恒阻大变形锚杆拉伸力学性能及其应用研究  

TENSILE PROPERTIES AND APPLICATION OF CONSTANT RESISTANCE AND LARGE DEFORMATION BOLTS

作　　者：孙晓明[1,2] 王冬[1,2] 王聪[1,2] 刘鑫[1,2] 张飚[1,2] 刘宗权[1,2] 

机构地区：[1]中国矿业大学深部岩土力学与地下工程国家重点实验室,北京100083 [2]中国矿业大学力学与建筑工程学院,北京100083

出　　处：《岩石力学与工程学报》2014年第9期1765-1771,共7页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金重点项目(51134005);国家自然科学基金面上项目(51374214);中央高校基本科研业务费专项资金资助项目(2009QL03)

摘　　要：为了进一步研究恒阻大变形锚杆的拉伸力学性能,采用室内拉伸试验和现场实践相结合的方法,通过恒阻大变形锚杆(索)静力拉伸试验系统对恒阻大变形锚杆进行拉伸试验,从支护能力、锚杆伸长量、直径变形量和吸收能量4个方面对试验数据进行对比分析,并对其进行工程应用。试验与应用结果表明,恒阻大变形锚杆能够在顺应围岩大变形过程中,通过对围岩提供恒定的支护阻力,实现岩体内部变形能量的有控制性释放,从而达到支护体–围岩共同作用的巷道稳定性控制目标。恒阻大变形锚杆独有的恒定较高支护阻力、大拉伸量、锚杆变粗、吸收能量能力强的特点为易发生大变形破坏的软岩及深部巷道工程稳定性控制提供了有效途径。Indoor tensile experiment and field application were carried out in order to study the tensile properties of constant resistance and large deformation（CRLD） bolts. The static tensile experiment system of CRLD developed by Professor He Manchao was used. The experimental data of the support capacity,the bolt elongation, the radial deformation and energy absorption were analyzed. The results of the experiments and the application show that the CRLD bolt provides constant resistance in the course of large deformation of surrounding rock, achieves the controllable release of deformation energy of the rock,and attains the stability of roadway through the combined action of supporting body and surrounding rock. The salient properties of CRLD bolts of providing high and constant support resistance,capable of large deformation,expanding radial and having good ability of absorbing energy makes it an effective measure of safety control in the engineering practice of soft rock and deep roadway.

关 键 词：采矿工程 恒阻大变形锚杆 拉伸试验 深部软岩巷道 

分 类 号：TD353[矿业工程—矿井建设]