Deformation failure analysis and identification method of zoning type of actual tunnel surrounding rock

IF 1.1 Q3 ENGINEERING, CIVIL

Archives of Civil Engineering Pub Date : 2023-12-21 DOI:10.24425/ace.2023.147676

Wei Jing, Yunlong Gao, Rencai Jin, Laiwang Jing

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Abstract

: The research on deformation zoning mechanism of tunnel surrounding rock is of great signiﬁcance for ensuring safe production and disaster prevention in coal mines. However, the traditional deformation zoning theory of tunnel surrounding rock uses the ideal strain softening model as the criterion for judging the zoning type of all tunnel surrounding rock, ignoring the diﬀerence between the deformation zoning type of a speciﬁc actual tunnel and the basic zoning type of surrounding rock. In order to study the method for determining the actual deformation zoning type of tunnel surrounding rock, the formation mechanism of the actual deformation zoning of tunnel surrounding rock has been revealed.Combinedwithengineeringexamples,amethodfordeterminingtheactualdeformationzoning type and boundary stress of speciﬁc tunnel surrounding rock has been proposed. The results show that the boundary stress and position of the actual deformation zone are determined by the peak strength ﬁtting line, residual strength ﬁtting line, support strength line, and the position of the circumferential and radial stress relationship lines of each deformation zone. The actual boundary stress of each zone of tunnel surrounding rock is ultimately only related to the basic mechanical properties of the tunnel surrounding rock and the in-situ stress ﬁeld. The research results can provide reference for disaster management of underground engineering

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实际隧道围岩分区类型的变形破坏分析与识别方法

:隧道围岩变形分区机理的研究，对保障煤矿安全生产和防灾减灾具有重要意义。然而，传统的隧道围岩变形分区理论以理想应变软化模型作为判断所有隧道围岩分区类型的标准，忽视了具体实际隧道围岩变形分区类型与围岩基本分区类型之间的差异。为了研究隧道围岩实际变形分带类型的确定方法，揭示隧道围岩实际变形分带的形成机理，结合工程实例，提出了确定特定隧道围岩实际变形分带类型和边界应力的方法。结果表明，实际变形分区的边界应力和位置由各变形分区的峰值强度分区线、残余强度分区线、支护强度分区线以及圆周应力关系线和径向应力关系线的位置决定。隧道围岩各变形带的实际边界应力最终只与隧道围岩的基本力学性能和原位应力场有关。研究成果可为地下工程灾害治理提供参考

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来源期刊

Archives of Civil Engineering ENGINEERING, CIVIL-

CiteScore

1.50

自引率

28.60%

发文量

审稿时长

24 weeks

期刊介绍： ARCHIVES OF CIVIL ENGINEERING publish original papers of the theoretical, experimental, numerical and practical nature in the fields of structural mechanics, soil mechanics and foundations engineering, concrete, metal, timber and composite polymer structures, hydrotechnical structures, roads, railways and bridges, building services, building physics, management in construction, production of construction materials, construction of civil engineering structures, education of civil engineers.