锚固硐室在顶爆作用下加固效果及机理数值模拟  

Numerical simulation of anchored effects and anchored mechanism of tunnels reinforced by bolts under top explosion

作　　者：王光勇[1,2,3] 倪红梅[4] 周建伟[1,2] 

机构地区：[1]河南理工大学深部矿井建设重点学科开放实验室,河南焦作454000 [2]河南理工大学土木工程学院,河南焦作454000 [3]中国科学技术大学近代力学系,安徽合肥230026 [4]河南城建学院土木与材料工程系,河南平顶山467044

出　　处：《辽宁工程技术大学学报（自然科学版）》2013年第9期1187-1190,共4页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然基金资助项目(41072225);河南省教育厅自然科学基金资助项目(2011A580003);河南理工大学博士基金资助项目(B2010-58);深部矿井建设省级重点实验室开放基金资助项目(2011KF-05);深部矿井建设省级重点实验室开放基金资助项目(2012KF-02)

摘　　要：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.According to tunnels under all kinds of dynamic loads,the anti-explosion effects and anchored mechanism of tunnels reinforced by bolts were studied by using numerical analysis.Comparing with compression-stress curve of the experiments and numerical simulation on the same location of the vault,the simulation results are relatively reliable.By contrast the vault displacement of anchored tunnel and unlined tunnel,the vault displacement of the tunnel is significantly reduced through the reinforcement with anchor bolts.By comparing the crack distribution of the anchor tunnel and unlined tunnel,the cracks of unlined tunnel are significantly thicker and wider than that of the anchored tunnel,which indicates that the anti-explosion effects of anchor rods are better.The anchored bolts supporting can take effect of reinforcement and anti-explosion according to the time-histories curve of the anchor-head.

关 键 词：岩石力学 锚杆 硐室 顶爆 抗爆效果 加固机理 数值模拟 时程曲线 

分 类 号：TD264[矿业工程—矿井建设]