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Research on Excavation and Stability of Deep High Stress Chamber Group: A Case Study of Anju Coal Mine

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Abstract

As the underground transportation hub and power center, the stability of chamber group is one of the key points of coal mine construction. With the increasing of mining depth, it is more and more difficult to control the stability of roadway and chamber in coal mine, especially in the mining process. Because the excavation of chamber group is a dynamic and multi factor coupling process of, it is necessary to adopt dynamic construction mechanics to optimize the excavation scheme. Therefore, based on the engineering background of − 1155 m level at Anju coal mine in Shandong, the numerical model of deep high stress chamber group is established. Then the interaction of adjacent roadways in the process of excavation and the stress superposition of chamber intersection are studied. The excavation process of the chamber group is divided into three phases, and the construction optimization scheme is formulated. Through numerical simulation, the stress and plastic zone of each excavation scheme are analyzed, and the optimal construction sequence of each phase is determined. Finally, through the field implementation and engineering application, the optimal excavation scheme of tunnel group design is proved. The results provide a scientific basis for the excavation of deep high stress caverns and the improvement of surrounding rock support. At the same time, it also has a good reference significance for other similar underground engineering.

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Data Availability Statement

All data used to support the findings of this study are available from the corresponding author upon request.

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Acknowledgements

This work was supported by the National Outstanding Youth Science Fund Project of National Natural Science Foundation of China (CN), 51704180, research on bending failure mechanism of reinforced concrete filled steel tubular support under uneven load, Jinxiao Liu (skd993938@sdust.edu.cn).

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Authors and Affiliations

  1. College of Energy and Mining Engineering, Shandong University of Science and Technology, 579 Qianwangang Rd, Huangdao District, Qingdao, 266590, People’s Republic of China

    Feng Zhang, Jinxiao Liu & Yongle Liu

  2. Mine Disaster Prevention and Control-Ministry of State Key Laboratory Breeding Base, Shandong University of Science and Technology, 579 Qianwangang Rd, Huangdao District, Qingdao, 266590, People’s Republic of China

    Jinxiao Liu

  3. College of Environment and Safety Engineering, Shandong University of Science and Technology, 579 Qianwangang Rd, Huangdao District, Qingdao, 266590, People’s Republic of China

    Xu Zhang & Haiming Ni

  4. State Key Laboratory of Mining Disaster Prevention and Control Co-Founded By Shandong Province and the Ministry of Science and Technology, National Engineering Laboratory for Backfill Coal Mining, Shandong University of Science and Technology, Qingdao, 266590, People’s Republic of China

    Jinxiao Liu

Authors
  1. Feng Zhang
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  2. Jinxiao Liu
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  3. Xu Zhang
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  4. Haiming Ni
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  5. Yongle Liu
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Contributions

FZ performed manuscript preparation, the data analyses and wrote the manuscript; JL contributed to the conception of the study; XZ performed the experiment and numerical simulation; HN performed sorting of data; YL helped perform the analysis with constructive discussions.

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Correspondence to Feng Zhang.

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Zhang, F., Liu, J., Zhang, X. et al. Research on Excavation and Stability of Deep High Stress Chamber Group: A Case Study of Anju Coal Mine. Geotech Geol Eng 39, 3611–3626 (2021). https://doi.org/10.1007/s10706-021-01714-1

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  • DOI: https://doi.org/10.1007/s10706-021-01714-1

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