IDEAS home Printed from https://ideas.repec.org/a/gam/jsusta/v14y2022i19p12399-d929081.html
   My bibliography  Save this article

Study on Evolution of Front Abutment Pressure at Working Face in Repeated Mining of Close-Distance Coal Seams

Author

Listed:
  • Fulian He

    (School of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
    Beijing Key Laboratory for Precise Mining of Intergrown Energy and Resources, China University of Mining and Technology (Beijing), Beijing 100083, China)

  • Liang Li

    (School of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
    Department of Civil Engineering, Lakehead University, Thunder Bay, ON P7B5E1, Canada)

  • Kai Lv

    (School of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China)

  • Binbin Qin

    (School of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China)

  • Xuhui Xu

    (School of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China)

  • Qing Ma

    (College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China)

  • Yongqiang Chen

    (Department of Civil Engineering, Lakehead University, Thunder Bay, ON P7B5E1, Canada
    College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China)

Abstract

In order to determine the reasonable width of a stopping coal pillar in close-distance coal seams, the evolution law of front abutment pressure of the working face with repeated mining was studied. Based on the actual engineering project, we conducted field measurement, theoretical analyses, numerical simulations and a physical similarity simulation test to study. The results show that: (1) according to field measurement, the influence range of front abutment pressure increases from 60 m to 75 m with repeated mining; (2) according to theoretical analysis, the arch height and span are negatively and positively correlated with the influence range of front abutment pressure, respectively; (3) with repeated mining, the arch height increased to 165 m, the arch span to 235 m and the influence range to 83.5 m by 14.5 m relative to that before repeated mining; (4) if it is necessary to ensure that the main roadway is less affected by the mining stress, the width of the stopping coal pillar in 2214 working face should be greater than 80 m. The influence range of front abutment pressure increases obviously with repeated mining in close-distance coal seams. The study provides a reference for similar engineering projects.

Suggested Citation

  • Fulian He & Liang Li & Kai Lv & Binbin Qin & Xuhui Xu & Qing Ma & Yongqiang Chen, 2022. "Study on Evolution of Front Abutment Pressure at Working Face in Repeated Mining of Close-Distance Coal Seams," Sustainability, MDPI, vol. 14(19), pages 1-17, September.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:19:p:12399-:d:929081
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/2071-1050/14/19/12399/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/2071-1050/14/19/12399/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Chunjing Gao & Dongmei Huang & Xikun Chang & Han Xi, 2019. "Risk Analysis and Extension Assessment for the Stability of Surrounding Rock in Deep Coal Roadway," IJERPH, MDPI, vol. 16(23), pages 1-16, November.
    Full references (including those not matched with items on IDEAS)

    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.

      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:jsusta:v:14:y:2022:i:19:p:12399-:d:929081. 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.