IDEAS home Printed from https://ideas.repec.org/a/gam/jeners/v16y2023i11p4379-d1157937.html
   My bibliography  Save this article

Study on the Mechanism of Surrounding Rock Deformation and Its Control for Roof Cutting Retained Gob-Side Entry in Close-Distance Coal Seams Co-Mining

Author

Listed:
  • Yongkang Yang

    (Key Laboratory of In-Situ Property-Improving Mining of Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China
    State Key Laboratory of Coal Resources and Safe Mining, China University of Mining & Technology (Beijing), Beijing 100083, China)

  • Xuecong Xu

    (Key Laboratory of In-Situ Property-Improving Mining of Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China)

  • Chenlong Wang

    (Key Laboratory of In-Situ Property-Improving Mining of Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China)

Abstract

Sustainable development in coal mining requires a continuous and efficient method of coal extraction. Research shows that gob-side entries retained through roof cutting retained gob-side (RCGE) are vital for improving mining efficiency, enhancing coal recovery rates, and enabling continuous production. However, the mechanism of surrounding rock deformation during close-distance co-mining of coal seams with this technique is not yet clear. For the Jiaokou coal mine in China, due to an unreasonable stagger distance between upper and lower working faces, the gob-side entries retained at the 9102 tailgate and 10102 headgate experience severe rock pressure, leading to significant prop damage and a sharp reduction in the cross-section of the entry. This greatly hampers the reuse of these entries. To investigate this issue, we established a model to study the stress distribution of surrounding rocks at different stagger distances (20 m, 40 m, 60 m, 80 m, and 120 m) through numerical simulation and optimized the support parameters for the retained entries. Our research found that when the subsidence of the roof in the upper coal seam exceeds 0.74 m but is less than 1.33 m, there is sliding instability in the mining body. When the subsidence exceeds 1.33 m, the mining body will rotate and deform, causing significant mining pressure within the retained entry. A stagger distance of 40 m between the upper and lower working faces can reduce pressure on the face during the mining of the lower coal seam. Extensive field measurements of rock pressure revealed that the damage rate of the single column in the gob-side entries of the upper and lower coal seams does not exceed 5% and 1%, respectively. In summary, this study provides a practical method to reduce damage to entries during the mining process, thereby increasing the continuous production capability of the coal mine. This is critical for the sustainable development of coal mining.

Suggested Citation

  • Yongkang Yang & Xuecong Xu & Chenlong Wang, 2023. "Study on the Mechanism of Surrounding Rock Deformation and Its Control for Roof Cutting Retained Gob-Side Entry in Close-Distance Coal Seams Co-Mining," Energies, MDPI, vol. 16(11), pages 1-17, May.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:11:p:4379-:d:1157937
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1996-1073/16/11/4379/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/1996-1073/16/11/4379/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Krzysztof Skrzypkowski & Waldemar Korzeniowski & Krzysztof Zagórski & Anna Zagórska, 2019. "Flexibility and Load-Bearing Capacity of Roof Bolting as Functions of Mounting Depth and Hole Diameter," Energies, MDPI, vol. 12(19), pages 1-23, September.
    2. Krzysztof Skrzypkowski, 2020. "Case Studies of Rock Bolt Support Loads and Rock Mass Monitoring for the Room and Pillar Method in the Legnica-Głogów Copper District in Poland," Energies, MDPI, vol. 13(11), pages 1-20, June.
    3. Kai Wang & Yanli Huang & Huadong Gao & Wen Zhai & Yongfeng Qiao & Junmeng Li & Shenyang Ouyang & Wei Li, 2020. "Recovery Technology of Bottom Coal in the Gob-Side Entry of Thick Coal Seam Based on Floor Heave Induced by Narrow Coal Pillar," Energies, MDPI, vol. 13(13), pages 1-20, July.
    4. 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.
    5. Krzysztof Skrzypkowski, 2019. "The Influence of Room and Pillar Method Geometry on the Deposit Utilization Rate and Rock Bolt Load," Energies, MDPI, vol. 12(24), pages 1-15, December.
    6. Alexander Vitalevich Martirosyan & Yury Valerievich Ilyushin, 2022. "The Development of the Toxic and Flammable Gases Concentration Monitoring System for Coalmines," Energies, MDPI, vol. 15(23), pages 1-13, 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.
    1. Krzysztof Skrzypkowski & Waldemar Korzeniowski & Krzysztof Zagórski & Anna Zagórska, 2020. "Modified Rock Bolt Support for Mining Method with Controlled Roof Bending," Energies, MDPI, vol. 13(8), pages 1-20, April.
    2. Krzysztof Skrzypkowski, 2021. "An Experimental Investigation into the Stress-Strain Characteristic under Static and Quasi-Static Loading for Partially Embedded Rock Bolts," Energies, MDPI, vol. 14(5), pages 1-17, March.
    3. Krzysztof Skrzypkowski, 2020. "Comparative Analysis of the Mining Cribs Models Filled with Gangue," Energies, MDPI, vol. 13(20), pages 1-18, October.
    4. Krzysztof Lalik & Ireneusz Dominik & Paweł Gut & Krzysztof Skrzypkowski & Waldemar Korzeniowski & Krzysztof Zagórski, 2021. "Non-Destructive Acoustical Rock Bolt Testing System with Intelligent Filtering in Salt Mine ‘Wieliczka’," Energies, MDPI, vol. 14(17), pages 1-16, September.
    5. Krzysztof Skrzypkowski & Waldemar Korzeniowski & Krzysztof Zagórski & Anna Zagórska, 2020. "Adjustment of the Yielding System of Mechanical Rock Bolts for Room and Pillar Mining Method in Stratified Rock Mass," Energies, MDPI, vol. 13(8), pages 1-23, April.
    6. Krzysztof Skrzypkowski, 2020. "Decreasing Mining Losses for the Room and Pillar Method by Replacing the Inter-Room Pillars by the Construction of Wooden Cribs Filled with Waste Rocks," Energies, MDPI, vol. 13(14), pages 1-20, July.
    7. Houqiang Yang & Changliang Han & Nong Zhang & Yuantian Sun & Dongjiang Pan & Changlun Sun, 2020. "Long High-Performance Sustainable Bolt Technology for the Deep Coal Roadway Roof: A Case Study," Sustainability, MDPI, vol. 12(4), pages 1-14, February.
    8. Benedetta Antonielli & Alessandra Sciortino & Stefano Scancella & Francesca Bozzano & Paolo Mazzanti, 2021. "Tracking Deformation Processes at the Legnica Glogow Copper District (Poland) by Satellite InSAR—I: Room and Pillar Mine District," Land, MDPI, vol. 10(6), pages 1-20, June.
    9. Xiaowei Guo & Xigui Zheng & Peng Li & Rui Lian & Cancan Liu & Niaz Muhammad Shahani & Cong Wang & Boyang Li & Wenjie Xu & Guowei Lai, 2021. "Full-Stress Anchoring Technology and Application of Bolts in the Coal Roadway," Energies, MDPI, vol. 14(22), pages 1-24, November.
    10. Artur Kozłowski & Łukasz Bołoz, 2021. "Design and Research on Power Systems and Algorithms for Controlling Electric Underground Mining Machines Powered by Batteries," Energies, MDPI, vol. 14(13), pages 1-21, July.
    11. Krzysztof Skrzypkowski, 2021. "Determination of the Backfilling Time for the Zinc and Lead Ore Deposits with Application of the BackfillCAD Model," Energies, MDPI, vol. 14(11), pages 1-19, May.
    12. Jianhang Chen & Ziwei Ding & Saisai Wu & Junwen Zhang, 2022. "Studying the Bond Performance of Full-Grouting Rock Bolts Based on the Variable Controlling Method," Energies, MDPI, vol. 15(9), pages 1-15, April.
    13. Shengrong Xie & Fangfang Guo & Yiyi Wu, 2022. "Control Techniques for Gob-Side Entry Driving in an Extra-Thick Coal Seam with the Influence of Upper Residual Coal Pillar: A Case Study," Energies, MDPI, vol. 15(10), pages 1-21, May.
    14. Piotr Małkowski & Łukasz Ostrowski & Łukasz Bednarek, 2020. "The Effect of Selected Factors on Floor Upheaval in Roadways—In Situ Testing," Energies, MDPI, vol. 13(21), pages 1-23, October.
    15. Yuanyuan Pu & Derek B. Apel & Stanislaw Prusek & Andrzej Walentek & Tomasz Cichy, 2021. "Back-analysis for initial ground stress field at a diamond mine using machine learning approaches," 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. 105(1), pages 191-203, January.
    16. Boris V. Malozyomov & Vladimir Ivanovich Golik & Vladimir Brigida & Vladislav V. Kukartsev & Yadviga A. Tynchenko & Andrey A. Boyko & Sergey V. Tynchenko, 2023. "Substantiation of Drilling Parameters for Undermined Drainage Boreholes for Increasing Methane Production from Unconventional Coal-Gas Collectors," Energies, MDPI, vol. 16(11), pages 1-16, May.
    17. Yongli Liu & Jingtao Li & Yanwei Duan & Tao Qin & Zhenwen Liu, 2023. "Study on the Influence of Roadway Structural Morphology on the Mechanical Properties of Weakly Cemented Soft Rock Roadways," Sustainability, MDPI, vol. 15(1), pages 1-16, January.
    18. Krzysztof Skrzypkowski, 2020. "Case Studies of Rock Bolt Support Loads and Rock Mass Monitoring for the Room and Pillar Method in the Legnica-Głogów Copper District in Poland," Energies, MDPI, vol. 13(11), pages 1-20, June.
    19. Yubing Huang & Bei Jiang & Yukun Ma & Huayong Wei & Jincheng Zang & Xiang Gao, 2021. "Study on Asymmetric Failure and Control Measures of Lining in Deep Large Section Chamber," Energies, MDPI, vol. 14(14), pages 1-14, July.
    20. 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.

    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:16:y:2023:i:11:p:4379-:d:1157937. 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.