{"title":"Comprehensive evaluation of fault-controlled open-pit mine stability classification analysis and numerical simulation","authors":"Kuiming Liu, Zhigang Tao, Xin Li, Jianbin Yin","doi":"10.1007/s10064-024-03978-2","DOIUrl":null,"url":null,"abstract":"<div><p>The research on slope stability of open-pit mine has always been a key technical problem that plagues safe production, and it is also an important research topic in geotechnical engineering. Changshanhao open-pit mine is the largest gold mine in northern China. The increasing mining depth has led to various slope instability problems. Based on the background of ' 2021·10 landslide ' in the northeast stope, this paper carries out a new round of slope stability evaluation and disaster prevention countermeasures from the strategic height of the future development of the mining area. Firstly, the site engineering geological survey is carried out by using scanline method, and the main structural characteristics such as faults are summarized, and the comprehensive zoning map of engineering geology is established to reveal the failure mode of the slope in northeast stope are planar sliding and wedge sliding. Secondly, based on the principle of slope classification analysis, the study area is divided into overall slope, combined step slope and step slope, and the structural plane is matched with it. The stability of mining slope is preliminarily evaluated by stereographic projection method and Q-slope method. Approximately 13.9% of the area was classified as high-risk. Finally, the three-dimensional calculation model of the stope is established, and the FLAC3D is used to invert the landslide to reveal the influence mechanism of the fault on the slope stability. Combined with the analytical solution and the numerical solution, a suggestion is made to optimize the slope angle by raising the boundary., which lays a foundation for the sustainable and safe mining of the mine.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"83 11","pages":""},"PeriodicalIF":3.7000,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bulletin of Engineering Geology and the Environment","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s10064-024-03978-2","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, ENVIRONMENTAL","Score":null,"Total":0}
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Abstract
The research on slope stability of open-pit mine has always been a key technical problem that plagues safe production, and it is also an important research topic in geotechnical engineering. Changshanhao open-pit mine is the largest gold mine in northern China. The increasing mining depth has led to various slope instability problems. Based on the background of ' 2021·10 landslide ' in the northeast stope, this paper carries out a new round of slope stability evaluation and disaster prevention countermeasures from the strategic height of the future development of the mining area. Firstly, the site engineering geological survey is carried out by using scanline method, and the main structural characteristics such as faults are summarized, and the comprehensive zoning map of engineering geology is established to reveal the failure mode of the slope in northeast stope are planar sliding and wedge sliding. Secondly, based on the principle of slope classification analysis, the study area is divided into overall slope, combined step slope and step slope, and the structural plane is matched with it. The stability of mining slope is preliminarily evaluated by stereographic projection method and Q-slope method. Approximately 13.9% of the area was classified as high-risk. Finally, the three-dimensional calculation model of the stope is established, and the FLAC3D is used to invert the landslide to reveal the influence mechanism of the fault on the slope stability. Combined with the analytical solution and the numerical solution, a suggestion is made to optimize the slope angle by raising the boundary., which lays a foundation for the sustainable and safe mining of the mine.
期刊介绍：
Engineering geology is defined in the statutes of the IAEG as the science devoted to the investigation, study and solution of engineering and environmental problems which may arise as the result of the interaction between geology and the works or activities of man, as well as of the prediction of and development of measures for the prevention or remediation of geological hazards. Engineering geology embraces:
• the applications/implications of the geomorphology, structural geology, and hydrogeological conditions of geological formations;
• the characterisation of the mineralogical, physico-geomechanical, chemical and hydraulic properties of all earth materials involved in construction, resource recovery and environmental change;
• the assessment of the mechanical and hydrological behaviour of soil and rock masses;
• the prediction of changes to the above properties with time;
• the determination of the parameters to be considered in the stability analysis of engineering works and earth masses.
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