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Impact of Shear Zone on Rockburst in the Deep Neelum-Jehlum Hydropower Tunnel: A Numerical Modeling Approach

Author

Listed:
  • Abdul Muntaqim Naji

    (Department of Civil and Environmental Engineering, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan 15588, Korea)

  • Hafeezur Rehman

    (Department of Civil and Environmental Engineering, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan 15588, Korea)

  • Muhammad Zaka Emad

    (Department of Mining Engineering, University of Engineering and Technology, Lahore 54890, Pakistan)

  • Hankyu Yoo

    (Department of Civil and Environmental Engineering, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan 15588, Korea)

Abstract

Rockburst is a hazardous phenomenon in deep tunnels influenced by geological structural planes like faults, joints, and shear planes. Small-scale shear-plane-like structures have damaging impact on the boundaries of the tunnel, which act as barrier and accumulate high stresses. A shear plane combined with high stress conditions is very dangerous in deep excavations. Such a shear plane exposed in the side wall of the right headrace tunnel in the Neelum-Jehlum Hydropower Project. This project is constructed in the tectonically active Himalayas under high stress conditions. The influence of a shear zone on rockburst occurrence near the tunnel is studied. The FLAC 3D explicit code simulated the shear zone in the right tunnel, revealing that the stresses are concentrated near the shear zone, while no such stress concentration is present in the left tunnel. The Rock mass got displaced near this shear zone. Modeling results confirm that the presence of shear zone in side wall of the right tunnel has a major influence on rockburst occurrence. A shear slip along this plane released huge amounts of accumulated energy, causing human fatalities and property damage. A comparison of numerical simulation with empirical rockburst criteria validates the actual conditions and help us to understand the phenomenon of stress concentration near the shear zone and its impact during deep tunneling.

Suggested Citation

  • Abdul Muntaqim Naji & Hafeezur Rehman & Muhammad Zaka Emad & Hankyu Yoo, 2018. "Impact of Shear Zone on Rockburst in the Deep Neelum-Jehlum Hydropower Tunnel: A Numerical Modeling Approach," Energies, MDPI, vol. 11(8), pages 1-16, July.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:8:p:1935-:d:159850
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    References listed on IDEAS

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    1. Haochen Zhao & Rennie B. Kaunda, 2018. "Numerical Assessment of the Influences of Gas Pressure on Coal Burst Liability," Energies, MDPI, vol. 11(2), pages 1-13, January.
    2. Xiaofei Liu & Guang Xu & Chong Zhang & Biao Kong & Jifa Qian & Dong Zhu & Mingyao Wei, 2017. "Time Effect of Water Injection on the Mechanical Properties of Coal and Its Application in Rockburst Prevention in Mining," Energies, MDPI, vol. 10(11), pages 1-26, November.
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    Citations

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    Cited by:

    1. Jianyu Li & Hong Li & Zheming Zhu & Ye Tao & Chun’an Tang, 2021. "Numerical Study on Damage Zones Induced by Excavation and Ventilation in a High-Temperature Tunnel at Depth," Energies, MDPI, vol. 14(16), pages 1-20, August.
    2. Yintong Guo & Qiqi Ying & Duocai Wang & Hong Zhang & Famu Huang & Haitao Guo & Lei Hou & Mingnan Xu & Hejuan Liu & Debin Xia, 2022. "Experimental Study on Shear Characteristics of Structural Plane with Different Fluctuation Characteristics," Energies, MDPI, vol. 15(20), pages 1-17, October.
    3. Abdul Muntaqim Naji & Hafeezur Rehman & Muhammad Zaka Emad & Saeed Ahmad & Jung-joo Kim & Hankyu Yoo, 2019. "Static and Dynamic Influence of the Shear Zone on Rockburst Occurrence in the Headrace Tunnel of the Neelum Jhelum Hydropower Project, Pakistan," Energies, MDPI, vol. 12(11), pages 1-17, June.
    4. Zhe Liu & Jianhong Chen & Yakun Zhao & Shan Yang, 2023. "A Novel Method for Predicting Rockburst Intensity Based on an Improved Unascertained Measurement and an Improved Game Theory," Mathematics, MDPI, vol. 11(8), pages 1-18, April.
    5. Heng Zhang & Liang Chen & Shougen Chen & Jianchun Sun & Jiasong Yang, 2018. "The Spatiotemporal Distribution Law of Microseismic Events and Rockburst Characteristics of the Deeply Buried Tunnel Group," Energies, MDPI, vol. 11(12), pages 1-21, November.
    6. Zhiqiang Zhang & Chun Luo & Heng Zhang & Ruikai Gong, 2020. "Rockburst Identification Method Based on Energy Storage Limit of Surrounding Rock," Energies, MDPI, vol. 13(2), pages 1-24, January.

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