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针对硐室经常会受到各种动载作用问题.采用动态数值模拟软件,研究了锚固硐室在顶爆作用下的抗爆加固效果,并对加固机理进行了分析.通过对比拱顶同一位置的试验和数值模拟压应力时程曲线,说明数值模拟结果比较可靠.对比毛硐和锚固硐室的拱顶位移,发现经过锚杆加固硐室拱顶位移有明显的减少.通过对比毛硐和锚固硐室裂纹分布,得到毛硐的裂纹明显比锚固硐室分布广、宽,说明锚杆的抗爆效果比较好.根据锚杆锚头位置轴应力时程曲线,可以知道锚杆支护能够起到抗爆加固效果.
For the chamber is often subject to a variety of dynamic load effect.Using dynamic numerical simulation software to study the anti-blasting reinforcement effect of the anchor chamber under the top explosion effect, and the reinforcement mechanism is analyzed.Compared with the same position Experimental and numerical simulation of the compressive stress time-history curve shows that the numerical simulation results are more reliable.Comparing the vault displacement of the cave and the anchor chamber, it is found that the displacement of the arch chamber through the anchor rod is significantly reduced.Comparing the cave and the anchor The crack distribution in the chamber shows that the crack in the cave is obviously wider and wider than that in the anchor chamber, which shows that the antiknock effect of the anchor rod is better.According to the axial stress history curve of anchor bolt head, it can be known that the bolt support can play To the anti-blast reinforcement effect.