IDEAS home Printed from https://ideas.repec.org/a/gam/jsusta/v9y2017i11p2079-d118522.html
   My bibliography  Save this article

Analysis and Optimization of Entry Stability in Underground Longwall Mining

Author

Listed:
  • Yubing Gao

    (State Key Laboratory of Geomechanics & Deep Underground Engineering, China University of Mining & Technology, Beijing 100083, China
    School of Mechanics and Civil Engineering, China University of Mining & Technology, Beijing 100083, China)

  • Dongqiao Liu

    (State Key Laboratory of Geomechanics & Deep Underground Engineering, China University of Mining & Technology, Beijing 100083, China
    School of Mechanics and Civil Engineering, China University of Mining & Technology, Beijing 100083, China)

  • Xingyu Zhang

    (State Key Laboratory of Geomechanics & Deep Underground Engineering, China University of Mining & Technology, Beijing 100083, China
    School of Mechanics and Civil Engineering, China University of Mining & Technology, Beijing 100083, China)

  • Manchao He

    (State Key Laboratory of Geomechanics & Deep Underground Engineering, China University of Mining & Technology, Beijing 100083, China)

Abstract

For sustainable utilization of limited coal resources, it is important to increase the coal recovery rate and reduce mine accidents, especially those occurring in the entry (gateroad). Entry stabilities are vital for ventilation, transportation and other essential services in underground coal mining. In the present study, a finite difference model was built to investigate stress evolutions around the entry, and true triaxial tests were carried out at the laboratory to explore entry wall stabilities under different mining conditions. The modeling and experimental results indicated that a wide coal pillar was favorable for entry stabilities, but oversize pillars caused a serious waste of coal resources. As the width of the entry wall decreased, the integrated vertical stress, induced by two adjacent mining panels, coupled with each other and experienced an increase on the entry wall, which inevitably weakened the stability of the entry. Therefore, mining with coal pillars always involves a tradeoff between economy and safety. To address this problem, an innovative non-pillar mining technique by optimizing the entry surrounding structures was proposed. Numerical simulation showed that the deformation of the entry roof decreased by approximately 66% after adopting the new approach, compared with that using the conventional mining method. Field monitoring indicated that the stress condition of the entry was significantly improved and the average roof pressure decreased by appropriately 60.33% after adopting the new technique. This work provides an economical and effective approach to achieve sustainable exploitation of underground coal resources.

