{"title":"天然裂缝发育程度对大理石力学性能的影响","authors":"Yong Han, Yue-Mao Zhao","doi":"10.1007/s10064-023-03319-9","DOIUrl":null,"url":null,"abstract":"<div><p>The stability of deep-buried hard rock roadways requires urgent improvement when the surrounding rock contains numerous cracks. In this study, a quantitative method using two parameters, the preferential angle (<i>θ</i><sub><i>p</i></sub>) and degree of crack development coefficient (<i>K</i>), was developed to measure the degree of natural cracks development in rock specimens. True triaxial compression tests were performed on intact marble and marble containing natural cracks to investigate the effect of the degree of development of natural cracks on the strength and failure modes. Compared with the results for the intact specimens, the peak strength and crack damage stress of the marble containing a single natural crack decreased nonlinearly and then increased with an increase in the preferential angle. The results for marble containing multiple cracks exhibited a similar pattern. The peak strength and crack damage decreased logarithmically with an increase in the degree of the crack development coefficient. There were four main failure modes in the specimens containing cracks: shear failure caused by compression, natural crack shear, tensile failure, and tension–shear mixing. With an increase in <i>K</i>, the impact of the cracks on the macroscopic failure of the rock increased. As for the specimens containing multiple cracks, there were multiple failure modes in the same specimen, including shear failure, crack shear or tensile failure, and the intersection of natural cracks and newly generated macroscopic cracks.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"82 8","pages":""},"PeriodicalIF":3.7000,"publicationDate":"2023-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10064-023-03319-9.pdf","citationCount":"0","resultStr":"{\"title\":\"Effect of the degree of natural cracks development on the mechanical properties of marble\",\"authors\":\"Yong Han, Yue-Mao Zhao\",\"doi\":\"10.1007/s10064-023-03319-9\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The stability of deep-buried hard rock roadways requires urgent improvement when the surrounding rock contains numerous cracks. In this study, a quantitative method using two parameters, the preferential angle (<i>θ</i><sub><i>p</i></sub>) and degree of crack development coefficient (<i>K</i>), was developed to measure the degree of natural cracks development in rock specimens. True triaxial compression tests were performed on intact marble and marble containing natural cracks to investigate the effect of the degree of development of natural cracks on the strength and failure modes. Compared with the results for the intact specimens, the peak strength and crack damage stress of the marble containing a single natural crack decreased nonlinearly and then increased with an increase in the preferential angle. The results for marble containing multiple cracks exhibited a similar pattern. The peak strength and crack damage decreased logarithmically with an increase in the degree of the crack development coefficient. There were four main failure modes in the specimens containing cracks: shear failure caused by compression, natural crack shear, tensile failure, and tension–shear mixing. With an increase in <i>K</i>, the impact of the cracks on the macroscopic failure of the rock increased. As for the specimens containing multiple cracks, there were multiple failure modes in the same specimen, including shear failure, crack shear or tensile failure, and the intersection of natural cracks and newly generated macroscopic cracks.</p></div>\",\"PeriodicalId\":500,\"journal\":{\"name\":\"Bulletin of Engineering Geology and the Environment\",\"volume\":\"82 8\",\"pages\":\"\"},\"PeriodicalIF\":3.7000,\"publicationDate\":\"2023-07-10\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://link.springer.com/content/pdf/10.1007/s10064-023-03319-9.pdf\",\"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/s10064-023-03319-9\",\"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}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bulletin of Engineering Geology and the Environment","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s10064-023-03319-9","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}
Effect of the degree of natural cracks development on the mechanical properties of marble
The stability of deep-buried hard rock roadways requires urgent improvement when the surrounding rock contains numerous cracks. In this study, a quantitative method using two parameters, the preferential angle (θp) and degree of crack development coefficient (K), was developed to measure the degree of natural cracks development in rock specimens. True triaxial compression tests were performed on intact marble and marble containing natural cracks to investigate the effect of the degree of development of natural cracks on the strength and failure modes. Compared with the results for the intact specimens, the peak strength and crack damage stress of the marble containing a single natural crack decreased nonlinearly and then increased with an increase in the preferential angle. The results for marble containing multiple cracks exhibited a similar pattern. The peak strength and crack damage decreased logarithmically with an increase in the degree of the crack development coefficient. There were four main failure modes in the specimens containing cracks: shear failure caused by compression, natural crack shear, tensile failure, and tension–shear mixing. With an increase in K, the impact of the cracks on the macroscopic failure of the rock increased. As for the specimens containing multiple cracks, there were multiple failure modes in the same specimen, including shear failure, crack shear or tensile failure, and the intersection of natural cracks and newly generated macroscopic cracks.
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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