Research on a new method of “blocking-sealing” dust control and removal in fully mechanized heading face

Sen Xie, Haiming Yu, Yuxi Ye, Junwei Zhao, Chuangen Hou and Dongliang Zhao

Energy, 2023, vol. 283, issue C

Abstract: The fully mechanized heading face has the disadvantages of a large open space, difficult to seal, and low dust reduction efficiency. To overcome these issues, a new “blocking-sealing” method for cutting the produced dust was proposed in this study. The impact mechanism of ventilation parameters on dust pollution was analyzed using the CFD-DPM method. The results show that in the original state, the transverse offset airflow generated by the roller of the heading machine carries high-concentration dust into the sidewalk space, the length of the high-concentration dust area of more than 570 mg/m3 in the sidewalk space is about 16 m. After using the new method, the distribution of airflow mechanical energy between the sidewalk space and the bracket-coal wall space was redistributed. When the air suction volume was 600 m3/min, the high-concentration dust area basically disappeared. By increasing the air volume ratio to 1:1.5, the dust concentration in the original high-concentration dust area of the sidewalk space was basically lower than 172 mg/m3. When the side opening of the dust exhaust duct for suction (SO), the dust removal efficiency in the local area of the sidewalk reached 80.7%, which provides a new method for clean coal production.

Keywords: Fully mechanized heading face; Blocking-sealing; Local dust control; Dust pollution; Negative pressure dust removal (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:283:y:2023:i:c:s0360544223024258

DOI: 10.1016/j.energy.2023.129031

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