Rockburst Hazard Control Using the Excavation Compensation Method(ECM):A Case Study in the Qinling Water Conveyance Tunnel

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外文摘要：Rockburst disasters occur frequently during deep underground excavation,yet traditional concepts and methods can hardly meet the requirements for support under high geo-stress conditions.Consequently,rockburst control remains challenging in the engineering field.In this study,the mecha-nism of excavation-induced rockburst was briefly described,and it was proposed to apply the excavation compensation method(ECM)to rockburst control.Moreover,a field test was carried out on the Qjnling Water Conveyance Tunnel.The following beneficial findings were obtained:Excavation leads to changes in the engineering stress state of surrounding rock and results in the generation of excess energy △E,which is the fundamental cause of rockburst.The ECM,which aims to offset the deep excavation effect and lower the risk of rockburst,is an active support strategy based on high pre-stress compensation.The new negative Poisson's ratio(NPR)bolt developed has the mechanical characteristics of high strength,high toughness,and impact resistance,serving as the material basis for the ECM.The field test results reveal that the ECM and the NPR bolt succeed in controlling rockburst disasters effectively.The research results are expected to provide guidance for rockburst support in deep underground projects such as Sichuan-Xizang Railway.

外文关键词：

RockburstExcavation compensation methodPre-stressed supportNegative Poisson's ratio boltTunnel boring machine

作者：

Jie Hu、Manchao He、Hongru Li、Zhigang Tao、Dongqiao Liu、Tai Cheng、Di Peng

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作者单位：

Department of Geotechnical Engineering,College of Civil Engineering,Tongji University,Shanghai,200092,China

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

Department of Geotechnical Engineering,College of Civil Engineering,Tongji University,Shanghai 200092,China

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

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基金：

National Natural Science Foundation of ChinaFoundation of State Key Laboratory for Geomechanics and Deep Underground EngineeringFoundation of Collaborative Innovation Center for Prevention and Control of Mountain Geological Hazards of Zhejiang Province

项目编号：

41941018SKLGDUEK 2217PCMGH-2022-03

出版年：

2024

DOI：

10.1016/j.eng.2023.11.013

工程(英文)

CSTPCDEI

ISSN：2095-8099

年,卷(期)：2024.34(3)