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Numerical Analysis of Roadway Rock-Burst Hazard under Superposed Dynamic and Static Loads

Author

Listed:
  • Peng Kong

    (State Key Laboratory of Mining Disaster Prevention and Control, Shandong University of Science and Technology, Qingdao 266590, China)

  • Lishuai Jiang

    (State Key Laboratory of Mining Disaster Prevention and Control, Shandong University of Science and Technology, Qingdao 266590, China
    State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Beijing 100083, China)

  • Jinquan Jiang

    (State Key Laboratory of Mining Disaster Prevention and Control, Shandong University of Science and Technology, Qingdao 266590, China)

  • Yongning Wu

    (State Key Laboratory of Mining Disaster Prevention and Control, Shandong University of Science and Technology, Qingdao 266590, China)

  • Lianjun Chen

    (State Key Laboratory of Mining Disaster Prevention and Control, Shandong University of Science and Technology, Qingdao 266590, China)

  • Jianguo Ning

    (State Key Laboratory of Mining Disaster Prevention and Control, Shandong University of Science and Technology, Qingdao 266590, China)

Abstract

Microseismic events commonly occur during the excavation of long wall panels and often cause rock-burst accidents when the roadway is influenced by dynamic loads. In this paper, the Fast Lagrangian Analysis of Continua in 3-Dimensions (FLAC3D) software is used to study the deformation and rock-burst potential of roadways under different dynamic and static loads. The results show that the larger the dynamic load is, the greater the increase in the deformation of the roadway under the same static loading conditions. A roadway under a high static load is more susceptible to deformation and instability when affected by dynamic loads. Under different static loading conditions, the dynamic responses of the roadway abutment stress distribution are different. When the roadway is shallow buried and the dynamic load is small, the stress and elastic energy density of the coal body in the area of the peak abutment stress after the dynamic load are greater than the static calculations. The dynamic load provides energy storage for the coal body in the area of the peak abutment stress. When the roadway is deep, a small dynamic load can still cause the stress in the coal body and the elastic energy density to decrease in the area of the peak abutment stress, and a rock-burst is more likely to occur in a deep mine roadway with a combination of a high static load and a weak dynamic load. When the dynamic load is large, the peak abutment stress decreases greatly after the dynamic loading, and under the same dynamic loading conditions, the greater the depth the roadway is, the greater the elastic energy released by the dynamic load. Control measures are discussed for different dynamic and static load sources of rock-burst accidents. The results provide a reference for the control of rock-burst disasters under dynamic loads.

Suggested Citation

  • Peng Kong & Lishuai Jiang & Jinquan Jiang & Yongning Wu & Lianjun Chen & Jianguo Ning, 2019. "Numerical Analysis of Roadway Rock-Burst Hazard under Superposed Dynamic and Static Loads," Energies, MDPI, vol. 12(19), pages 1-19, September.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:19:p:3761-:d:272522
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    References listed on IDEAS

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    1. Zizheng Zhang & Xianyang Yu & Hai Wu & Min Deng, 2019. "Stability Control for Gob-Side Entry Retaining with Supercritical Retained Entry Width in Thick Coal Seam Longwall Mining," Energies, MDPI, vol. 12(7), pages 1-16, April.
    2. Peng Kong & Lishuai Jiang & Jiaming Shu & Lu Wang, 2019. "Mining Stress Distribution and Fault-Slip Behavior: A Case Study of Fault-Influenced Longwall Coal Mining," Energies, MDPI, vol. 12(13), pages 1-24, June.
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    Cited by:

    1. Chun Yang & Keping Zhou & Zhichao Li & Xin Xiong & Yun Lin & Zengwu Luo, 2020. "Numerical Modeling on the Fracturing and Energy Evolution of Large Deep Underground Openings Subjected to Dynamic Disturbance," Energies, MDPI, vol. 13(22), pages 1-18, November.
    2. Haiping Zhang & Siqi Li & Zhuo Chen & Yeshuang Tong & Zhuolun Li & Siqi Wang, 2022. "Fracture Mechanism of Crack-Containing Strata under Combined Static and Harmonic Dynamic Loads Based on Extended Finite Elements," Energies, MDPI, vol. 15(21), pages 1-14, October.
    3. Hanna Michalak & Paweł Przybysz, 2021. "The Use of 3D Numerical Modeling in Conceptual Design: A Case Study," Energies, MDPI, vol. 14(16), pages 1-21, August.
    4. Feng Cui & Tinghui Zhang & Xingping Lai & Jiantao Cao & Pengfei Shan, 2019. "Study on the Evolution Law of Overburden Breaking Angle under Repeated Mining and the Application of Roof Pressure Relief," Energies, MDPI, vol. 12(23), pages 1-20, November.
    5. Jianju Ren & Wenlong Zhang & Hongmei Zhang & Honggang Kou, 2022. "Occurrence Location and Propagation Inconformity Characteristics of Vibration Events in a Heading Face ofa Coal Mine," IJERPH, MDPI, vol. 19(22), pages 1-12, November.
    6. Guangliang Feng & Manqing Lin & Yang Yu & Yu Fu, 2020. "A Microseismicity-Based Method of Rockburst Intensity Warning in Deep Tunnels in the Initial Period of Microseismic Monitoring," Energies, MDPI, vol. 13(11), pages 1-15, May.

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