Suggested Citation

  • Yubing Gao & Dongqiao Liu & Xingyu Zhang & Manchao He, 2017. "Analysis and Optimization of Entry Stability in Underground Longwall Mining," Sustainability, MDPI, vol. 9(11), pages 1-19, November.
    • Handle: RePEc:gam:jsusta:v:9:y:2017:i:11:p:2079-:d:118522
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/2071-1050/9/11/2079/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/2071-1050/9/11/2079/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Su, Fa-qiang & Itakura, Ken-ichi & Deguchi, Gota & Ohga, Koutarou, 2017. "Monitoring of coal fracturing in underground coal gasification by acoustic emission techniques," Applied Energy, Elsevier, vol. 189(C), pages 142-156.
    2. Lechner, Alex Mark & Kassulke, Owen & Unger, Corinne, 2016. "Spatial assessment of open cut coal mining progressive rehabilitation to support the monitoring of rehabilitation liabilities," Resources Policy, Elsevier, vol. 50(C), pages 234-243.
    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. Dacian Paul Marian & Ilie Onica & Ramona-Rafila Marian & Dacian-Andrei Floarea, 2020. "Finite Element Analysis of the State of Stresses on the Structures of Buildings Influenced by Underground Mining of Hard Coal Seams in the Jiu Valley Basin (Romania)," Sustainability, MDPI, vol. 12(4), pages 1-25, February.
    2. Dacian-Paul Marian & Ilie Onica, 2021. "Analysis of the Geomechanical Phenomena That Led to the Appearance of Sinkholes at the Lupeni Mine, Romania, in the Conditions of Thick Coal Seams Mining with Longwall Top Coal Caving," Sustainability, MDPI, vol. 13(11), pages 1-27, June.
    3. Zimin Ma & Jiong Wang & Manchao He & Yubing Gao & Jinzhu Hu & Qiong Wang, 2018. "Key Technologies and Application Test of an Innovative Noncoal Pillar Mining Approach: A Case Study," Energies, MDPI, vol. 11(10), pages 1-22, October.
    4. Xingen Ma & Manchao He & Jiong Wang & Yubing Gao & Daoyong Zhu & Yuxing Liu, 2018. "Mine Strata Pressure Characteristics and Mechanisms in Gob-Side Entry Retention by Roof Cutting under Medium-Thick Coal Seam and Compound Roof Conditions," Energies, MDPI, vol. 11(10), pages 1-25, September.
    5. Xiaojie Yang & Eryu Wang & Yajun Wang & Yubing Gao & Pu Wang, 2018. "A Study of the Large Deformation Mechanism and Control Techniques for Deep Soft Rock Roadways," Sustainability, MDPI, vol. 10(4), pages 1-20, April.
    6. Gangye Guo & Hongpu Kang & Deyu Qian & Fuqiang Gao & Yang Wang, 2018. "Mechanism for Controlling Floor Heave of Mining Roadways Using Reinforcing Roof and Sidewalls in Underground Coal Mine," Sustainability, MDPI, vol. 10(5), pages 1-15, May.
    7. Yajun Wang & Yubing Gao & Eryu Wang & Manchao He & Jun Yang, 2018. "Roof Deformation Characteristics and Preventive Techniques Using a Novel Non-Pillar Mining Method of Gob-Side Entry Retaining by Roof Cutting," Energies, MDPI, vol. 11(3), pages 1-17, March.
    8. Jun Yang & Hongyu Wang & Yajun Wang & Binhui Liu & Shilin Hou & Yu Cheng, 2019. "Stability Analysis of the Entry in a New Mining Approach Influenced by Roof Fracture Position," Sustainability, MDPI, vol. 11(22), pages 1-16, November.
    9. Dong Wang & Yujing Jiang & Xiaoming Sun & Hengjie Luan & Hui Zhang, 2019. "Nonlinear Large Deformation Mechanism and Stability Control of Deep Soft Rock Roadway: A Case Study in China," Sustainability, MDPI, vol. 11(22), pages 1-20, November.
    10. Tieliang An & Xigui Zheng & Dengxing Zhu & Deyu Qian & Yu Guo & Juncai Cao, 2019. "Experimental investigation of pretensioned bolts under cyclic loading: Damage assessment using acoustic emission," International Journal of Distributed Sensor Networks, , vol. 15(5), pages 15501477198, May.
    11. Zhibiao Guo & Weitao Li & Songyang Yin & Dongshan Yang & Zhibo Ma, 2021. "An Innovative Technology for Monitoring the Distribution of Abutment Stress in Longwall Mining," Energies, MDPI, vol. 14(2), pages 1-22, January.
    12. Deyu Qian & Nong Zhang & Dongjiang Pan & Zhengzheng Xie & Hideki Shimada & Yang Wang & Chenghao Zhang & Nianchao Zhang, 2017. "Stability of Deep Underground Openings through Large Fault Zones in Argillaceous Rock," Sustainability, MDPI, vol. 9(11), pages 1-28, November.
    13. Qizhi Chen & Baoping Zou & Zhigang Tao & Manchao He & Bo Hu, 2023. "Construction and Application of an Intelligent Roof Stability Evaluation System for the Roof-Cutting Non-Pillar Mining Method," Sustainability, MDPI, vol. 15(3), pages 1-17, February.
    14. Hengjie Luan & Yujing Jiang & Huili Lin & Guofeng Li, 2018. "Development of a New Gob-Side Entry-Retaining Approach and Its Application," Sustainability, MDPI, vol. 10(2), pages 1-15, February.
    15. Qiu-Ping Bi & Yu-Cheng Li & Cheng Shen, 2021. "Screening of Evaluation Index and Construction of Evaluation Index System for Mine Ventilation System," Sustainability, MDPI, vol. 13(21), pages 1-15, October.
    16. Lifeng Li & Gan Li & Weili Gong & Jiong Wang & Huilin Deng, 2019. "Energy Evolution Pattern and Roof Control Strategy in Non-Pillar Mining Method of Goaf-Side Entry Retaining by Roof Cutting—A Case Study," Sustainability, MDPI, vol. 11(24), pages 1-18, December.

