锚杆锚固系统在瞬态激励下的动态响应特性  

Dynamic response for grouted system of rock bolts under instantaneous excitation

作　　者：王成[1] 宁建国[1] 李朋[1] 

机构地区：[1]北京理工大学爆炸科学与技术国家重点实验室,北京100081

出　　处：《煤炭学报》2008年第1期7-10,共4页Journal of China Coal Society

基　　金：国家自然科学基金资助项目(10572026)

摘　　要：在考虑内外黏性阻力和底端岩层刚度的条件下,建立了端锚锚杆的纵向振动理论模型,求解得到了不同边界条件下端锚锚杆在瞬态敲击下的加速度动态响应,并基于该理论模型对影响锚杆锚固质量的参数进行了分析.最后将理论和数值模拟结果与实验进行对比,三者吻合较好,从而验证了理论模型和数值计算结果能较准确地反映锚固锚杆的振动特性和弹性波的传播规律.Considering viscous resistance and the stiffness of rock layer for bottom, the longitudinal vibration theoretical model for the grouted rock bolts was established, and the acceleration responses for free rock bolts and grouted rock bolts under different boundary conditions were obtained. Based on the theoretical model, analyzed the parameters that have the influence on the bonding quality of rock bolts. The theoretical results were compared with numerical results and experiments, which indicated a satisfactory coincidence among the three. As a result, the theoretical model and numerical results can accurately reflect the vibration characteristics of grouted rock bolts and the propagation laws of elastic wave.

关 键 词：锚杆 锚固质量 上界面反射 底端反射 无损检测 

分 类 号：TD353.6[矿业工程—矿井建设]