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

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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 character-istics 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 defor-mation and ensure engineering safety.

Constant resistance energy-absorbingSupporting materialDynamic impact testsMechanical characteristicsField application

Qi Wang、Shuo Xu、Manchao He、Bei Jiang、Huayong Wei、Yue Wang

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State Key Laboratory for Geo-mechanics and Deep Underground Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China

Research Center of Geotechnical and Structural Engineering,Shandong University,Jinan 250061,China

National Natural Science Foun-dation of ChinaNational Natural Science Foun-dation of ChinaNational Natural Science Foun-dation of ChinaNatural Science Foundation of Shandong ProvinceChinaNatural Science Foundation of Shandong ProvinceChinaProject of Shandong Province Higher Educational Youth Innovation Science and Technology Pro-gramChina

4194101852074164420772672019SDZY04ZR2020JQ232019KJG013

2022

矿业科学技术学报(英文版)
中国矿业大学

矿业科学技术学报(英文版)

CSTPCDCSCDSCIEI
影响因子：1.222
ISSN：2095-2686
年,卷(期)：2022.32(3)
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