摘要
对比分析了快慢凝预应力锚杆较普通全长树脂锚杆的优势,从锚杆的轴向作用和横向作用两方面进行力学特性研究,得到快慢凝预应力树脂锚杆轴向和横向的应力分布规律.锚杆的轴向作用有效地改善了围岩的应力状态.锚杆的横向作用体现在两个方面,即充填裂隙和抗滑移剪切,能有效改善围岩的力学性质.最后,探讨了节理岩体中锚杆的受力特征,锚杆存在多个应力峰值点,并对轴力公式进行了修正.
A comparative analysis was done to reveal the advantage of a tensioned fast-slow set full-column bolt over a common full-column resin bolt.The interactional mechanics characteristics between a tensioned fast-slow set full-column bolt and rock mass were studied to find out the stress distribution of the bolt both in the axial and lateral directions.It is shown that the stress state of wall rock is effectively improved due to the axial action of the bolt.But the lateral action of the bolt includes filling the rock crevices and restraining the shear sliding,which effectively improve the mechanical properties of wall rock.Finally,the mechanics characteristics of the bolt in the jointed rock were discussed.The result indicates that there exist several axial stress peaks.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2012年第4期363-367,共5页
Journal of University of Science and Technology Beijing
基金
长江学者和创新团队发展计划资助项目(IRT0950)
关键词
地下采矿
锚杆支护
围岩
应力分析
underground mining
rock bolting
wall rock
stress analysis
作者简介
通信作者:李莉,E-mail:skylily616@163.com
