3D XCT Mesostructure Characterization and Image-Based Discrete Element (DE) Modelling of Failure Patterns in Coal Gangue Particles (CGPs)

Zheng, Kaiyu; Qiu, Bing Jing; Li, J. P.; Gao, Kuidong

doi:10.1155/2019/4021368

Cited by 24 publications

(7 citation statements)

References 36 publications

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“…The auxiliary installation device for rock bolt drilling In the 20th century, Cundall et al [12][13][14] proposed the discrete element method (DEM), and simulated the conveying performance of screw conveyor for the first time through DEM. Nowadays, DEM has become the main application method for simulating screw conveying, and it is also widely used in geotechnical field, [15][16][17] mining field, [18][19][20] chemical field, [21][22][23] and agricultural field. [24][25][26] With the continuous improvement and development of the DEM, it has been widely used in the field of bit research to construct different drilling environments through DEM, and then analyze the particle movement in the drilling process.…”

Section: F I G U R Ementioning

confidence: 99%

Drilling study of bit in gravel environment based on DEM–MBD

Gao

Liu

et al. 2021

Engineering Reports

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In the process of rock bolt support for the roadway with floor heave, the rock bolt cannot reach the bottom of the borehole smoothly due to the influence of the collapse gravels around the borehole. In order to solve the problem of difficult rock bolt installation, the auxiliary installation device of rock bolt drilling was innovatively designed. At the same time, a new method of auxiliary bolt installation was put forward, in which a bit was installed at the bottom of the bolt to assist the bolt drilling. The drilling process of the bit was simulated by the co-simulation of discrete element method (DEM) and multibody dynamics method (MBD). The axial resistance of the bit and the change law of the particles movement were studied under different motion parameters and structural parameters. It was found that the drilling performance of bit was directly related to the motion parameters and structure of bit. And the selection of gravel parameters in DEM was verified by experiments. The research results can provide technical guidance for bit structure design and the selection of motion parameters of bolt drilling auxiliary installation device, and can effectively improve the rock bolt installation efficiency.

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Section: F I G U R Ementioning

confidence: 99%

Drilling study of bit in gravel environment based on DEM–MBD

Gao

Liu

et al. 2021

Engineering Reports

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“…Over the last 20 years ( Figure 1 a), more than 60 publications [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 ,…”

Section: Introductionunclassified

“…Due to the non-destructive nature of X-ray CT imaging, repeated scans of the same sample after an intervention such as loading [ 11 , 16 , 49 , 56 ] or heating [ 3 ] are possible and allow for time-lapse (4D) studies of changes in the assembly [ 53 ]. The digital data, collected with each scan, can feed directly into computed models about the particles and their behaviour in the granular assembly [ 27 , 47 , 48 , 54 ]. After early use of synchrotron beam lines [ 1 , 3 , 6 , 7 , 14 , 28 , 33 , 34 , 46 ], the emergence of laboratory X-ray CT instruments [ 2 , 4 , 8 , 9 , 10 , 11 , 12 , 13 , 18 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 30 , 31 , 32 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 47 , …”

Section: Introductionmentioning

confidence: 99%

“…The digital data, collected with each scan, can feed directly into computed models about the particles and their behaviour in the granular assembly [ 27 , 47 , 48 , 54 ]. After early use of synchrotron beam lines [ 1 , 3 , 6 , 7 , 14 , 28 , 33 , 34 , 46 ], the emergence of laboratory X-ray CT instruments [ 2 , 4 , 8 , 9 , 10 , 11 , 12 , 13 , 18 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 30 , 31 , 32 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 47 , 48 , 49 , 50 , 51 , 52 , 54 , 55 , 57 , 58 , …”

Section: Introductionmentioning

confidence: 99%

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A Review of Particle Size Analysis with X-ray CT

2023

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Particle size and morphology analysis is a problem common to a wide range of applications, including additive manufacturing, geological and agricultural materials’ characterisation, food manufacturing and pharmaceuticals. Here, we review the use of microfocus X-ray computed tomography (X-ray CT) for particle analysis. We give an overview of different sample preparation methods, image processing protocols, the morphology parameters that can be determined, and types of materials that are suitable for analysis of particle sizes using X-ray CT. The main conclusion is that size and shape parameters can be determined for particles larger than approximately 2 to 3 μm, given adequate resolution of the X-ray CT setup. Particles composed of high atomic number materials (Z > 40) require careful sample preparation to ensure X-ray transmission. Problems occur when particles with a broad range of sizes are closely packed together, or when particles are fused (sintered or cemented). The use of X-ray CT for particle size analysis promises to become increasingly widespread, offering measurements of size, shape, and porosity of large numbers of particles within one X-ray CT scan.

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“…Subsequently, DEM simulation had an application in the field of screw conveying to investigate conveying performance and bulk material conveying [17][18][19][20]. In addition, the DEM was also popular and widely utilized in other fields, such as in the chemical industry [21,22], pneumatic conveying [23][24][25], and rock cutting and crushing [26][27][28][29][30]. Moreover, DEM had been applied in the field of coal shearing [31,32].…”

Section: Introductionmentioning

confidence: 99%

Loading Performance of a Novel Shearer Drum Applied to Thin Coal Seams

et al. 2021

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The poor loading performance of shearer drums restricts the development and production efficiency of coal in thin coal seams. Changing operation and structural parameters can improve the drum’s loading performance to some extent, but the effect is not obvious. A two-segment differential rotational speed drum (TDRSD) was proposed after analyzing the drum’s influence mechanism on coal particles. To further reveal the drum’s coal loading principle, the velocity, particles distribution, and loading rate were analyzed. The effect of the matching relationship of the rotational speed and helix angle between the front and rear drum are also discussed. The results show that a lower front drum rotational speed had a positive impact on improving the loading performance, and the loading rate first increases and then decreases with the increase in rear drum rotational speed. The optimal loading performance was obtained in the range 60–67.5 rpm. The front drum’s helix angle had no evident effect on loading performance, and the loading rate increase with the increase in the rear drum’s helix angle. The results provide a reference and guidance for operation parameters selection, structure design, and drum optimization.

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3D XCT Mesostructure Characterization and Image-Based Discrete Element (DE) Modelling of Failure Patterns in Coal Gangue Particles (CGPs)

Cited by 24 publications

References 36 publications

Drilling study of bit in gravel environment based on DEM–MBD

Drilling study of bit in gravel environment based on DEM–MBD

A Review of Particle Size Analysis with X-ray CT

Loading Performance of a Novel Shearer Drum Applied to Thin Coal Seams

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