State of the art review of the large deformation rock bolts

作     者：Qiru Sui Manchao He Pengfei He Min Xia Zhigang Tao 

作者机构：State Key Laboratory for GeoMechanics and Deep Underground EngineeringChina University of Mining and Technology(Beijing)Beijing 100083China Institute for Deep Underground Science and EngineeringChina University of Mining and Technology(Beijing)Beijing 100083China School of Mechanics and Civil EngineeringChina University of Mining and Technology(Beijing)Beijing 100083China 

出 版 物：《Underground Space》 (地下空间（英文）)

年 卷 期：2022年第7卷第3期

页      面：465-482页

核心收录：

学科分类：081901[工学-采矿工程] 0819[工学-矿业工程] 08[工学] 

基　　金：financial supports from the Key Special Project of National Natural Science Foundation of China(No.41941018) Open Research Fund of Technology Innovation Center for Geological Environment Monitoring,China(No.2020KFK1212001) 

主　　题：Rock bolt Energy absorbing Constant resistance Large deformation 

摘      要：Rock bolting technique is an important reinforcement measure in the geotechnical engineering *** rock bolts have been continuously emerging through the development of rock supporting *** conditions,such as high crustal stress,extremely soft rock,and strong mining disturbance often occur in the deep mining,resulting in large deformation of the surrounding rock *** the deformation of traditional rock bolts is generally below 200 mm,failure often occurs to the rock bolts because of insufficient *** effectively control the large deformation of surrounding rock masses caused by complex conditions,it is necessary to develop large deformation rock bolts with high constant resistance,also called energy-absorbing *** paper systematically reviews the development of large deformation rock bolts and the structure,energy absorption mechanism,anchorage performance,and mechanical properties of several typical large deformation rock *** advantages and disadvantages of existing large deformation rock bolts are compared and the concept of constant resistance large deformation support is introduced.