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Application and Optimization of the Parameters of the High-Level Boreholes in Lateral High Drainage Roadway

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  • Haiqing Shuang

    (School of Safety Science and Engineering, Xi’an University of Science and Technology (XUST), No. 58, Yanta Mid. Rd., Xi’an 710054, China
    Key Laboratory of Western Mine Exploitation and Hazard Prevention of the Ministry of Education, Xi’an University of Science and Technology (XUST), No. 58, Yanta Mid. Rd., Xi’an 710054, China)

  • Weitao Meng

    (School of Safety Science and Engineering, Xi’an University of Science and Technology (XUST), No. 58, Yanta Mid. Rd., Xi’an 710054, China)

  • Yulong Zhai

    (School of Safety Science and Engineering, Xi’an University of Science and Technology (XUST), No. 58, Yanta Mid. Rd., Xi’an 710054, China
    Department of Civil, Geological and Mining Engineering, École Polytechnique de Montréal, Montréal, QC H3C 3A7, Canada)

  • Peng Xiao

    (School of Safety Science and Engineering, Xi’an University of Science and Technology (XUST), No. 58, Yanta Mid. Rd., Xi’an 710054, China
    Key Laboratory of Western Mine Exploitation and Hazard Prevention of the Ministry of Education, Xi’an University of Science and Technology (XUST), No. 58, Yanta Mid. Rd., Xi’an 710054, China)

  • Yu Shi

    (School of Safety Science and Engineering, Xi’an University of Science and Technology (XUST), No. 58, Yanta Mid. Rd., Xi’an 710054, China
    Key Laboratory of Western Mine Exploitation and Hazard Prevention of the Ministry of Education, Xi’an University of Science and Technology (XUST), No. 58, Yanta Mid. Rd., Xi’an 710054, China)

  • Yu Tian

    (School of Safety Science and Engineering, Xi’an University of Science and Technology (XUST), No. 58, Yanta Mid. Rd., Xi’an 710054, China)

Abstract

The key parameters of high-level boreholes in high drainage roadways affect the gas treatment effect of the working face directly. Therefore, the layout parameters of high-level boreholes in the lateral high drainage roadway (LHDR) are determined and optimized as necessary. Based on the LHDR layout on the 2-603 working face of the Liyazhuang coal mine, the key technological requirements on high-level borehole parameters were analyzed and the distribution characteristics of the gas volume fraction in the coal roof were studied. The gas migration law in the mined-out areas was obtained and the layout locations of high-level boreholes were determined finally. The research demonstrates that the high-level boreholes lag the 2-603 working face distance and the position of the final borehole (the position of the final borehole in this paper refers to the distance between the final borehole and the roof) influence the stability of boreholes and the gas extraction effect. The distribution of the gas volume fraction from the intake airway to the return airway can be divided into the stable stage, slow growth stage, and fast growth stage. Influenced by the flow field in the mined-out areas, the mean volume fraction of the borehole-extracted gas has no obvious relationship with the gas volume fraction at the upper corner. According to the final optimization, the high-level borehole is determined as having a 15 m lag behind the working face and the position of the final borehole is 44 m away from the coal seam roof. These have been applied successfully in engineering practice.

Suggested Citation

  • Haiqing Shuang & Weitao Meng & Yulong Zhai & Peng Xiao & Yu Shi & Yu Tian, 2022. "Application and Optimization of the Parameters of the High-Level Boreholes in Lateral High Drainage Roadway," Sustainability, MDPI, vol. 14(24), pages 1-18, December.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:24:p:16908-:d:1005805
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    References listed on IDEAS

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    2. Yuliang Yang & Penghua Han & Zhining Zhao & Wei Chen, 2022. "The Method of Determining Layer in Bottom Drainage Roadway Taking Account of the Influence of Drilling Angle on Gas Extraction Effect," Sustainability, MDPI, vol. 14(9), pages 1-13, April.
    3. Kong, Shengli & Cheng, Yuanping & Ren, Ting & Liu, Hongyong, 2014. "A sequential approach to control gas for the extraction of multi-gassy coal seams from traditional gas well drainage to mining-induced stress relief," Applied Energy, Elsevier, vol. 131(C), pages 67-78.
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