岩土力学2025，Vol.46Issue(6)：1765-1776,12.DOI:10.16285/j.rsm.2024.1104
结构面影响深埋隧道硬质围岩岩爆特征试验研究
Experimental investigation on influence of structural plane on rockburst characteristics of hard surrounding rock in a deep-buried tunnel
摘要
Abstract
This study examines the evolution of rockburst in hard surrounding rock of a deep-buried tunnel affected by structural planes.True triaxial rockburst model tests were conducted on cubic sandstone specimens with a circular tunnel,with and without structural surfaces.An acoustic emission system was used in the experiment to monitor the evolution process of rockburst.Results show that the structural planes significantly affect the position and intensity of rockburst,as well as the failure mode of cavern wall.The damaged zone is symmetrical on both sides of specimens without a structural plane.Several rock flakes form a shallow V-shaped notch in the sidewall of the circular tunnel.The failure position on both sides of specimen with a structural plane is asymmetrical.On the side distant from the structural plane,a large number of rock flakes peel off,forming a deep V-shaped notch.Near the structural plane,multiple cracks form,causing the rock mass between the tunnel and the structural face to tend to collapse into the tunnel space.The acoustic emission(AE)events in specimen with structural plane are much more active,with the average energy of a single impact being approximately 2.2 times that of the specimen without a structural pane.According to the evolution of cumulative impact count,the loading process before rockburst can be divided into three stages,including crack closure and linear elastic deformation,crack initiation and stable propagation,and crack unstable development.The crack initiation and stable propagation is earlier in specimen with a structural plane than that in specimen without a structural plane.All cracks generated during the failure process are tension-shear mixed pattern in both tested specimens.The proportion of shear cracks is larger in specimen with a structural plane compared to that without.The presence of structural plane changes the position of initial damage in specimen.The AE location in the experiment generally correspond to the failure pattern of circular tunnel.关键词
结构型岩爆/隧道/V型凹槽/真三轴加载/声发射Key words
structure-type rockburst/circular tunnel/V-shaped notch/true triaxial loading/acoustic emission(AE)分类
土木建筑引用本文复制引用
韩世迎,王航龙,彭俊,朱君星,王林飞,潘堃..结构面影响深埋隧道硬质围岩岩爆特征试验研究[J].岩土力学,2025,46(6):1765-1776,12.基金项目
国家重点研发计划(No.2023YFC2907201) （No.2023YFC2907201）
国家重点研发计划青年科学家项目(No.2022YFC2905700) （No.2022YFC2905700）
国家自然科学基金重点项目(No.52130403) （No.52130403）
安徽省自然科学基金(No.2208085ME120) （No.2208085ME120）
安徽省重点研发计划(No.2022m07020001).This work was supported by the National Key Research and Development Program of China(2023YFC2907201),the National Key Research and Development Program for Young Scientists of China(2022YFC2905700),the Key Project of National Natural Science Foundation of China(52130403),the Natural Science Foundation of Anhui Province(2208085ME120)and the Key Research and Development Plan of Anhui Province(2022m07020001). （No.2022m07020001）
