IDEAS home Printed from https://ideas.repec.org/a/gam/jijerp/v20y2023i1p868-d1023469.html
   My bibliography  Save this article

Research on the Mechanism and Control Technology of Coal Wall Sloughing in the Ultra-Large Mining Height Working Face

Author

Listed:
  • Xuelong Li

    (State Key Laboratory of Mining Disaster Prevention and Control, College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China
    State and Local Joint Engineering Laboratory for Gas Drainage & Ground Control of Deep Mines, School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China)

  • Xinyuan Zhang

    (State Key Laboratory of Mining Disaster Prevention and Control, College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China)

  • Wenlong Shen

    (State and Local Joint Engineering Laboratory for Gas Drainage & Ground Control of Deep Mines, School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China)

  • Qingdong Zeng

    (State Key Laboratory of Mining Disaster Prevention and Control, College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China)

  • Peng Chen

    (School of Mine Safety, North China Institute of Science and Technology, Langfang 101601, China)

  • Qizhi Qin

    (Shandong Energy Group Co., Ltd., Jinan 250014, China)

  • Zhen Li

    (State Key Laboratory of Mining Disaster Prevention and Control, College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China)

Abstract

One of the primary factors affecting safe and effective mining in fully mechanized mining faces with large mining heights is coal wall sloughing. This paper establishes the mechanical model of the coal wall and uses the deflection theory for the mechanics of materials to find the maximum point of the deflection of the coal wall, which is the most easily deformed and damaged during the mining process, based on the mining production conditions of the 12-2up108 working face in the Jinjitan Coal Mine. In order to simulate the characteristics of the coal wall in the large mining height working face at various mining heights, the FLAC-3D numerical method was used. The stability of the mining area was assessed in conjunction with the multi-factor fuzzy comprehensive evaluation mathematical model, and the corresponding control of the coal wall was suggested. The study demonstrates that: (1) The working surface at Jinjitan Coal Mine 112-2up108 is a typical drum-out sloughing. The coal wall is most likely to sustain damage at the point where it contacts the roof when the frictional resistance between the coal seam and the roof and floor is less than the uniform load, and at 0.578 times the mining height when the frictional resistance between the coal seam and the roof and floor is greater than the uniform load. (2) In the working face with a large mining height, mining height of the coal wall is one of the significant influencing factors. With increasing mining height, the coal wall’s height also rises nonlinearly, as does the depth of the coal wall in the working face with the large mining height. The growth is linear. The coal wall’s maximum deflection value point moves up and the slab’s height significantly increases when the mining height exceeds 7.5 m. (3) The Jinjitan Coal Mine should be supported by a pressurized and enhanced composite support bracket with a support force greater than 0.245 MPa and a support plate of 3500 mm because it belongs to a Class I stable coal wall, according to a thorough evaluation of a multi-factor fuzzy mathematical model. The working face’s mining pressure is continuously and dynamically monitored, and the stress is released in a timely manner to prevent the occurrence of dynamic disasters.

Suggested Citation

  • Xuelong Li & Xinyuan Zhang & Wenlong Shen & Qingdong Zeng & Peng Chen & Qizhi Qin & Zhen Li, 2023. "Research on the Mechanism and Control Technology of Coal Wall Sloughing in the Ultra-Large Mining Height Working Face," IJERPH, MDPI, vol. 20(1), pages 1-17, January.
  • Handle: RePEc:gam:jijerp:v:20:y:2023:i:1:p:868-:d:1023469
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1660-4601/20/1/868/pdf
    Download Restriction: no

