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采用抗爆模型试验方法,研究了在集中装药爆炸应力波的作用下,拱顶端部加密锚杆支护洞室抗爆效果。通过分析压力时程曲线,证明测试数据规律性合理,数据可靠。分析和比较了拱顶端部加密锚杆支护洞室与不加密锚杆支护洞室所造成的洞室围岩拱顶位移、洞壁应变、顶底板加速度和洞室宏观破坏形态,得出拱顶端部加密锚杆支护洞室抗爆加固效果不佳。
The antiknock model test method is used to study the antiknock effect of tunnel supported by encrypted bolt at the arch end under the action of concentrated loading explosion stress wave. By analyzing the pressure history curve, the test data is proved to be regular and data reliable. The displacement of surrounding rock cavern, the strain of wall, the acceleration of roof and floor and the macro-failure mode of cavern are analyzed and compared with those of the cavern supporting tunnel at the end of arch crown and the supporting tunnel without bolting Arch crest bolt support tunnel explosion-proof reinforcement effect is not good.