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Dust Control Technology in Dry Directional Drilling in Soft and Broken Coal Seams

Author

Listed:
  • Dongmei Wu

    (Yongcheng Vocational College, Yongcheng 476600, China)

  • Jie Gao

    (State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou 221116, China)

  • Ke Lu

    (CCTEG Chongqing Research Institute, Chongqing 400037, China)

Abstract

High rate of dust generation and serious dust diffusion in dry directional drilling in soft and broken coal seams (SBCS) have long been critical problems in the mining process. To solve these problems, in this study, a dust hood was designed and applied to realize non-contact dust control in drilling holes. The optimal performance of the dust hood was achieved when different technical parameters, including the gap width between the dust hood and the drill pipe, the air-slot width of the sealing device, the slag discharge pressure, and the air curtain pressure were controlled at 2 mm, 0.2 mm, 0.3 MPa, and 0.5 MPa, respectively. As a result, the dust concentration was reduced from 540 mg/m 3 to 15 mg/m 3 , with dust control efficiency reaching 97.2%. The in situ test results confirmed good dust control effects, as the dust control efficiency reached 98.3% after using the dust hood.

Suggested Citation

  • Dongmei Wu & Jie Gao & Ke Lu, 2022. "Dust Control Technology in Dry Directional Drilling in Soft and Broken Coal Seams," Energies, MDPI, vol. 15(10), pages 1-11, May.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:10:p:3804-:d:821027
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    References listed on IDEAS

    as
    1. Xiaofei Liu & Ping Chang & Enyuan Wang & Zhenguo Zhang & Shuai Yang, 2018. "Numerical Study of the Respirable Coal Dust Removal Performance of a Vortex Ventilation System at an Excavation Face," Energies, MDPI, vol. 11(9), pages 1-18, September.
    2. Yingquan Qi & Xiangyang Gan & Zhong Li & Lu Li & Yan Wang & Wentao Ji, 2021. "Variation and Prediction Methods of the Explosion Characteristic Parameters of Coal Dust/Gas Mixtures," Energies, MDPI, vol. 14(2), pages 1-13, January.
    3. Junfeng Wang & Yansong Zhang & Huifeng Su & Jinshe Chen & Bo Liu & Yuyuan Zhang, 2019. "Explosion Characteristics and Flame Propagation Behavior of Mixed Dust Cloud of Coal Dust and Oil Shale Dust," Energies, MDPI, vol. 12(20), pages 1-13, October.
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    Cited by:

    1. Zhichao Liu & Zhongchen Ao & Wei Zhou & Baowei Zhang & Jingfu Niu & Zhiming Wang & Lijie Liu & Zexuan Yang & Kun Xu & Wenqi Lu & Lixia Zhu, 2023. "Research on the Physical and Chemical Characteristics of Dust in Open Pit Coal Mine Crushing Stations and Closed Dust Reduction Methods," Sustainability, MDPI, vol. 15(16), pages 1-21, August.

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