    File URL: https://www.mdpi.com/1660-4601/20/1/868/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Sheng Wang & Xuelong Li & Qizhi Qin, 2022. "Study on Surrounding Rock Control and Support Stability of Ultra-Large Height Mining Face," Energies, MDPI, vol. 15(18), pages 1-20, September.
    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. Huichen Xu & Xiaoming Sun & Yong Zhang & Chengwei Zhao & Chengyu Miao & Dong Wang, 2023. "Creep Characteristics of Layered Rock Masses after Water Absorption Due to Structural Effects," IJERPH, MDPI, vol. 20(5), pages 1-18, February.
    2. Xiaoyan Sun & Qican Ran & Hao Liu & Yanhao Ning & Tengfei Ma, 2023. "Characteristics of Stress-Displacement-Fracture Multi-Field Evolution around Gas Extraction Borehole," Energies, MDPI, vol. 16(6), pages 1-21, March.
    3. Fenghui Li & Yunhai Cheng & Xiufeng Zhang & Dong Li & Shunjie Huang, 2023. "A Study on Disasters Induced by Head-On Ejection in High-Speed Driving under the Influence of Roof Drainage," Sustainability, MDPI, vol. 15(11), pages 1-15, May.
    4. Xiaojun Feng & Zichuang Ai & Xuebo Zhang & Qilei Wei & Chenjun Du & Qiming Zhang & Chuan Deng, 2023. "Numerical Investigation of the Evolution of Gas and Coal Spontaneously Burned Composite Disaster in the Goaf of Steeply Inclined Coal Seam," Sustainability, MDPI, vol. 15(12), pages 1-17, June.
    5. Liu, Shumin & Sun, Haitao & Zhang, Dongming & Yang, Kun & Li, Xuelong & Wang, Dengke & Li, Yaning, 2023. "Experimental study of effect of liquid nitrogen cold soaking on coal pore structure and fractal characteristics," Energy, Elsevier, vol. 275(C).
    6. Zhenguo Yan & Huachuan Wang & Huicong Xu & Jingdao Fan & Weixi Ding, 2024. "Construction and Application of an Intelligent Prediction Model for the Coal Pillar Width of a Fully Mechanized Caving Face Based on the Fusion of Multiple Physical Parameters," Sustainability, MDPI, vol. 16(3), pages 1-14, January.
    7. Shouguo Yang & Ning Xu & Xiaofei Zhang, 2023. "Numerical Simulation Study on the Evolution Law of Stress and Crack in Coal Seam Hydraulic Fracturing," Sustainability, MDPI, vol. 15(14), pages 1-13, 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. Wenlong Li & Shihao Tu & Hongsheng Tu & Xun Liu & Kaijun Miao & Hongbin Zhao & Jieyang Ma & Long Tang & Yan Li, 2022. "A New Method to Assess Thick, Hard Roof-Induced Rock Burst Risk Based on Mining Speed Effect on Key Energy Strata," Sustainability, MDPI, vol. 14(22), pages 1-19, November.
    2. Mingkun Pang & Hongyu Pan & Hang Zhang & Tianjun Zhang, 2022. "Experimental Investigation of the Effect of Groundwater on the Relative Permeability of Coal Bodies around Gas Extraction Boreholes," IJERPH, MDPI, vol. 19(20), pages 1-21, October.
    3. Xiaoyan Sun & Qican Ran & Hao Liu & Yanhao Ning & Tengfei Ma, 2023. "Characteristics of Stress-Displacement-Fracture Multi-Field Evolution around Gas Extraction Borehole," Energies, MDPI, vol. 16(6), pages 1-21, March.
    4. Pang, Mingkun & Pan, Hongyu & Ji, Bingnan & Zhang, Hang & Zhang, Tianjun, 2023. "Experimental investigation of flow regime transition characteristics of fractured coal bodies around gas extraction boreholes," Energy, Elsevier, vol. 270(C).
    5. Jian Hao & Anfa Chen & Xuelong Li & Hua Bian & Guanghua Zhou & Zhenguo Wu & Linjun Peng & Jianquan Tang, 2022. "Analysis of Surrounding Rock Control Technology and Its Application on a Dynamic Pressure Roadway in a Thick Coal Seam," Energies, MDPI, vol. 15(23), pages 1-23, November.
    6. Rui Yu & Jiawei Qian & Liang Liu & Huasheng Zha & Nan Li, 2022. "Microseismic Precursors of Coal Mine Water Inrush Characterized by Different Waveforms Manifest as Dry to Wet Fracturing," IJERPH, MDPI, vol. 19(21), pages 1-12, November.
    7. Qiuping Li & Jie Liu & Shouqing Lu & Zaiquan Wang & Hao Wang & Yimeng Wu & Yupu Wang & Di Ying & Mingjie Li, 2022. "Influence of Confining Pressure on Nonlinear Failure Characteristics of Coal Subjected to Triaxial Compression," IJERPH, MDPI, vol. 20(1), pages 1-17, December.
    8. Zheyuan Feng & Qi Xu & Xinyu Luo & Ruyu Huang & Xin Liao & Qiang Tang, 2022. "Microstructure, Deformation Characteristics and Energy Analysis of Mudstone under Water Absorption Process," Energies, MDPI, vol. 15(20), pages 1-17, October.
    9. Li Cheng & Qinzheng Wu & Haotian Li & Kexu Chen & Chunlong Wang & Xingquan Liu & Xuelong Li & Jingjing Meng, 2022. "Safety and Protection Measures of Underground Non-Coal Mines with Mining Depth over 800 m: A Case Study in Shandong, China," Sustainability, MDPI, vol. 14(20), pages 1-16, October.

    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:jijerp:v:20:y:2023:i:1:p:868-:d:1023469. 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.