    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. Wilhelm Jan Tic & Joanna Guziałowska-Tic, 2019. "The Effect of Modifiers and Method of Application on Fine-Coal Combustion," Energies, MDPI, vol. 12(23), pages 1-15, November.
    2. Galina Nyashina & Pavel Strizhak, 2018. "Impact of Forest Fuels on Gas Emissions in Coal Slurry Fuel Combustion," Energies, MDPI, vol. 11(9), pages 1-16, September.
    3. Su, Fa-qiang & He, Xiao-long & Dai, Meng-jia & Yang, Jun-nan & Hamanaka, Akihiro & Yu, Yi-he & Li, Wen & Li, Jiao-yuan, 2023. "Estimation of the cavity volume in the gasification zone for underground coal gasification under different oxygen flow conditions," Energy, Elsevier, vol. 285(C).
    4. Su, Fa-qiang & Wu, Jun-bo & Tao-Zhang, & Deng, Qi-chao & Yu, Yi-he & Hamanaka, Akihiro & Dai, Meng-Jia & Yang, Jun-Nan & He, Xiao-long, 2023. "Study on the monitoring method of cavity growth in underground coal gasification under laboratory conditions," Energy, Elsevier, vol. 263(PE).
    5. Bryan Salgado-Almeida & Daniel A. Falquez-Torres & Paola L. Romero-Crespo & Priscila E. Valverde-Armas & Fredy Guzmán-Martínez & Samantha Jiménez-Oyola, 2022. "Risk Assessment of Mining Environmental Liabilities for Their Categorization and Prioritization in Gold-Mining Areas of Ecuador," Sustainability, MDPI, vol. 14(10), pages 1-17, May.
    6. Everingham, Jo-Anne & Rolfe, John & Lechner, Alex Mark & Kinnear, Susan & Akbar, Delwar, 2018. "A proposal for engaging a stakeholder panel in planning post-mining land uses in Australia’s coal-rich tropical savannahs," Land Use Policy, Elsevier, vol. 79(C), pages 397-406.
    7. De Valck, Jeremy & Williams, Galina & Kuik, Swee, 2021. "Does coal mining benefit local communities in the long run? A sustainability perspective on regional Queensland, Australia," Resources Policy, Elsevier, vol. 71(C).
    8. Manchao He & Yubing Gao & Jun Yang & Weili Gong, 2017. "An Innovative Approach for Gob-Side Entry Retaining in Thick Coal Seam Longwall Mining," Energies, MDPI, vol. 10(11), pages 1-22, November.
    9. Fa-qiang Su & Akihiro Hamanaka & Ken-ichi Itakura & Gota Deguchi & Wenyan Zhang & Hua Nan, 2018. "Evaluation of a Compact Coaxial Underground Coal Gasification System Inside an Artificial Coal Seam," Energies, MDPI, vol. 11(4), pages 1-11, April.
    10. Weyer, Vanessa D. & Truter, Wayne F. & Lechner, Alex M. & Unger, Corinne J., 2017. "Surface-strip coal mine land rehabilitation planning in South Africa and Australia: Maturity and opportunities for improvement," Resources Policy, Elsevier, vol. 54(C), pages 117-129.
    11. Izabela Jonek-Kowalska & Marian Turek, 2017. "Dependence of Total Production Costs on Production and Infrastructure Parameters in the Polish Hard Coal Mining Industry," Energies, MDPI, vol. 10(10), pages 1-22, September.
    12. Yiming Yang & Ting Ai & Zetian Zhang & Ru Zhang & Li Ren & Jing Xie & Zhaopeng Zhang, 2020. "Acoustic Emission Characteristics of Coal Samples under Different Stress Paths Corresponding to Different Mining Layouts," Energies, MDPI, vol. 13(12), pages 1-13, June.
    13. Qiu-Ping Bi & Yu-Cheng Li & Cheng Shen, 2021. "Screening of Evaluation Index and Construction of Evaluation Index System for Mine Ventilation System," Sustainability, MDPI, vol. 13(21), pages 1-15, October.
    14. Anna Kopeć & Paweł Trybała & Dariusz Głąbicki & Anna Buczyńska & Karolina Owczarz & Natalia Bugajska & Patrycja Kozińska & Monika Chojwa & Agata Gattner, 2020. "Application of Remote Sensing, GIS and Machine Learning with Geographically Weighted Regression in Assessing the Impact of Hard Coal Mining on the Natural Environment," Sustainability, MDPI, vol. 12(22), pages 1-26, November.
    15. Yuteng Xiao & Jihang Yin & Yifan Hu & Junzhe Wang & Hongsheng Yin & Honggang Qi, 2019. "Monitoring and Control in Underground Coal Gasification: Current Research Status and Future Perspective," Sustainability, MDPI, vol. 11(1), pages 1-14, January.
    16. Hao Liu & Xiaoquan Li & Xiaoyan Liu & Yunjie Sun & Zhiwen Yang & Yuankun Zhong, 2023. "Rule Study on the Risk of Floor Water Inrush Based on the Plate Model Theory," Sustainability, MDPI, vol. 15(10), pages 1-17, May.
    17. Zenon Pilecki & Robert Hildebrandt & Krzysztof Krawiec & Elżbieta Pilecka & Zbigniew Lubosik & Tomasz Łątka, 2023. "Assessment of Combustion Cavern Geometry in Underground Coal Gasification Process with the Use of Borehole Ground-Penetrating Radar," Energies, MDPI, vol. 16(18), pages 1-14, September.
    18. Jing, Zhaorui & Wang, Jinman & Tang, Qian & Liu, Biao & Niu, Hebin, 2021. "Evolution of land use in coal-based cities based on the ecological niche theory: A case study in Shuozhou City, China," Resources Policy, Elsevier, vol. 74(C).
    19. Xiang Fan & Yanjun Guan & Zhongke Bai & Wei Zhou & Chuxin Zhu, 2022. "Optimization of Reclamation Measures in a Mining Area by Analysis of Variations in Soil Nutrient Grades under Different Types of Land Usage—A Case Study of Pingshuo Coal Mine, China," Land, MDPI, vol. 11(3), pages 1-19, February.
    20. Su, Fa-qiang & Hamanaka, Akihiro & Itakura, Ken-ichi & Zhang, Wenyan & Deguchi, Gota & Sato, Kohki & Takahashi, Kazuhiro & Kodama, Jun-ichi, 2018. "Monitoring and evaluation of simulated underground coal gasification in an ex-situ experimental artificial coal seam system," Applied Energy, Elsevier, vol. 223(C), pages 82-92.

    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:9:y:2017:i:11:p:2079-:d:118522. 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.