IDEAS home Printed from https://ideas.repec.org/a/gam/jsusta/v13y2021i5p2712-d509449.html
   My bibliography  Save this article

Risk Assessment and Control Strategy of Residual Coal Pillar in Room Mining: Case Study in Ecologically Fragile Mining Areas, China

Author

Listed:
  • Hengfeng Liu

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

  • Qiang Sun

    (State Key Laboratory of Coal Resources and Safe Mining, School of Mines, China University of Mining & Technology, Xuzhou 221116, China
    State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining & Technology, Xuzhou 221116, China)

  • Nan Zhou

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

  • Zhongya Wu

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

Abstract

Gradual instability of coal pillars left behind underground with room mining is one of the main reasons for sudden roof caving in the gob, surface subsidence, and other significant hazards. Moreover, room mining implies great losses of coal resources. In this paper, the main failure mode and room mining coal pillar process were analyzed according to the coalfield regional engineering geological and hydrogeological conditions. A numerical model was adopted to study the effect of different sizes of coal mining pillars and progressive instability failure of coal pillar on the plastic zone’s evolution characteristics and stress field of coal pillars in the stope. The proposed technologies of cemented paste backfilling and reinforcement of residual coal pillars are applied, and a numerical simulation model is established to study the strata movement characteristics and analyze the stability degree of residual coal pillar and key aquiclude strata in the Pliocene series of Neogene. Consequently, the performance and application prospect were evaluated. The results obtained substantiate a new method for the long-term stability control of coal pillars in room mining and protecting the ecological environment in China’s western eco-environmental frangible area.

Suggested Citation

  • Hengfeng Liu & Qiang Sun & Nan Zhou & Zhongya Wu, 2021. "Risk Assessment and Control Strategy of Residual Coal Pillar in Room Mining: Case Study in Ecologically Fragile Mining Areas, China," Sustainability, MDPI, vol. 13(5), pages 1-13, March.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:5:p:2712-:d:509449
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/2071-1050/13/5/2712/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/2071-1050/13/5/2712/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Ebrahim Ghasemi & Mohammad Ataei & Kourosh Shahriar, 2014. "Prediction of global stability in room and pillar coal mines," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 72(2), pages 405-422, June.
    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. Yongqiang Zhang & Xiangyu Wang & Feiteng Zhang & Menglong Li & Guanghui Wang & Dingchao Chen & Guanjun Li & Xiangqian Zhao, 2023. "Retracement Ground Pressure Appearance and Control of the Working Face under the Overlying Residual Pillar: A Case Study," Energies, MDPI, vol. 16(4), pages 1-21, February.
    2. Wenda Wu & Guorui Feng & Xiuxiu Yu & Jianbiao Bai & Xiangyu Wang & Xiangzhuo Zhao, 2023. "Investigation into Pressure Appearances and Hydraulic Fracturing Roof-Cutting Technology in Mining Working Face under Residual Pillars: A Case Study," Energies, MDPI, vol. 16(9), pages 1, May.

    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. Ning Li & Masoud Zare & Congke Yi & Rafael Jimenez, 2022. "Stability Risk Assessment of Underground Rock Pillars Using Logistic Model Trees," IJERPH, MDPI, vol. 19(4), pages 1-19, February.
    2. Hengjie Luan & Huili Lin & Yujing Jiang & Yahua Wang & Jiankang Liu & Pu Wang, 2018. "Risks Induced by Room Mining Goaf and Their Assessment: A Case Study in the Shenfu-Dongsheng Mining Area," Sustainability, MDPI, vol. 10(3), pages 1-17, February.
    3. Guojian Zhang & Zhiyang Wang & Guangli Guo & Wei Wei & Fugang Wang & Leilei Zhong & Yaqiang Gong, 2022. "Study on Regional Strata Movement during Deep Mining of Erdos Coal Field and Its Control," IJERPH, MDPI, vol. 19(22), pages 1-32, November.
    4. Weizhang Liang & Suizhi Luo & Guoyan Zhao & Hao Wu, 2020. "Predicting Hard Rock Pillar Stability Using GBDT, XGBoost, and LightGBM Algorithms," Mathematics, MDPI, vol. 8(5), pages 1-17, May.

    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:13:y:2021:i:5:p:2712-:d:509449. 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.