爆破振动对砂浆锚杆的影响研究  

Research on influence of blasting vibration on grouted rockbolt

作　　者：易长平[1] 卢文波[2] 

机构地区：[1]武汉理工大学资源与环境工程学院,武汉430070 [2]武汉大学水利水电学院,武汉430072

出　　处：《岩土力学》2006年第8期1312-1316,共5页Rock and Soil Mechanics

基　　金：国家自然科学基金重点项目(No.50239070);教育部科学技术重点项目(No.02133);湖北省自然科学基金项目(No.2002AB006)

摘　　要：爆破振动对锚杆有不利影响,运用应力波理论,并利用波函数展开法,研究了爆炸应力波与锚杆的相互作用过程,给出了爆破振动作用下砂浆锚杆周围砂浆体中的动应力和峰值振速分布情况,比较了不同频率应力波对锚杆的影响,导出了不同频率应力波作用下砂浆锚杆的安全质点振速范围。研究结果表明:入射波频率越高,砂浆锚杆所允许的安全质点峰值振速越大。Blasting vibration can induce some adverse influence on grouted rockbolt. The stress wave theory and wave function expansion method are adopted to analyze the interaction between stress wave and rockbolt. The distribution of stress and peak particle velocity around grout under the blasting vibration is derived; influences of stress wave in different frequencies on grouted rockbolt are compared; the safe peak particle velocity range in the grouted rockbolt is derived with stress waves of different frequencies. The result shows that the higher the frequency of incident wave is, the bigger the safe peak vibration velocity for grouted rockbolt is.

关 键 词：爆破振动 砂浆锚杆 质点峰值振动速度 频率 

分 类 号：O382[理学—流体力学]