Development of multi-functional anchorage support dynamic-static coupling performance test system and its application  

作　　者：Qi Wang Shuo Xu Bei Jiang Chong Zhang Zhe Sun Jingxuan Liu Cailin Jiao 

机构地区：[1]State Key Laboratory for Tunnel Engineering,China University of Mining&Technology-Beijing,Beijing 100083,China [2]Research Center of Geotechnical and Structural Engineering,Shandong University,Jinan 250061,China

出　　处：《International Journal of Mining Science and Technology》2024年第3期339-349,共11页矿业科学技术学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.51927807,52074164,42277174,42077267 and 42177130);the Natural Science Foundation of Shandong Province,China(No.ZR2020JQ23);China University of Mining and Technology(Beijing)Top Innovative Talent Cultivation Fund for Doctoral Students(No.BBJ2023048)。

摘　　要：In underground engineering with complex conditions,the bolt(cable)anchorage support system is in an environment where static and dynamic stresses coexist,under the action of geological conditions such as high stresses and strong disturbances and construction conditions such as the application of high prestress.It is essential to study the support components performance under dynamic-static coupling conditions.Based on this,a multi-functional anchorage support dynamic-static coupling performance test system(MAC system)is developed,which can achieve 7 types of testing functions,including single component performance,anchored net performance,anchored rock performance and so on.The bolt and cable mechanical tests are conducted by MAC system under different prestress levels.The results showed that compared to the non-prestress condition,the impact resistance performance of prestressed bolts(cables)is significantly reduced.In the prestress range of 50–160 k N,the maximum reduction rate of impact energy resisted by different types of bolts is 53.9%–61.5%compared to non-prestress condition.In the prestress range of 150–300 k N,the impact energy resisted by high-strength cable is reduced by76.8%–84.6%compared to non-prestress condition.The MAC system achieves dynamic-static coupling performance test,which provide an effective means for the design of anchorage support system.

关 键 词：Anchorage support system Development of test system Dynamic-static coupling test Combined stress 

分 类 号：TD353.6[矿业工程—矿井建设]