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Mobilized Mohr-Coulomb and Hoek-Brown Strength Parameters during Failure of Granite in Alxa Area in China for High-Level Radioactive Waste Disposal
Cheng, Cheng1; Xu, Nengxiong1; Zheng, Bo2
2019-11-02
Source PublicationENERGIES
Volume12Issue:22Pages:16
AbstractStrength parameters of the host rock is of paramount importance for modelling the behaviors of underground disposal repository of high-level radioactive waste (HLW). Mobilization of strength parameters should be studied for a better understanding and modelling on the mechanical behaviors of the surrounding rock, considering the effect of temperature induced by the nuclear waste. The granite samples cored from NRG01 borehole in Alxa candidate area in China for HLW disposal are treated by different temperatures (T = 20 degrees C, 100 degrees C and 200 degrees C), and then are used to carry out a series of uniaxial and tri-axial compression experiments under various confining pressures (sigma(3) = 0, 5, 10, 20, and 30 MPa) in this study. With the recorded axial stress-axial strain and axial stress-lateral strain curves, mobilization of both Mohr-Coulomb and Hoek-Brown strength parameters are analyzed with the increasing plastic shear strain. It has been found that NRG01 granite samples show generally similar cohesion weakening and friction strengthening behaviors, as well as the non-simultaneous mobilization of Hoek-Brown strength parameters (mb and s), under the effect of various treatment temperatures. Furthermore, the samples treated by higher temperatures show lower initial values of cohesion, but their initial friction angle and mb values are relatively higher. This should be mainly owing to the thermally induced cracks in the samples. This study should be helpful for a better modelling on the mechanical behaviors of NRG01 granite samples as the host rock of a possible HLW disposal repository.
Keywordgranite HLW disposal plastic strain temperature CWFS damage process yield condition strength criterion
DOI10.3390/en12224237
Funding OrganizationFundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; High-Level Radioactive Waste Disposal Project of the State Administration for Science, Technology and Industry for National Defense, China - National Natural Science Foundation of China ; High-Level Radioactive Waste Disposal Project of the State Administration for Science, Technology and Industry for National Defense, China - National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; High-Level Radioactive Waste Disposal Project of the State Administration for Science, Technology and Industry for National Defense, China - National Natural Science Foundation of China ; High-Level Radioactive Waste Disposal Project of the State Administration for Science, Technology and Industry for National Defense, China - National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; High-Level Radioactive Waste Disposal Project of the State Administration for Science, Technology and Industry for National Defense, China - National Natural Science Foundation of China ; High-Level Radioactive Waste Disposal Project of the State Administration for Science, Technology and Industry for National Defense, China - National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; High-Level Radioactive Waste Disposal Project of the State Administration for Science, Technology and Industry for National Defense, China - National Natural Science Foundation of China ; High-Level Radioactive Waste Disposal Project of the State Administration for Science, Technology and Industry for National Defense, China - National Natural Science Foundation of China
WOS KeywordSITU STRESS MEASUREMENTS ; DECOVALEX-III PROJECT ; NEAR-FIELD SAFETY ; BRITTLE FAILURE ; THERMAL-CONDUCTIVITY ; GEOLOGICAL DISPOSAL ; MODEL ; DEGRADATION ; REPOSITORY ; SELECTION
Language英语
Funding ProjectFundamental Research Funds for the Central Universities[2-9-2018-087] ; National Natural Science Foundation of China[41772326] ; High-Level Radioactive Waste Disposal Project of the State Administration for Science, Technology and Industry for National Defense, China - National Natural Science Foundation of China[41772326]
Funding OrganizationFundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; High-Level Radioactive Waste Disposal Project of the State Administration for Science, Technology and Industry for National Defense, China - National Natural Science Foundation of China ; High-Level Radioactive Waste Disposal Project of the State Administration for Science, Technology and Industry for National Defense, China - National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; High-Level Radioactive Waste Disposal Project of the State Administration for Science, Technology and Industry for National Defense, China - National Natural Science Foundation of China ; High-Level Radioactive Waste Disposal Project of the State Administration for Science, Technology and Industry for National Defense, China - National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; High-Level Radioactive Waste Disposal Project of the State Administration for Science, Technology and Industry for National Defense, China - National Natural Science Foundation of China ; High-Level Radioactive Waste Disposal Project of the State Administration for Science, Technology and Industry for National Defense, China - National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; High-Level Radioactive Waste Disposal Project of the State Administration for Science, Technology and Industry for National Defense, China - National Natural Science Foundation of China ; High-Level Radioactive Waste Disposal Project of the State Administration for Science, