深井巷道锚杆锚固系统动静组合受力特性

项目名称： 深井巷道锚杆锚固系统动静组合受力特性

项目编号： No.51304067

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 矿业工程

项目作者： 常旭

作者单位： 河南理工大学

项目金额： 25万元

中文摘要： 锚杆是深部巷道支护中广泛采用的一个基本受力构件。冲击地压和放炮等产生的动力扰动会诱发深部巷道支护结构的损伤破坏，其实质是在围岩静力作用的基础上，由附加的动力效应所引起，是动静组合荷载作用的结果。因此，锚杆锚固系统的动静组合受力特性是关于深部巷道稳定性的重要科学问题。本项目研究动静组合荷载作用下深部巷道锚杆锚固系统的破坏过程及破坏模式，界面粘结应力的分布及时程演变规律，粘结-滑移特征及其围岩应力状态、初始静载水平和动载频率等参数的影响；深入揭示动静组合荷载作用下深部巷道锚杆锚固系统的破坏机理；建立其粘结-滑移力学模型；在试验和理论分析的基础上，对深部巷道锚杆锚固系统在动静组合荷载作用下的力学特性展开数值模拟，并展开现场试验。本项目的研究为深部巷道的稳定技术提供理论依据，为其支护设计提供参考。

中文关键词： 深部开采；动静组合荷载；力学特性；锚固体；拉拔

英文摘要： The rock bolt is the basic member in all sorts of supports for the deep drifts. Dynamic disturbances induced by rock burst and blasting, etc., will bring damages to the supports of the deep drifts. Such dynamic damages are essentially caused by these dynamic responses associated with the rock pressure. Therefore, these damages are the results of dynamic-static coupling loading. And thus, the mechanical characteristic of the rock bolt anchoring system under dynamic-static coupling loading is a fundamental problem for the stability control of the deep drift. The main contents of the study include: the failure process and failure modes of the rock bolt anchoring system under dynamic-static coupling loading, bond stress distribution in spatial and temporal expression, bond-slip behaviors and the influences of initial stress state of surrounding rock, initial static load level and load frequency, etc. on them. The failure mechanism will be explored and bond-slip model will be developed. Based on the test results and theoretical analyses, numerical simulation on mechanical characteristics of rock bolt anchoring system under dynamic-static coupling loading will be conducted and also the field tests will be carried out. This research will supply the theory gist for the stability control of the deep drift and provide ref

英文关键词： Deep mining；动静组合荷载；力学特性；锚固体；拉拔