Thermal Effect on Compressional Wave Propagation Across Fluid-Filled Rock Joints

Yang, Hui; Duan, Huan‐Feng; Zhu, Jianbo

doi:10.1007/s00603-020-02254-5

Cited by 10 publications

(2 citation statements)

References 39 publications

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“…And the amplitude of the head wave is used to describe the attenuation quantitatively. The attenuation coefficient of the head wave is calculated as 34

α goodbreak= \frac{A_{t}}{A_{0}}

where α is the attenuation coefficient,

A_{0}

is the amplitude of the head wave at the beginning of the creep stage, and

A_{t}

is the amplitude of the head wave when the creep stage lasts for t min.…”

Section: Resultsmentioning

confidence: 99%

Experimental study on triaxial creep behavior of red sandstone under different pore pressures based on ultrasonic measurement

Zhou

Shen

Berto

2022

Fatigue Fract Eng Mat Struct

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Creep behavior of red sandstone under different pore pressures with a high temperature and confining pressure condition is studied in this paper. Ultrasonic detection method is used to monitor the variation of S wave in the creep test. The attenuation coefficient and S-wave velocity in the creep process are analyzed. Fast Fourier transform is used to analyze the variation of amplitude in peak frequency and four main frequencies. The experimental results show that the creep deformation increases with increasing pore pressure for a given deviatoric stress, and the S-wave velocity and attenuation coefficient decrease with increasing pore pressure. The relationship between creep strain and damage of the sample is established. It is found that the increase of pore pressure accelerates the increased rate of sample damage. Frequency spectrum analysis shows that the generation and development rate of microcracks increases with increasing pore pressure. The research can provide a theoretical basis for mining of deep mineral resources and the structural stability analysis of deep underground engineering.

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“…And the amplitude of the head wave is used to describe the attenuation quantitatively. The attenuation coefficient of the head wave is calculated as 34

α goodbreak= \frac{A_{t}}{A_{0}}

where α is the attenuation coefficient,

A_{0}

is the amplitude of the head wave at the beginning of the creep stage, and

A_{t}

is the amplitude of the head wave when the creep stage lasts for t min.…”

Section: Resultsmentioning

confidence: 99%

Experimental study on triaxial creep behavior of red sandstone under different pore pressures based on ultrasonic measurement

Zhou

Shen

Berto

2022

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

show abstract

“…16 In particular, the alteration of the flow characteristics in fractured formations can be monitored using seismic waves as high-resolution probes, sensitive to different geological conditions such as temperature, overburden and pore pressures, saturation level, and depth of interest. [16][17][18][19] As seismic waves propagate through a fractured medium, frequency-dependent elastic interface waves are generated, which are categorized into fast and slow interface waves with velocities ranging from shear-wave (upper limit) to Rayleigh-wave (lower limit). [20][21][22][23] While the energy of these interface waves depends on stress states and fracture geometry, 21,24 a direct relationship exists between fracture-specific stiffness and propagation of interface waves.…”

Section: Introductionmentioning

confidence: 99%