Preparation and characterization of a novel environmentally friendly coal dust suppressant

Hu, Jin; Nie, Wen; Zhang, Yansong; Liu, Yanghao; Qiu, Bao; Wang, Hongkun; Huang, Dongmei

doi:10.1002/app.47354

Cited by 87 publications

(30 citation statements)

References 32 publications

(23 reference statements)

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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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“…The wave number of 1393.1 cm −1 corresponds to the characteristic peaks of sulfa bond and COO-. The wave numbers of these two peaks are 1653.69 cm −1 and 1529.78 cm −1 respectively, which correspond to the characteristic spectral peaks and their bending vibration of the benzene ring in the C-H [70][71][72][73][74][75].…”

Section: Infrared Spectra Testsmentioning

confidence: 93%

Development of Environmental Friendly Dust Suppressant Based on the Modification of Soybean Protein Isolate

Nie

Zhang

et al. 2019

Processes

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Aiming to further improve the dust suppression performance of the dust suppressant, the present study independently develops a new type of biodegradable environmentally-friendly dust suppressant. Specifically, the naturally occurring biodegradable soybean protein isolate (SPI) is selected as the main material, which is subject to an anionic surfactant, i.e., sodium dodecyl sulfonate (SDS) for modification with the presence of additives including carboxymethylcellulose sodium and methanesiliconic acid sodium. As a result, the SDS-SPI cementing dust suppressant is produced. The present study experimentally tests solutions with eight different dust suppressant concentrations under the same experimental condition, so as to evaluate their dust suppression performances. Key metrics considered include water retention capability, cementing power and dust suppression efficiency. The optimal concentration of dust suppressant solution is determined by collectively comparing these metrics. The experiments indicate that the optimal dust suppressant concentration is 3%, at which level the newly developed environmentally-friendly dust suppressant solution exhibits a decent dust suppression characteristic, with the water retention power reaching its peak level, and the corresponding viscosity being 12.96 mPa·s. This performance can generally meet the requirements imposed by coal mines. The peak efficiency of dust suppression can reach 92.13%. Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) were used to analyze the dust suppression mechanism of the developed dust suppressant. It was observed that a dense hardened shell formed on the surface of the pulverized coal particles sprayed with the dust suppressant. There is strong cementation between coal dust particles, and the cementation effect is better. This can effectively inhibit the re-entrainment of coal dust and reduce environmental pollution.

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“…e CCF-7000 direct-reading dust concentration analyzer is used at the measuring points to measure the dust concentration before and after water injection in the coalbed. e sampling time is set as 2 min, and the sampling flow rate is 15 L/min [51][52][53][54]. e measured dust concentration at each measurement point before and after water injection is shown in Figure 9.…”

Section: Dust Reduction Effect Of Coalbed Eater Injectionmentioning

confidence: 99%

Numerical Simulation and Engineering Application of Coalbed Water Injection

Shi

Wang

Liu

et al. 2019

Mathematical Problems in Engineering

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Coalbed water injection is the most basic and effective dust-proof technology in the coal mining face. To understand the influence of coalbed water injection process parameters and coalbed characteristic parameters on coal wetting radius, this paper uses Fluent computational fluid dynamics software to systematically study the seepage process of coalbed water injection under different process parameters and coalbed characteristic parameters, calculation results of which are applied to engineering practice. The results show that the numerical simulation can help to predict the wetness range of coalbed water injection, and the results can provide guidance for the onsite design of coalbed water injection process parameters. The effect of dust reduction applied to onsite coalbed water injection is significant, with the average dust reduction rates during coal cutting and support moving being 67.85% and 46.07%, respectively, which effectively reduces the dust concentration on the working face and improves the working environment.

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Preparation and characterization of a novel environmentally friendly coal dust suppressant

Cited by 87 publications

References 32 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

Development of Environmental Friendly Dust Suppressant Based on the Modification of Soybean Protein Isolate

Numerical Simulation and Engineering Application of Coalbed Water Injection

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