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Long High-Performance Sustainable Bolt Technology for the Deep Coal Roadway Roof: A Case Study

Author

Listed:
  • Houqiang Yang

    (Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, School of Mines, China University of Mining and Technology, Xuzhou 221116, China)

  • Changliang Han

    (Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, School of Mines, China University of Mining and Technology, Xuzhou 221116, China)

  • Nong Zhang

    (Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, School of Mines, China University of Mining and Technology, Xuzhou 221116, China)

  • Yuantian Sun

    (Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, School of Mines, China University of Mining and Technology, Xuzhou 221116, China)

  • Dongjiang Pan

    (State Key Laboratory of Shield Machine and Boring Technology, China Railway Tunnel Group Co., Ltd., Zhengzhou 450001, China)

  • Changlun Sun

    (Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, School of Mines, China University of Mining and Technology, Xuzhou 221116, China)

Abstract

High-efficiency maintenance and control of the deep coal roadway roof stability is a reliable guarantee for safe production and sustainable development of a coal mine. With belt haulage roadway 3108 in MenKeqing coal mine as the research background, in situ investigation, theoretical analysis, numerical simulation, and engineering practice were carried out to reveal the law of improving the bearing state of bolts by increasing the thickness of the roof anchoring layer. Also, the mechanism of the high-efficiency and long anchoring of the roof is revealed. Results show that increasing thickness of the roof anchorage layer could mobilize deep rock mass to participate in the bearing and promote the bolt to increase the resistance in a timely manner to limit the deformation of rock mass. Through the close link between shallow soft rock mass and deep stable rock mass, the deformation of the shallow rock mass is well controlled and so are the development and expansion of the roof separated fissures from shallow to deep. Long high-performance sustainable bolt technology for roof are proposed and carried out to control the stability of the deep roadway roof. Engineering practice indicates that deformations of roof could be efficiently controlled. The maximum deformations of the roof and sidewall-to-sidewall are 17 mm and 24 mm, respectively. No obvious separation fissures are found in the anchoring range of roof. This study provides a reference for roof stability control of deep roadway under similar conditions.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jsusta:v:12:y:2020:i:4:p:1375-:d:320111
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    References listed on IDEAS

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    1. Zhengzheng Xie & Nong Zhang & Yuxin Yuan & Guang Xu & Qun Wei, 2019. "Study on Safety Control of Composite Roof in Deep Roadway Based on Energy Balance Theory," Sustainability, MDPI, vol. 11(13), pages 1-18, July.
    2. 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.
    3. Guang Li & Fengshan Ma & Gang Liu & Haijun Zhao & Jie Guo, 2019. "A Strain-Softening Constitutive Model of Heterogeneous Rock Mass Considering Statistical Damage and Its Application in Numerical Modeling of Deep Roadways," Sustainability, MDPI, vol. 11(8), pages 1-19, April.
    4. Dongdong Qin & Xufeng Wang & Dongsheng Zhang & Xuyang Chen, 2019. "Study on Surrounding Rock-Bearing Structure and Associated Control Mechanism of Deep Soft Rock Roadway Under Dynamic Pressure," Sustainability, MDPI, vol. 11(7), pages 1-15, March.
    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. Zhengzheng Xie & Nong Zhang & Fanfei Meng & Changliang Han & Yanpei An & Ruojun Zhu, 2019. "Deformation Field Evolution and Failure Mechanisms of Coal–Rock Combination Based on the Digital Speckle Correlation Method," Energies, MDPI, vol. 12(13), pages 1-14, June.
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    Cited by:

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    3. Yang Wang & Nong Zhang & Wenda Wu & Juncai Cao & Yu Guo & Donghong Duan, 2022. "Damage Data Analysis of Deep Coal Roadway Roof and Application of Long Anchorage and Zone Linkage Support Technology," Sustainability, MDPI, vol. 14(13), pages 1-19, July.
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    5. Yuantian Sun & Guichen Li & Junfei Zhang & Junbo Sun & Jiandong Huang & Reza Taherdangkoo, 2021. "New Insights of Grouting in Coal Mass: From Small-Scale Experiments to Microstructures," Sustainability, MDPI, vol. 13(16), pages 1-17, August.

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