摘要
应用材料力学理论,阐明了锚杆支护时锚尾一定受到偏心载荷作用和顶板锚杆破断的机理.通过理论分析和实验,提出了一种防止锚尾破断的新型锚杆,以及锚杆结构形式和加工制造工艺.论述了杆体直径与锚尾螺纹直径的合理级配关系,比较了金属粗尾锚杆和普通锚杆在不同载荷作用下的挠度值.证明了新型粗尾锚杆可以解决顶板锚杆破断问题.
With material mechanics theory, expounded bolt tail subjected to no center load action and roof bolt broken mechanism while roadway was supported with bolts. By theoretical analysis and lab test, put forward a kind of new type bolts which may prevent bolt tails from being broken, bolt construction structure’s pattern, and bolt made technology. It was illustrated that the reasonable grading relationship between bolt body’s diameter and bolt tail’s screw diameter. At the same time, compared disturbed values of the thick tail metal bolt and common bolt under the load action. It is verified that roof bolt broken problem may be solved with new type’s thick tail bolt.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2005年第3期327-331,共5页
Journal of China Coal Society
基金
教育部跨世纪优秀人才培养计划项目(200248)
关键词
巷道锚杆
破断机理
合理结构
roadway bolt
broken mechanics
reasonable structure
