In order to better realize the rockburst disaster control mechanism and approach, the rockburst response of concrete blocks with different energy absorption levels under different energy storage conditions was observed and analyzed by loading tests. The occurrence and control mechanism of rockburst were explored from the perspective of energy aggregation and energy dissipation. On this basis, a combined energy absorption support system of concrete-filled steel tube frames and hollow steel pipes for rockburst disaster control was designed, and the effectiveness of the system was verified by numerical simulation and field tests. The results of loading tests show that the failure mode of the specimens changes from static failure to dynamic burst under energy storage loading. The occurrence of rockburst is inevitable when the energy supply is sufficient, but the disaster can be reduced or eliminated by strengthening constraints and improving energy-absorbing capacity to transform rockburst into large deformation. The combined structure consists of the hollow steel pipes being energy-absorbing part and the concrete-filled steel tube frames being strong confinement part was proposed to control rockburst disaster in tunnel support. The numerical analysis on the dynamic response of the support under strong rockburst impact shows that the hollow steel pipes effectively reduced the impact force on the concrete-filled tube frames, and accordingly, the deformation of the entire support system decreased. Given the condition that the hollow steel pipes be able to absorb all the impact energy during deformation, the smaller the strength of the hollow steel pipe is, the smaller the impact force and the displacement is. The combined energy absorption support provides an effective solution for rockburst disaster management in tunnels with strict clearance requirements.

中文翻译：

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隧道岩爆灾害防治综合吸能支护研究

为更好地实现岩爆灾害防治机理和途径，通过加载试验，对不同吸能水平混凝土砌块在不同储能条件下的岩爆响应进行了观测分析。从能量聚集和能量耗散的角度探讨了岩爆的发生和控制机制。在此基础上，设计了一种用于岩爆灾害防治的钢管混凝土框架与空心钢管组合吸能支护系统，并通过数值模拟和现场试验验证了该系统的有效性。加载试验结果表明，在储能加载下试件的破坏模式由静态破坏转变为动态破裂。在能量供应充足的情况下，岩爆的发生是不可避免的，但通过加强约束、提高吸能能力，将岩爆转化为大变形，可以减少或消除灾害。提出了以空心钢管为吸能部分和钢管混凝土框架为强约束部分的组合结构，以控制隧道支护中的岩爆灾害。对强岩爆冲击下支座动力响应的数值分析表明，空心钢管有效地降低了对钢管混凝土框架的冲击力，从而降低了整个支护系统的变形。假设空心钢管在变形过程中能够吸收所有的冲击能量，空心钢管强度越小，冲击力和位移越小。组合吸能支护为间隙要求严格的隧道岩爆灾害管理提供了有效的解决方案。