Characterization of ultrasonic induced damage on multi-scale pore/fracture in coal using gas sorption and μ-CT 3D reconstruction

Liu, Peng; Nie, Baisheng; Zhao, Zhengduo; Zhao, Yulong; Li, Quangui

doi:10.1016/j.fuel.2022.126178

Cited by 30 publications

(8 citation statements)

References 48 publications

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“…The reconstruction processes of the naturally fractured coal samples are depicted in Figure 4. To more effectively illustrate the characteristics of pores and fissures within the natural fissure coal body, a three-dimensional reconstruction of the scanned two-dimensional image is required, which primarily involves several steps [30][31][32][33]. Initially, the twodimensional slice image undergoes preprocessing, filtering, and noise reduction to eliminate any artifacts or noise induced by scanning equipment or human errors, which enhances the clarity of the structure in the image while preserving its integrity.…”

Section: Reconstruction Processesmentioning

confidence: 99%

Promoting Sustainable Coal Gas Development: Microscopic Seepage Mechanism of Natural Fractured Coal Based on 3D-CT Reconstruction

Zhang,

Jin,

Feng

et al. 2024

Sustainability

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Green mining is an effective way to achieve sustainable development in the coal industry. Preventing coal and gas outburst dynamic disasters are essential for ensuring sustainable and safe mining. The numerous microscopic pores within the coal serve as the primary storage space for gas, making it critical to explore the structural distribution and seepage characteristics to reveal the disaster mechanism. Under mining stress, gas within the micropores of the coal migrates outward through cracks, with these cracks exerting a significant control effect on gas migration. Therefore, this study focuses on utilizing natural fractured coal bodies as research objects, employing a micro-CT imaging system to conduct scanning tests and digital core technology to reconstruct sample pore and fracture structures in three dimensions, and characterizing the pores, cracks, skeleton structure, and connectivity. A representative elementary volume (REV) containing macro cracks was selected to establish an equivalent model of the pore network, and a seepage simulation analysis was performed using the visualization software. Revealing the seepage characteristics of fractured coal mass from a microscopic perspective. The research results can provide guidance for gas drainage and dynamic disaster early warning in deep coal mines, thus facilitating the sustainable development of coal mining enterprises.

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Section: Reconstruction Processesmentioning

confidence: 99%

Promoting Sustainable Coal Gas Development: Microscopic Seepage Mechanism of Natural Fractured Coal Based on 3D-CT Reconstruction

Zhang,

Jin,

Feng

et al. 2024

Sustainability

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“…Alternatively, the use of ultrasound waves during the adsorption process enhanced the sorption efficiency, where ultrasonication created a porous structure and improved the mass transfer of the particles in the solution to reach the adsorption active sites. [94][95][96][97][98][99] Moreover, the oxygen-containing active groups such as O-H, CO, C-O-C, Ti-O and Ti-O-Ti observed in the FTIR spectra (Fig. 1a) can form complexes with Sr(II) and Ce(III) ions by donating some electrons to these metal ions.…”

Section: Sorption and Sono-sorption: A Comparative Studymentioning

confidence: 99%

Enhanced removal of Ce(iii) and Sr(ii) ions from aqueous solution using ultrasonication-assisted sawdust-TiO₂ sorbent

Hassan

El-Deen

2023

Environ. Sci.: Water Res. Technol.

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“…Extensive research has been conducted on the evolution of coal fractures under static loads, using technologies such as high-speed photography 15 , real-time CT scanning 16,17 , and scanning electron microscopy 18 , which are widely used in coal fracture evolution research. Currently, real-time CT scanning, scanning electron microscopy, and other technologies cannot be applied to the study of coal fracture evolution under impact loading, owing to the high strain rate of impact loads.…”

Section: Introductionmentioning

confidence: 99%

Research on Dynamic Tensile Characteristics and Surface Crack Evolution Law of coal under Impact Loading

Wang,

Li,

Zhang

et al. 2024

Preprint

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To investigate the dynamic tensile failure process of coal subjected to impact loading, this study used high-speed camera photography and digital image correlation technology to capture the dynamic tensile failure of coal under impact loading. The dynamic tensile evolution from initial stress to failure was quantitatively analyzed. The captured coal fracture images were processed, and the fractal dimension was used to quantitatively describe the surface crack evolution of coal under impact loading. The following conclusions were drawn from the experimental results: (1) An empirical formula was established to describe the dynamic tensile strength characteristics of coal under different loading rates. (2) During the loading process of Brazilian disc coal samples under impact loading, the maximum strain first appeared at the contact end between the sample and the incident rod. (3) Under impact loading, the Brazilian disc coal sample cracked from the center of the sample and the crack subsequently extended toward both ends. The fractal dimension of the crack exhibited a power exponential relationship with time, and the variation range of the fractal dimension of the crack was in the range of 1.05–1.39.

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Characterization of ultrasonic induced damage on multi-scale pore/fracture in coal using gas sorption and μ-CT 3D reconstruction

Cited by 30 publications

References 48 publications

Promoting Sustainable Coal Gas Development: Microscopic Seepage Mechanism of Natural Fractured Coal Based on 3D-CT Reconstruction

Promoting Sustainable Coal Gas Development: Microscopic Seepage Mechanism of Natural Fractured Coal Based on 3D-CT Reconstruction

Enhanced removal of Ce(iii) and Sr(ii) ions from aqueous solution using ultrasonication-assisted sawdust-TiO₂ sorbent

Research on Dynamic Tensile Characteristics and Surface Crack Evolution Law of coal under Impact Loading

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Characterization of ultrasonic induced damage on multi-scale pore/fracture in coal using gas sorption and μ-CT 3D reconstruction

Cited by 30 publications

References 48 publications

Promoting Sustainable Coal Gas Development: Microscopic Seepage Mechanism of Natural Fractured Coal Based on 3D-CT Reconstruction

Promoting Sustainable Coal Gas Development: Microscopic Seepage Mechanism of Natural Fractured Coal Based on 3D-CT Reconstruction

Enhanced removal of Ce(iii) and Sr(ii) ions from aqueous solution using ultrasonication-assisted sawdust-TiO2 sorbent

Research on Dynamic Tensile Characteristics and Surface Crack Evolution Law of coal under Impact Loading

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Enhanced removal of Ce(iii) and Sr(ii) ions from aqueous solution using ultrasonication-assisted sawdust-TiO₂ sorbent