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Bedding effect on progressive crack propagation in layered sandstone grotto roof

文献类型：期刊论文

作者Liu, Changqing4; Bao, Han4; Lan, Hengxing2,3; Li, Li1; Chen, Weichang1; Lv, Hongtao4; Liu, Jianhui1; Liu, Shijie3
刊名TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
出版日期2024-10-01
卷号152页码:12
关键词Sandstone grotto Layered roof Crack propagation Fracture mechanic Bedding effect
ISSN号0886-7798
DOI10.1016/j.tust.2024.105914
英文摘要Roof failure significantly threatens the safety and stability of grottoes. For the layered roof of sandstone grottoes, the failure process is closely related to bedding effects of crack propagation. Taking the Yuanjue Cave as an example, the progressive failure process of the layered roof was summarized. The mechanisms of crack propagation in the roof were analyzed theoretically, and bedding effects together with influencing factors of crack propagation were explored. Results showed that the instability process of the layered roof in sandstone grottoes can be summarized into four stages: tensile fracture of the roof, vertical expansion of cracks, horizontal deflection of cracks, and instability collapse of blocks. The development and propagation of cracks constituted the intrinsic cause of the instability of layered roofs. A fracture mechanics model for crack propagation in layered roofs was established considering the bedding effect, and the criteria for vertical expansion of cracks in grotto roofs was derived. Moreover, the fracture criterion of crack competition was modified in combination with the bedding effect, revealing that an increase in interlaminar cohesion inhibited the crack deflection mode. The crack deflection mode in grotto roofs was jointly determined by the stress at the crack-tip ( sigma fxx and sigma fyy ), the strength of the rock layers and bedding plane ( sigma' t , mu and c ). To control the crack propagation in roofs, the engineering reinforcement of grotto roofs can be achieved by weakening bedding effects and indirectly reducing the roof span. This study is of great significance for revealing the progressive failure process and optimizing the reinforcement scheme of layered roofs in grottoes.
WOS关键词PROTECTIVE MEASURES ; NATURAL FRACTURE ; MODE-I ; FAILURE ; ROCK ; CRITERION ; BEHAVIOR ; CAVERNS ; ROADWAY ; TUNNEL
资助项目National Natural Science Foundation of China[42177142] ; National Natural Science Foundation of China[41927806] ; National Key R & D Program of China[2019YFC1520601] ; Key Research and Development Program of Shaanxi[2023-YBSF-486] ; Fundamental Research Funds for the Central Universities ; CHD the Young Talent Fund[300102212213]
WOS研究方向Construction & Building Technology ; Engineering
语种英语
WOS记录号WOS:001260022600001
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构National Natural Science Foundation of China ; National Key R & D Program of China ; Key Research and Development Program of Shaanxi ; Fundamental Research Funds for the Central Universities ; CHD the Young Talent Fund
源URL[http://ir.igsnrr.ac.cn/handle/311030/207777]  
专题资源与环境信息系统国家重点实验室_外文论文
通讯作者Bao, Han; Lan, Hengxing
作者单位1.Chinese Acad Cultural Heritage, Beijing 100029, Peoples R China
2.Chinese Acad Sci, State Key Lab Resources & Environm Informat Syst, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
3.Changan Univ, Sch Geol Engn & Geomat, Middle sect Naner Huan Rd, Xian 710064, Shaanxi, Peoples R China
4.Changan Univ, Sch Highway, Xian 710064, Shaanxi, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Changqing,Bao, Han,Lan, Hengxing,et al. Bedding effect on progressive crack propagation in layered sandstone grotto roof[J]. TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY,2024,152:12.
APA Liu, Changqing.,Bao, Han.,Lan, Hengxing.,Li, Li.,Chen, Weichang.,...&Liu, Shijie.(2024).Bedding effect on progressive crack propagation in layered sandstone grotto roof.TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY,152,12.
MLA Liu, Changqing,et al."Bedding effect on progressive crack propagation in layered sandstone grotto roof".TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY 152(2024):12.

入库方式： OAI收割

来源：地理科学与资源研究所

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