{"title":"基于能量守恒原理和数值模拟的新型挠性倾覆稳定性和机理评估方法","authors":"","doi":"10.1016/j.ijrmms.2024.105896","DOIUrl":null,"url":null,"abstract":"<div><div>The flexural toppling occurring in anti-dip layered slopes exhibits complex mechanical behaviours and poses a serious threat to human engineering practices. In this paper, a novel method for evaluating the stability of flexural toppling is proposed by combining analytical solution and numerical simulation. The anti-dip rock layers in the slope are regarded as inclined slabs, and the deflection equations of each rock slab are calculated when the slab at the basal plane is restrict and that at the top is free. Critical length of the rock slab is then determined with the energy conservation principle, and it can be employed to evaluate the stability of flexural toppling. Numerical simulations have been conducted to validate the present calculation method and explore the mechanisms of flexural toppling. The simulation results indicate that failure initially occurs at the slope toe due to strong stress concentration, subsequently triggering a domino effect with failures propagate to the upper rock slabs as a result of the loss of support from the lower ones. These simulation results also combined with the analytical solution enhance the calculation accuracy of the method. This innovative approach not only advances our understanding of flexural toppling mechanisms but also provides a method for practical stability assessments.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":null,"pages":null},"PeriodicalIF":7.0000,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A novel method for evaluating stability and mechanism of flexural toppling based on energy conservation principle and numerical simulation\",\"authors\":\"\",\"doi\":\"10.1016/j.ijrmms.2024.105896\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>The flexural toppling occurring in anti-dip layered slopes exhibits complex mechanical behaviours and poses a serious threat to human engineering practices. In this paper, a novel method for evaluating the stability of flexural toppling is proposed by combining analytical solution and numerical simulation. The anti-dip rock layers in the slope are regarded as inclined slabs, and the deflection equations of each rock slab are calculated when the slab at the basal plane is restrict and that at the top is free. Critical length of the rock slab is then determined with the energy conservation principle, and it can be employed to evaluate the stability of flexural toppling. Numerical simulations have been conducted to validate the present calculation method and explore the mechanisms of flexural toppling. The simulation results indicate that failure initially occurs at the slope toe due to strong stress concentration, subsequently triggering a domino effect with failures propagate to the upper rock slabs as a result of the loss of support from the lower ones. These simulation results also combined with the analytical solution enhance the calculation accuracy of the method. This innovative approach not only advances our understanding of flexural toppling mechanisms but also provides a method for practical stability assessments.</div></div>\",\"PeriodicalId\":54941,\"journal\":{\"name\":\"International Journal of Rock Mechanics and Mining Sciences\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":7.0000,\"publicationDate\":\"2024-09-21\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Journal of Rock Mechanics and Mining Sciences\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1365160924002612\",\"RegionNum\":1,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, GEOLOGICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Rock Mechanics and Mining Sciences","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1365160924002612","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, GEOLOGICAL","Score":null,"Total":0}
A novel method for evaluating stability and mechanism of flexural toppling based on energy conservation principle and numerical simulation
The flexural toppling occurring in anti-dip layered slopes exhibits complex mechanical behaviours and poses a serious threat to human engineering practices. In this paper, a novel method for evaluating the stability of flexural toppling is proposed by combining analytical solution and numerical simulation. The anti-dip rock layers in the slope are regarded as inclined slabs, and the deflection equations of each rock slab are calculated when the slab at the basal plane is restrict and that at the top is free. Critical length of the rock slab is then determined with the energy conservation principle, and it can be employed to evaluate the stability of flexural toppling. Numerical simulations have been conducted to validate the present calculation method and explore the mechanisms of flexural toppling. The simulation results indicate that failure initially occurs at the slope toe due to strong stress concentration, subsequently triggering a domino effect with failures propagate to the upper rock slabs as a result of the loss of support from the lower ones. These simulation results also combined with the analytical solution enhance the calculation accuracy of the method. This innovative approach not only advances our understanding of flexural toppling mechanisms but also provides a method for practical stability assessments.
期刊介绍:
The International Journal of Rock Mechanics and Mining Sciences focuses on original research, new developments, site measurements, and case studies within the fields of rock mechanics and rock engineering. Serving as an international platform, it showcases high-quality papers addressing rock mechanics and the application of its principles and techniques in mining and civil engineering projects situated on or within rock masses. These projects encompass a wide range, including slopes, open-pit mines, quarries, shafts, tunnels, caverns, underground mines, metro systems, dams, hydro-electric stations, geothermal energy, petroleum engineering, and radioactive waste disposal. The journal welcomes submissions on various topics, with particular interest in theoretical advancements, analytical and numerical methods, rock testing, site investigation, and case studies.