锚固预紧力与预紧力矩相互关系的研究  

Relationship between pre-tightening force and tightening torque

作　　者：李志兵[1] 张农[1] 韩昌良[1] 钱德雨[1] 

机构地区：[1]中国矿业大学矿业工程学院煤炭资源与安全开采国家重点实验室,江苏徐州221116

出　　处：《中国矿业大学学报》2012年第2期189-193,共5页Journal of China University of Mining & Technology

基　　金：江苏省高校优势学科平台;国家自然科学基金青年科学基金项目(50904064);煤炭资源与安全开采国家重点实验室自主研究课题(SKLCRSM09X03);中国矿业大学青年科技基金项目(2011QNB02)

摘　　要：为了用预紧力矩表达预紧力,基于支护时锚固区围岩处于弹塑性状态的假设,建立力学模型,以托锚力和轴力为纽带,分析研究预紧力与预紧力矩之间的相互关系,得出预紧力与预紧力矩的对应数值关系及变化趋势,采用自制的"锚杆锚固传递及衰减规律试验台"开展实验研究得到了类似的结果,验证了预紧力与预紧力矩关系的数学表达式的准确性.综合研究表明:预紧力矩不大于300N.m时,预紧力与预紧力矩之间可以建立较为简便的数学表达式;在这一范围内,采用预紧力矩预测及量化预紧力,是一种较准确且易行的施工判断方式.An elastic-plastic model was used to study bolt supports in surrounding rocK. I ne re- lationship between pre-tightening force and tightening torque was predicted with the model. The combination of anchoring and axial forces was studied with the model and an equation rela- ting pre-tightening force to tightening torque was developed. Test equipment was constructed to validate the equation. The results from experimental tests show that for tightening torques less than 300 N ~ m the equation accurately predicted the relationship. This provides an easy way to judge the quality of construction.

关 键 词：预紧力 预紧力矩 托锚力 轴力 量化 

分 类 号：TD353[矿业工程—矿井建设]