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Protection Technique of Support System for Dynamic Disaster in Deep Underground Engineering: A Case Study

Author

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  • Yunqiu Liu

    (State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, China
    Sionsteel Maanshan General Institute of Mining Research Co., Ltd., Maanshan 243000, China)

  • Yuemao Zhao

    (College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China)

  • Kun Wang

    (College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China)

  • Gongcheng Li

    (School of Resources and Environmental Engineering, Shandong University of Technology, Zibo 255049, China)

  • Zhengchen Ge

    (College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China)

Abstract

During excavation in a deep tunnel, dynamic disaster is an extremely severe impact failure. The necessity of an energy-absorbing support system is analyzed for different characteristics of dynamic disaster (rockburst) failure. The energy-absorbing support system design includes a combination of early-warning, energy-absorbing bolts, and other components. This support system is designed to meet the energy requirement of a rockburst disaster based on an early warning. The energy-absorbing rockbolt uses the stepwise decoupling technique to realize the brittle-ductile transition of the structure, which is referred to as a stepwise decoupling rockbolt (SD-bolt). The ultimate force, ultimate deformation, and energy were calculated as 241 kN, 442.3 mm, and 95.89 kJ under static pull-out load. Monitored by a microseismic system, the support system was tested by moderate rockburst disaster impact on site. Considering similar rockburst disaster failure cases, this energy-absorbing support system can reduce rockburst disaster damage to a certain extent and improve overall safety during deep engineering construction.

Suggested Citation

  • Yunqiu Liu & Yuemao Zhao & Kun Wang & Gongcheng Li & Zhengchen Ge, 2023. "Protection Technique of Support System for Dynamic Disaster in Deep Underground Engineering: A Case Study," Sustainability, MDPI, vol. 15(9), pages 1-13, April.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:9:p:7165-:d:1132407
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