锚杆锚固力无损检测的数值模拟  

Numerical Simulation of Nondestructive Testing of Anchoring Force

作　　者：樊智 苗晓伟 李青锋 谷洪飞 张建业 Fan Zhi;Miao Xiaowei;Li Qingfeng;Gu Hongfei;Zhang Jianye(Luning Coal Industry Co.,Ltd.,Xinzhou 036700,China;School of Resources,Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan 411201,China)

机构地区：[1]潞宁煤业有限责任公司,山西忻州036700 [2]湖南科技大学资源环境与安全工程学院,湖南湘潭411201

出　　处：《矿业工程研究》2020年第2期15-21,共7页Mineral Engineering Research

基　　金：湖南省自然科学基金面上资助项目(2018JJ2130)。

摘　　要：为了验证锚固力计算关系式的实用性,分别从时域和频域2个方面分析了应力波在锚固锚杆中传播特性,结合锚固力计算关系式得出锚固力,并进行不同工作荷载下锚杆拉出位移的数值模拟得出锚固力,最后通过对比两者得出的锚固力数值,得出如下结论:预应力可以增大首波过后的应力波峰值,当峰值过大时,会影响锚固起始位置的识别;随着工作荷载增大到一定程度,锚杆锚固质量开始受损,锚固力降低,必须精准控制锚杆预应力;无损检测锚杆锚固力具有实用意义.In order to verify the practicability of the computing relationship of the anchoring force,the propagation characteristics of the stress wave in the anchoring bolt is analyzed from the time domain and the frequency domain respectively.The anchoring force is obtained by combining the computing relationship of the anchoring force,and then different working loads are performed.The numerical simulation of the pull-out displacement of the lower anchor rod obtains the anchoring force.Finally,by comparing the anchoring force values obtained by the above two,it is concluded that the prestress can increase the peak value of the stress wave after the first wave.When the peak value is too large,it will affect the identification of the anchoring starting position.As the working load increases to a certain extent,the anchoring mass of the anchor begins to be damaged,the anchoring force decreases,and the prestressing force of the anchor must be accurately controlled.The non-destructive testing of the anchor’s anchoring force is of practical significance.

关 键 词：锚固力 应力波 数值模拟 无损检测 

分 类 号：TD353[矿业工程—矿井建设]