IDEAS home Printed from https://ideas.repec.org/a/gam/jeners/v11y2018i3p560-d134820.html
   My bibliography  Save this article

A Gas–Solid–Liquid Coupling Model of Coal Seams and the Optimization of Gas Drainage Boreholes

Author

Listed:
  • Yuexia Chen

    (State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400030, China
    State and Local Joint Engineering Laboratory of Methane Drainage in Complex Coal Gas Seam, Chongqing University, Chongqing 400030, China)

  • Jiang Xu

    (State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400030, China
    State and Local Joint Engineering Laboratory of Methane Drainage in Complex Coal Gas Seam, Chongqing University, Chongqing 400030, China)

  • Shoujian Peng

    (State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400030, China
    State and Local Joint Engineering Laboratory of Methane Drainage in Complex Coal Gas Seam, Chongqing University, Chongqing 400030, China)

  • Fazhi Yan

    (State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400030, China
    State and Local Joint Engineering Laboratory of Methane Drainage in Complex Coal Gas Seam, Chongqing University, Chongqing 400030, China)

  • Chaojun Fan

    (College of Mining, Liaoning Technical University, Fuxin 123009, China
    Energy and Mineral Engineering, Pennsylvania State University, University Park, State College, PA 16801, USA)

Abstract

For a gas–solid–liquid coupling model of coal seams, previous permeability models basically supposed uniaxial strains as the boundary condition for coal reservoirs without considering the deformation caused by changes in humidity. The permeability model varies under different boundary conditions. According to the true triaxial stress state of coal reservoirs, a permeability model considering the effective stress, sorption and desorption, and wet strain was established. Based on the permeability model, the continuity equation of gas and water and the stress field equation were coupled. Then, the model was incorporated in the COMSOL suite to simulate gas drainage from boreholes in floor roadways passing through seams in a coal mine. By comparing with the measured gas flow on site, the model was verified as being reliable. Moreover, the spacing and layout shape of boreholes in floor roadways were simulated. To achieve the aim of eliminating regional outburst within 180 days and decreasing the number of boreholes so as to reduce the cost, the spacing and shape of boreholes were optimized. When the superimposed effect of the boreholes was not considered, the optimal spacing of boreholes was 3 r ; if the superimposed effect was taken into account, the spacing could be set to within 3 r ≤ L ≤ R , where r and R represent the effective gas drainage radius and the influence radius of gas drainage, respectively. The borehole spacing could be appropriately increased when the boreholes were arranged in rhomboidal form. To achieve the same range of outburst elimination, the rhomboidal layout can decrease the number of boreholes to reduce cost, thus realizing the objective of this optimization process.

Suggested Citation

  • Yuexia Chen & Jiang Xu & Shoujian Peng & Fazhi Yan & Chaojun Fan, 2018. "A Gas–Solid–Liquid Coupling Model of Coal Seams and the Optimization of Gas Drainage Boreholes," Energies, MDPI, vol. 11(3), pages 1-21, March.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:3:p:560-:d:134820
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1996-1073/11/3/560/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/1996-1073/11/3/560/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Zhicheng Xie & Dongming Zhang & Zhenlong Song & Minghui Li & Chao Liu & Dongling Sun, 2017. "Optimization of Drilling Layouts Based on Controlled Presplitting Blasting through Strata for Gas Drainage in Coal Roadway Strips," Energies, MDPI, vol. 10(8), pages 1-13, August.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Luwei Zhang & Yanyu Chu & Yong Zhou & Gaofeng Ren & Yongxiang Ge & Jun Liu, 2023. "The In-Hexagon Borehole Layout for the Optimization of the Effective Radius of Gas Extraction," Sustainability, MDPI, vol. 15(17), pages 1-22, August.
    2. Zhenlong Song & Minghui Li & Guangzhi Yin & Pathegama Gamage Ranjith & Dongming Zhang & Chao Liu, 2018. "Effect of Intermediate Principal Stress on the Strength, Deformation, and Permeability of Sandstone," Energies, MDPI, vol. 11(10), pages 1-11, October.
    3. Xin Yang & Gongda Wang & Mingqi Ni & Longyong Shu & Haoran Gong & Zhie Wang, 2022. "Investigation on Key Parameters of N 2 Injection to Enhance Coal Seam Gas Drainage (N 2 -ECGD)," Energies, MDPI, vol. 15(14), pages 1-15, July.

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Haojun Wu & Min Gong & Xiaodong Wu & Yang Guo, 2022. "Effect and Response of Coal and Rock Media Conditions on Deep-Hole Pre-Splitting Blasting Techniques for Gas Drainage," Energies, MDPI, vol. 15(22), pages 1-17, November.
    2. Tengteng Li & Bing Wu & Baiwei Lei, 2019. "Study on the Optimization of a Gas Drainage Borehole Drainage Horizon Based on the Evolution Characteristics of Mining Fracture," Energies, MDPI, vol. 12(23), pages 1-15, November.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jeners:v:11:y:2018:i:3:p:560-:d:134820. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.