average mass loss rate of sandstone increases from 0 to 2.97% [8].…”

Section: Introductionmentioning

confidence: 99%

Laboratory Investigation of Granite Permeability after High-Temperature Exposure

He¹,

Yin²,

Jing³

2018

Processes

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This study experimentally analysed the influence of temperature levels (200, 300, 400, 500, 600, and 800 • C) on the permeability of granite samples. At each temperature level, the applied confining pressure was in the range of 10-30 MPa, and the inlet hydraulic pressure varied below the corresponding confining pressure. The results are as follows: (i) With an increase in the temperature level, induced micro-fractures in the granites develop, and the decrement ratios of both the P-wave velocity and the density of the granite increase; (ii) The relationship between the volume flow rate and the pressure gradient is demonstrably linear and fits very well with Darcy's law. The equivalent permeability coefficient shows an increasing trend with the temperature, and it can be best described using the mathematical expression K 0 = A × 1.01 T ; (iii) For a given temperature level, as the confining pressure increases, the transmissivity shows a decrease, and the rate of its decrease diminishes gradually.

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“…Rock masses involved in the underground storage of petroleum and natural gas, the utilization of geothermal resources, and the disposal of radioactive nuclear waste undergo high-temperature processes [1,2]. Najafi et al [3] demonstrated that rocks in the vicinity of an underground coal gasification panel were subjected to temperatures that exceeded 1,000 ∘ C. Many scholars have obtained valuable research results regarding the physical and mechanical properties of rocks after high-temperature treatments [4][5][6][7][8][9][10][11]. Ferrero and Marini [12] investigated the density of cracks in rocks via microscopic analysis and found that new fractures and cracks increased the porosity.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of the Relationship between the P-Wave Velocity and the Mechanical Properties of Damaged Sandstone

Ding

Song

2016

Advances in Materials Science and Engineering

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To obtain an improved and more accurate understanding of the relationship between the P-wave velocity and the mechanical properties of damaged sandstone, uniaxial compression tests were performed on sandstone subjected to different high-temperature treatments or freeze-thaw (F-T) cycles. After high-temperature treatment, the tests showed a generally positive relationship between the P-wave velocity and mechanical characteristics, although there were many exceptions. The mechanical properties showed significant differences for a given P-wave velocity. Based on the mechanical tests after the F-T cycles, the mechanical properties and P-wave velocities exhibited different trends. The UCS and Young’s modulus values slightly decreased after 30, 40, and 50 cycles, whereas both an increase and a decrease occurred in the P-wave velocity. The UCS, Young’s modulus, and P-wave velocity represent different macrobehaviors of rock properties. A statistical relationship exists between the P-wave velocity and mechanical properties, such as the UCS and Young’s modulus, but no mechanical relationship exists. Further attention should be given to using the P-wave velocity to estimate and predict the mechanical properties of rock.

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Triaxial compression system for rock testing under high temperature and high pressure

Cited by 99 publications

References 14 publications

Strength Failure and Crack Evolution Behavior of Rock Materials Containing Pre-existing Fissures

Strength Failure and Crack Evolution Behavior of Rock Materials Containing Pre-existing Fissures

Laboratory Investigation of Granite Permeability after High-Temperature Exposure

Experimental Investigation of the Relationship between the P-Wave Velocity and the Mechanical Properties of Damaged Sandstone

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