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Stabilization of Gob-Side Entry with an Artificial Side for Sustaining Mining Work

Author

Listed:
  • Hong-sheng Wang

    (School of Energy Engineering, Xi’an University of Science and Technology, Key Laboratory of Western Mine Exploitation and Hazard Prevention with Ministry of Education, Xi’an 710054, China)

  • Dong-sheng Zhang

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

  • Lang Liu

    (School of Energy Engineering, Xi’an University of Science and Technology, Key Laboratory of Western Mine Exploitation and Hazard Prevention with Ministry of Education, Xi’an 710054, China)

  • Wei-bin Guo

    (School of Energy Engineering, Xi’an University of Science and Technology, Key Laboratory of Western Mine Exploitation and Hazard Prevention with Ministry of Education, Xi’an 710054, China)

  • Gang-wei Fan

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

  • KI-IL Song

    (Department of Civil Engineering, Inha University, Incheon 402-751, Korea)

  • Xu-feng Wang

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

Abstract

A concrete artificial side (AS) is introduced to stabilize a gob-side entry (GSE). To evaluate the stability of the AS, a uniaxial compression failure experiment was conducted with large and small-scale specimens. The distribution characteristics of the shear stress were obtained from a numerical simulation. Based on the failure characteristics and the variation of the shear stress, a failure criterion was determined and implemented in the strengthening method for the artificial side. In an experimental test, the distribution pattern of the maximum shear stress showed an X shape, which contributed to the failure shape of the specimen. The shear stress distribution and failure shape are induced by a combination of two sets of shear stresses, which implies that failure of the AS follows the twin shear strength theory. The use of anchor bolts, bolts, and anchor bars enhances the shear strength of the artificial side. When this side is stable, the components can constrain the lateral deformation as well as improve the internal friction angle and cohesion. When the AS is damaged, the components prevent the sliding of broken blocks along the shear failure plane and improve the residual strength of the artificial side. When reinforced with an anchor bar, the AS is still stable even after mining operations for three years.

Suggested Citation

  • Hong-sheng Wang & Dong-sheng Zhang & Lang Liu & Wei-bin Guo & Gang-wei Fan & KI-IL Song & Xu-feng Wang, 2016. "Stabilization of Gob-Side Entry with an Artificial Side for Sustaining Mining Work," Sustainability, MDPI, vol. 8(7), pages 1-17, July.
    • Handle: RePEc:gam:jsusta:v:8:y:2016:i:7:p:627-:d:73321
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    Citations

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    Cited by:

    1. Zhiyi Zhang & Hideki Shimada, 2018. "Numerical Study on the Effectiveness of Grouting Reinforcement on the Large Heaving Floor of the Deep Retained Goaf-Side Gateroad: A Case Study in China," Energies, MDPI, vol. 11(4), pages 1-15, April.
    2. Zhijun Tian & Zizheng Zhang & Min Deng & Shuai Yan & Jianbiao Bai, 2020. "Gob-Side Entry Retained with Soft Roof, Floor, and Seam in Thin Coal Seams: A Case Study," Sustainability, MDPI, vol. 12(3), pages 1-22, February.
    3. 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.
    4. Zhiyi Zhang & Hideki Shimada & Takashi Sasaoka & Akihiro Hamanaka, 2017. "Stability Control of Retained Goaf-Side Gateroad under Different Roof Conditions in Deep Underground Y Type Longwall Mining," Sustainability, MDPI, vol. 9(10), pages 1-19, September.
    5. 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.

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