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Numerical simulation of ultrasonic P-wave propagation in water-bearing coal based on gas-liquid homogeneous wave velocity model

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  • Wang, Shibin
  • Qin, Yueping
  • Wang, Gang
  • Chen, Xuechang
  • Chi, Lihui
  • Yang, Liu

Abstract

This paper establishes the equivalent density and equivalent P-wave velocity models of coal bodies with different water saturation, and investigates the P-wave propagation evolution law of coal bodies with different water saturation from the perspective of numerical simulation. When the experimental coal samples continue to use high-pressure water after reaching the natural saturation state, the water saturation can be further increased, and the increase in water saturation is larger, and the corresponding P-wave velocity also appears to be increased more substantially, and this phenomenon also occurs in numerical simulation results, which indicates that the P-wave velocity will have an obvious increasing trend when the coal body is from nearly saturated to fully saturated. The experimental and numerical simulation results show that the P-wave velocity of coal samples increases with the water saturation degree in a similar exponential function, which further verifies the reasonableness and feasibility of the modelling based on the assumption of gas-liquid homogeneous medium. In addition, the propagation of P-wave in coal samples is affected by the pore and fracture structure, and the pore and fracture with small pore size has less influence on the P-wave, and vice versa.

Suggested Citation

  • Wang, Shibin & Qin, Yueping & Wang, Gang & Chen, Xuechang & Chi, Lihui & Yang, Liu, 2024. "Numerical simulation of ultrasonic P-wave propagation in water-bearing coal based on gas-liquid homogeneous wave velocity model," Energy, Elsevier, vol. 298(C).
  • Handle: RePEc:eee:energy:v:298:y:2024:i:c:s0360544224010405
    DOI: 10.1016/j.energy.2024.131267
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    References listed on IDEAS

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    1. A. J. Louli & A. Eldesoky & Rochelle Weber & M. Genovese & Matt Coon & Jack deGooyer & Zhe Deng & R. T. White & Jaehan Lee & Thomas Rodgers & R. Petibon & S. Hy & Shawn J. H. Cheng & J. R. Dahn, 2020. "Diagnosing and correcting anode-free cell failure via electrolyte and morphological analysis," Nature Energy, Nature, vol. 5(9), pages 693-702, September.
    2. Wang, Gang & Xie, Shuliang & Huang, Qiming & Wang, Enmao & Wang, Shuxin, 2023. "Study on the performances of fluorescent tracers for the wetting area detection of coal seam water injection," Energy, Elsevier, vol. 263(PE).
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