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Dust transport law and dust suppression technology based on gas-solid two-phase flow

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An Editorial Expression of Concern to this article was published on 28 September 2021

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Abstract

In open-pit coal mines where burned rock occurs, because the burned rock is fragile and contains a large number of fine particles, a large amount of dust will be produced in the process of mining and loading. The dust concentration is as high as 2500mg/m3 on average, which seriously affects the health of the workers in the open-pit mine and the atmospheric environment in the mining area. In order to control the dust disaster in mining and loading face with burning rock, the dust diffusion concentration model of gas-solid two-phase flow was established to study the dust escaping law. Based on the engineering background of an open-pit coal mine in Xinjiang, China, the dust concentration, dispersion, composition, and other basic parameters were tested in situ. The measured data are applied to the numerical simulation of dust diffusion. The results show that there is a negative correlation between dust surface tension coefficient and dust diffusion degree. When the dust collides, polymerizes, and breaks, the dust with high surface tension is not easy to polymerize into large particles, and the dust diffusion phenomenon is more obvious. Based on the characteristics of dust in burned rock, wet dust removal method was adopted to control dust disaster. Based on the characteristics of poor hydrophilicity of burned rock dust, in order to enhance the effect of wet dust removal, a compound dust suppressor suitable for dust removal and dust reduction in burned area was developed. The effect of the dust suppressor was verified by scanning electron microscope (SEM) test system. The results show that the dust suppressant can effectively reduce the surface tension coefficient of dust, increase the viscosity coefficient and surface tension, and make the dust easy to aggregate into large particles and settle, and the dust removal effect is good.

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Acknowledgements

Integrated technology of ecological environment restoration and mining in open-pit coal mine based on green degree, Project Grant No. 51474119, National Natural Science Foundation of China, is acknowledged.

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Authors and Affiliations

  1. College of Mining, Liaoning Technical University, Fuxin, 123000, Liaoning, China

    Zhengzhao Jia, Ziling Song, Juyu Jiang & Xiaohe Wang

  2. College of Environmental, Liaoning Technical University, Fuxin, 123000, Liaoning, China

    Xiaoliang Zhao

  3. College of Environment, Inner Mongolia University of Technology, Hohhot, 010000, Inner Mongolia, China

    Junfu Fan

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  1. Zhengzhao Jia
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  2. Ziling Song
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  3. Xiaoliang Zhao
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  4. Junfu Fan
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Correspondence to Zhengzhao Jia.

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The authors declare that they have no competing interests.

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Responsible Editor: Ahmed Farouk

This article is part of the Topical Collection on Big Data and Intelligent Computing Techniques in Geosciences

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Jia, Z., Song, Z., Zhao, X. et al. Dust transport law and dust suppression technology based on gas-solid two-phase flow. Arab J Geosci 14, 1751 (2021). https://doi.org/10.1007/s12517-021-08121-z

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  • DOI: https://doi.org/10.1007/s12517-021-08121-z

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