Preparation and characterization of a binary‐graft‐based, water‐absorbing dust suppressant for coal transportation

Qiu, Bao; Nie, Wen; Liu, Changqi; Liu, Yanghao; Zhang, Haihan; Wang, Hongkun; Hu, Jin

doi:10.1002/app.47065

Cited by 55 publications

(22 citation statements)

References 40 publications

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“…This kind of material has to be good enough in strength and deformation characteristics to ensure the safety and sustainability of civil infrastructure [1][2][3][4][5][6][7]. To capture and improve the behavior of geological materials, many studies have been carried out [8][9][10][11][12][13][14][15][16][17]. In many engineering applications, however, soils with unsatisfactory engineering properties are encountered [18,19], triggering the rapid development and wide application of soil improvement…”

Section: Introductionmentioning

confidence: 99%

Behavior of Fiber-Reinforced and Lime-Stabilized Clayey Soil in Triaxial Tests

Wang

Guo

et al. 2019

Applied Sciences

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The beneficial role of combining fiber reinforcement with lime stabilization in altering soil behavior has been established in the literature. However, the coupling effect of their combination still remains unclear in terms of its magnitude and microscopic mechanism, especially for natural fibers with special microstructures. The objective of this study was to investigate the coupling effect of wheat straw fiber reinforcement and lime stabilization on the mechanical behavior of Hefei clayey soil. To achieve this, an experimental program including unconsolidated–undrained (UU) triaxial tests and SEM analysis was implemented. Static compaction test samples were prepared on untreated soil, fiber-reinforced soil, lime-stabilized soil, and lime-stabilized/fiber-reinforced soil at optimum moisture content with determining of the maximum dry density of the untreated soil. The lime was added in three different contents of 2%, 4%, and 6%, and 13 mm long wheat straw fiber slices with a cross section one-quarter that of the intact ones were mixed in at 0.2%, 0.4%, and 0.6% by dry weight of soil. Analysis of the derived results indicated that the addition of a small amount of wheat straw fibers into lime-stabilized soil improved the intensity of the strain-softening behavior associated with mere lime stabilization. The observed evidence that the shear strength increase brought by a combination of 0.4% fiber reinforcement and 4% lime stabilization was smaller than the summation of the shear strength increases brought by their presence alone in a sample demonstrated a coupling effect between fiber reinforcement and lime stabilization. This coupling effect was also detected in the comparisons of the secant modulus and failure pattern between the combined treatment and the individual treatments. These manifestations of the coupling effect were explained by a microscopic mechanism wherein the fiber reinforcing effect was made more effective by the ways in which lime chemically stabilized the soil and lime stabilization development was quickened by the water channels passing through the surfaces and honeycomb pores of the wheat straw fibers.

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Section: Introductionmentioning

confidence: 99%

Behavior of Fiber-Reinforced and Lime-Stabilized Clayey Soil in Triaxial Tests

Wang

Guo

et al. 2019

Applied Sciences

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“…Based on the surfactant formulations, patents, and related academic papers on dust reduction via spraying in coal mine in various countries, two types of surfactants, i.e., anionic and nonionic, were selected from various surfactants in this study [55][56][57][58][59]. A total of four reagents were used for experiments.…”

Section: Methodsmentioning

confidence: 99%

An Experimental Study on Wetting of Coal Dust by Surfactant Solution

Jiang

Wang

Liu

et al. 2020

Advances in Materials Science and Engineering

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Surfactants can improve the wetting performance of the dust-reduction spraying water, thus improving the dust-reduction effect by spray. In this study, the performance of surfactant solution in wetting coal dust was investigated through experiments. In addition, the effects of surfactant type, mass fraction, metamorphic degree of coal, particle size, and additives were investigated. According to the results of surface tension experiments, the surface tension of the solution decreased with the increase of the concentration of surfactant. However, after reaching CMC, the surface tension did not have significantly decrease. SDBS and OP-10 had higher efficiency in decreasing the surface tension than the other two types of surfactants. The addition of sodium sulfate additives can further reduce the surface tension of the surfactant solution by a limited range. The coal dust wetting experiment showed that with the increase in the concentration of the surfactant, the contact angle of the droplets on the coal dust tablet was continuously reduced, and the wettability of the solution was continuously improved. The wettability of the OP-10 solution was optimal. At the same concentration, the minimum contact angle can be obtained in the OP-10 solution. As the contact angle of the coal dust increased, the growth rate in the coal dust reverse osmosis moisture absorption of the surfactant solution relative to the pure water increased. After the addition of sodium sulfate, the reverse osmosis moisture absorption of coal dust increased to varying degrees. In addition, as the concentration of additives increased, the moisture absorption of coal dust increased.

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“…At present, the most basic requirement of mine backfill technology is to meet the intensity requirement of mine backfill. [34][35][36] In the tailings backfill technology, uniaxial compressive strength at 28 days is required to be greater than 1 MPa, so the ice-added backfill bodies must also meet the requirements of the uniaxial compressive strength test [37][38][39][40]. In the test, standard cylindrical specimens with a diameter of 50 mm were made using backfill slurry of different proportions.…”

Section: Compressive Strength Analysismentioning

confidence: 99%

Experimental Research on Heat Transfer and Strength Analysis of Backfill with Ice Grains in Deep Mines

2019

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In deep mines, two urgent problems are a high temperature thermal environment and solid waste. Filling the goaf with slurry mixed with ice grains is an effective way to solve these two problems simultaneously. The thermal property and mechanical property of the ice-added backfill have a great influence on the cooling effect in the deep mine. In this study, an experimental facility for measuring the temperature distribution of ice-added backfill slurry was established, and the temperature of backfill slurry with different proportions was measured. Then, the thermal properties of temperature distribution and cooling capacity and the mechanical property of uniaxial compressive strength of the backfill specimens were analyzed, and the results indicated the following: firstly, the cooling capacity of ice-added backfill specimens is negatively related with the slurry concentration C and is positively related with the ice-water ratio Ω; secondly, the strength of backfill specimens is affected by the slurry concentration C and ice-water ratio Ω by a contrary law compared to the cooling capacity; thirdly, ice-added backfill slurry with an ice-water ratio Ω of 1:1 has the best mechanical property after solidification. The effects of the slurry concentration and ice-water ratio on the thermal and mechanical properties were analyzed, and the results indicated that the optimum proportion of ice-added backfill slurry is a slurry concentration of 74% and an ice-water ratio of 1:1 in the present research range. This study is significant for the deep mine cooling method with ice-added backfill.

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Preparation and characterization of a binary‐graft‐based, water‐absorbing dust suppressant for coal transportation

Cited by 55 publications

References 40 publications

Behavior of Fiber-Reinforced and Lime-Stabilized Clayey Soil in Triaxial Tests

Behavior of Fiber-Reinforced and Lime-Stabilized Clayey Soil in Triaxial Tests

An Experimental Study on Wetting of Coal Dust by Surfactant Solution

Experimental Research on Heat Transfer and Strength Analysis of Backfill with Ice Grains in Deep Mines

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