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为了给抗爆洞室的锚杆支护设计提供参考,利用数值分析软件LS-DYNA3D程序,研究了在侧爆作用下的锚固洞室的抗爆加固效果。结果表明:毛洞和锚固洞室裂纹分布比较相似,由于反射拉伸在侧墙附近形成了两个裂纹区;在侧墙附近形成的第一个裂纹区,毛洞形成的裂纹区比锚固洞室广、粗,而在第二裂纹区,锚固洞室的裂纹区比毛洞稍广、细;经过锚杆加固的洞室峰值位移减少1.1 mm,减小24.4%,说明锚固洞室具有较好的抗爆加固效果。
In order to provide reference for the bolt support design of anti-explosion caverns, the anti-knocking reinforcement effect of the anchor tunnel under the lateral explosion was studied by using the numerical analysis software LS-DYNA3D. The results show that the distribution of cracks is similar between the caverns and the anchor tunnels. Two crack zones are formed near the sidewalls due to the reflection and stretching; the first crack zone formed near the sidewalls is the crack zone formed by the caverns compared with the anchoring holes. The chamber is wide and thick, while in the second crack zone, the crack zone of the anchor cavity is slightly wider and finer than the cavern; the peak displacement of the cavern reinforced with the anchor rod is reduced by 1.1 mm, which is reduced by 24.4%, indicating that the anchor cavern has a comparatively Good anti-knock reinforcement effect.