Theoretical and experimental research on the vibration characteristics excited at the end of pre-stressed rock-bolt

被引：0

作者：

Li, Qingfeng ^{[1
]}

Zhu, Chuanqu ^{[1
]}

机构：

[1] Hunan Key Laboratory of Coal Mining Safety Technology, School of Mining and Safety Engineering, Hunan University of Science and Technology, Xiangtan, 411201, Hunan

来源：

Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering | 2015年 / 32卷 / 05期

关键词：

Bolting support; Cantilever beam; Non-destructive dynamic testing; Pre-stress;

D O I：

10.13545/j.cnki.jmse.2015.05.008

中图分类号：

学科分类号：

摘要：

In order to improve the random and non-destructive dynamic detection accuracy of pre-stress of rock-bolt, according to pre-stressed rock-bolt mechanical characteristics loaded on the surrounding rock, the mechanical model of non-destructive dynamic detection of pre-stress of rock-bolt has been firstly put forward. Secondly, based on elastic dynamics and structural dynamics, the theoretical analysis of vibration mechanical model of pre-stressed rock-bolt has been presented when it is stimulated at its outer end, and the pre-stress formula of pre-stressed rock-bolt has been obtained. Finally, with the simulation of surrounding rock with concrete block, and anchored resin rock-bolt in the reserved hole of concrete block, the non-prestressed and prestressed rock-bolt have been detected by non-destructive dynamic detection instrument. The result has shown that the cantilever dynamics model is consistent with vibration mechanics characteristics of pre-stressed rock-bolt when stimulated at its outer end, and that test error basically meets the requirement of the field. ©, YYYY, China University of Mining and Technology. All right reserved.

引用

页码：748 / 752

页数：4

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