Full Length Article Research on the effect of surface retaining elements on the dynamic load resistance of bolted rockOA
The failure of support systems in deep coal mine roadways is a critical issue that hinders the development of deep coal resources.As a critical support element,the surface retaining element(SRE)plays a more prominent role in deep conditions.A comprehensive investigation into the anti-impact mechanism of an SRE on bolted surrounding rock under a dynamic load is greatly needed.In this study,split Hopkinson pressure bar(SHPB)tests were conducted to investigate the strengthening effect of different SRE areas on the mechanical properties of bolted specimens under dynamic and static loading.Moreover,the reinforcement effect of the SRE on the surrounding rock under various dynamic loadings was examined by FLAC3D.The results indicate that increasing the SRE area enhances the overall mechanical properties of the bolted specimens under combined dynamic and static loading conditions.By constructing an engineering-scale roadway numerical model,the impact of the SRE area on the amount of roof subsidence increases with increasing dynamic loading.The research findings enrich the study of the bearing capacity of SREs on bolted surrounding rock and provide a theoretical basis for controlling the surrounding rock in deep dynamic load roadways.
Hao Feng;Lishuai Jiang;Qingjia Niu;Chunang Li;Atsushi Sainoki
State Key Laboratory of Mining Disaster Prevention and Control,Shandong University of Science and Technology,Qingdao,266590,China State Key Laboratory of Intelligent Deep Metal Mining and Equipment,Northeastern University,Shenyang,110004,ChinaState Key Laboratory of Mining Disaster Prevention and Control,Shandong University of Science and Technology,Qingdao,266590,ChinaState Key Laboratory of Mining Disaster Prevention and Control,Shandong University of Science and Technology,Qingdao,266590,ChinaState Key Laboratory of Mining Disaster Prevention and Control,Shandong University of Science and Technology,Qingdao,266590,ChinaFaculty of Advanced Science and Technology,Kumamoto University,Kumamoto,860-8555,Japan
矿业与冶金
Surface retaining elementDynamic loadingBolted rockDynamic mechanical properties
《Rock Mechanics Bulletin》 2026 (1)
P.112-127,16
supported by the Young Scientist Project of National Key Research and Development Program of China(2021YFC2900600)the National Natural Science Foundation of China(52074166)Shandong Province(ZR2021YQ38).
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