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Research on environmental dust pollution: ventilation and dust space–time evolution law of a fully mechanized mining face with 7-m mining height

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Abstract 

To investigate the influence of dust produced by multi-dust sources at a fully mechanized mining face with a large mining height on the safety conditions in a coal mine, the No. 22305 fully mechanized mining face of the Bulianta coal mine was considered as the research object in this study, and the space–time evolution of dust was analyzed with computational fluid dynamics (CFD). The wind flow simulation results show that the distribution law of wind flow is mainly affected by the structure of the roadway, and the speed and direction of the wind flow change greatly while passing by corners and through large-scale equipment. The dust generation and pollution diffusion laws with respect to time and space were investigated based on simulations of dust production due to 5-s, 30-s, and 60-s coal cutting, continuous coal cutting, and hydraulic support shifting. The space–time evolution law under different dust-producing times shows the transportation and diffusion procedure of dust under the wind flow; the dust-generated via coal mining and shifting were superposed on the downwind side and a 36-m-long dust belt was formed, which filled the coal mining space; the dust concentration in the breathing zone 120 m downwind the front drum had a dust concentration higher than 1700 mg/m3, this was the crucial dust-proof area, and effective dust reduction methods should be addressed.

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Data availability

All data generated or analyzed during this study are included in this published article [and its supplementary information files].

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Funding

This work has been funded by the National Natural Science Foundation of China (NO. 52174191 and 51874191), the National Key R&D Program of China (2017YFC0805201), Qingchuang Science and Technology Project of Shandong Province University (2020KJD002), Taishan Scholars Project Special Funding (TS20190935).

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Authors and Affiliations

  1. College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, China

    Dawei Chen, Wen Nie, Zihao Xiu, Bo Yang, Tao Du, Qiang Liu & Huitian Peng

  2. State Key Laboratory of Mining Disaster Prevention and Control Co-Found By Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China

    Wen Nie

Authors
  1. Dawei Chen
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  2. Wen Nie
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  3. Zihao Xiu
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  4. Bo Yang
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  5. Tao Du
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  6. Qiang Liu
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  7. Huitian Peng
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Contributions

Dawei Chen: software, formal analysis, writing- original draft preparation, methodology. Wen Nie: conceptualization, writing—reviewing and editing, funding acquisition. Zihao Xiu: visualization, investigation. Bo Yang: data curation. Tao Du: software. Qiang Liu: supervision. Huitian Peng: software, validation.

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Correspondence to Wen Nie.

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Chen, D., Nie, W., Xiu, Z. et al. Research on environmental dust pollution: ventilation and dust space–time evolution law of a fully mechanized mining face with 7-m mining height. Environ Sci Pollut Res 29, 33627–33644 (2022). https://doi.org/10.1007/s11356-021-17967-5

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  • DOI: https://doi.org/10.1007/s11356-021-17967-5

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