煤矿锚杆锚固结构系统横向振动特性研究  

Theoretical research on transverse vibrations of the bolt anchorage structure in coal mine

作　　者：薛道成[1] 张凯[1] 

机构地区：[1]中国矿业大学矿业工程学院深部岩土力学与地下工程国家重点实验室,江苏徐州221116

出　　处：《中国矿业大学学报》2013年第4期695-700,共6页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(51227003;51104151)

摘　　要：为了探寻锚杆轴向受力无损检测方法,基于结构振动理论,建立了锚杆锚固结构系统动力学模型,得到了锚杆横向振动频率的求解方程,进而根据围岩与托盘接触面的力学响应特征,推导了锚杆横向振动频率与其轴向受力的关系,结果表明:锚杆各阶横向振动频率均随着锚杆轴向受力的增大而提高,且其间的关系可以很好地用指数函数进行描述,围岩越"硬",相同轴力条件下锚杆横向固有频率越大.In order to explore the method of detecting the axial force of bolt,the dynamic response of bolt anchorage structure is studied here.A simplified dynamic model of the structure was set up and the equations to calculate the inherent frequency of transverse vibrations were deduced.Based on the mechanical response of contact surface between the surrounding rock and the anchor plate,the relation between the inherent frequencies and axial force of bolt was got.The influence of the condition of surrounding rock on the relation between the inherent frequencies and axial force was studied.The results show that the inherent frequencies increase with the increasing of the axial force,and an exponential function may be used to match the relation between the inherent frequencies and axial force.When the surrounding rock becomes harder,the inherent frequency is higher according to the same axial force.

关 键 词：锚杆锚固结构系统 横向振动频率 锚杆轴力检测 

分 类 号：O327[理学—一般力学与力学基础]