Dynamic mechanical characteristics and application of constant resistance energy-absorbing supporting material

作     者：Qi Wang Shuo Xu Manchao He Bei Jiang Huayong Wei Yue Wang Qi Wang;Shuo Xu;Manchao He;Bei Jiang;Huayong Wei;Yue Wang

作者机构：State Key Laboratory for Geo-mechanics and Deep Underground EngineeringChina University of Mining and Technology-BeijingBeijing 100083China Research Center of Geotechnical and Structural EngineeringShandong UniversityJinan 250061China 

出 版 物：《International Journal of Mining Science and Technology》 (矿业科学技术学报（英文版）)

年 卷 期：2022年第32卷第3期

页      面：447-458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] 0818[工学-地质资源与地质工程] 0837[工学-安全科学与工程] 0802[工学-机械工程] 

基　　金：This work was supported by the National Natural Science Foundation of China(Nos.41941018,52074164,and 42077267);the Natural Science Foundation of Shandong Province,China(Nos.2019SDZY04 and ZR2020JQ23) the Project of Shandong Province Higher Educational Youth Innovation Science and Technology Program,China(No.2019KJG013). 

主　　题：Constant resistance energy-absorbing Supporting material Dynamic impact tests Mechanical characteristics Field application 

摘      要：In deep underground engineering,rock burst and other dynamic disasters are prone to occur due to stress concentration and energy accumulation in surrounding rock.The control of dynamic disasters requires bolts and cables with high strength,high elongation,and high energy-absorbing capacity.Therefore,a constant resistance energy-absorbing(CREA)material is developed.In this study,the dynamic characteristics of the new material are obtained via the drop hammer tests and the Split Hopkinson Pressure Bar(SHPB)tests of the new material and two common bolt(CB)materials widely used in the field.The test results of drop hammer test and SHPB test show that the percentage elongation of CREA material is more than 2.64 and 3.22 times those of the CB material,and the total impact energy acting on CREA material is more than 18.50 and 21.84 times,respectively,indicating that the new material has high elongation and high energy-absorbing capacity.Subsequently,the CREA bolts and cables using the new material are developed,which are applied in roadways with high stress and strong dynamic disturbance.The field monitoring results show that CREA bolts and cables can effectively control the surrounding rock deformation and ensure engineering safety.