Transparent confined compression tests on particle beds: Observations and implications

Jiang, Hui; Zhou, Yu; Chi, Cheng; Zhang, C.H.

doi:10.1016/j.powtec.2018.05.050

Cited by 11 publications

(2 citation statements)

References 21 publications

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“…Commonly employed in engineering, the pore ratio e represents the proportion of pores in the soil, which is defined as the ratio of the pore volume V v to the solid particle volume V s , expressed as vs e V V = [8]. In one-dimensional compression tests of coarsegrained soil, the e-logσ compression curve can be obtained, and the material properties, initial void ratio, particle size and gradation of samples can have different effects on the compression curve [9,14,23,27]. Hagerty et al [5] tested the effects of initial void ratio, particle size, particle angularity and particle material composition of three materials on particle breakage.…”

Section: Introductionmentioning

confidence: 99%

One-Dimensional Compression Fractal Theory and Experimental Verification of Coarse-Grained Soil

Xu,

2024

Int. J. Geomech.

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Coarse-grained soil particles will be obviously broken under high stress, and particle breakage is the main reason for the compression of samples. The compressibility λ in e-logσ curve is closely related to the degree of particle breakage. In this paper, a term of surface energy caused by particle breakage is added to the energy conservation equation. The variation of surface area per unit volume of sample is described by fractal dimension, and then the relationship between fractal dimension and vertical stress is established. Finally, the theoretical formula of compression coefficient is obtained, and the fractal theoretical model of one-dimensional compression deformation of coarse-grained soil is established. Compression coefficient is related to surface free energy, internal friction angle, shape factor and initial particle size. In addition, calcareous sand and gypsum were selected for one-dimensional compression tests at high stress. With the increase of initial particle size, the compression coefficient increases. According to the relationship between fractal dimension and vertical stress, the theoretical value of compression coefficient is obtained. The theoretical value is very close to the experimental value, which proves that the fractal theory of one-dimensional compression deformation of coarse-grained soil is correct.

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Section: Introductionmentioning

confidence: 99%

One-Dimensional Compression Fractal Theory and Experimental Verification of Coarse-Grained Soil

Xu,

2024

Int. J. Geomech.

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“…Many studies have investigated the principle of single particles and particle bed comminution. A large number of valuable results have been obtained, such as assessment of particle strength, estimation of energy requirement for size reduction and PSD, and equipment modelling (Shi, 2016;Tavares and King, 1998;Jiang et al, 2018;Schönert, 1996). The mechanism of particle material comminution has been revealed, which provides a theoretical basis for improving and optimizing the existing comminution equipment and developing energy-saving, environmental comminution equipment.…”

Section: Introductionmentioning

confidence: 99%

Experimental research on energy-size distribution model of coal particle bed comminution

Zhou¹,

Guo²,

Pan³

et al. 2020

Physicochem. Probl. Miner. Process.

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In order to accurately predict the particle size distribution (PSD) of coal particle bed comminution under different applied pressures, the tests of two kinds of coal with four size fractions under five different applied pressures were carried out by TAW-3000 hydraulic servo testing machine. The Gaudin-Schumann(G-S) distribution is extended by the fractal theory and the JK size-dependent breakage model is discussed. Two mathematical models for predicting PSD of crushing products in coal particle bed comminution are proposed. Results show that the relationship between the mass-specific energy and applied pressure is linear. Because of the protective effect of fine particles, the change of particle size modulus d0 in G-S distribution is not significant, while the distribution parameter α decreases logarithmically with the increase of mass-specific energy. With the decrease of size fraction, the crushability of coal particle bed decreases, and a master curve can be used to fit the comminution characteristics of coal particle bed with different size fractions. The extended G-S distribution model and the JK size-dependent breakage model have better fit the results of coal particle bed comminution. This research provides a useful reference for the mathematical modelling of coal particle bed comminution.

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Progressive fragmentation of granular assemblies within rockslides: Insights from discrete-continuous numerical modeling

Jiang,

Zhou,

Wang

et al. 2024

J. Mt. Sci.

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Transparent confined compression tests on particle beds: Observations and implications

Cited by 11 publications

References 21 publications

One-Dimensional Compression Fractal Theory and Experimental Verification of Coarse-Grained Soil

One-Dimensional Compression Fractal Theory and Experimental Verification of Coarse-Grained Soil

Experimental research on energy-size distribution model of coal particle bed comminution

Progressive fragmentation of granular assemblies within rockslides: Insights from discrete-continuous numerical modeling

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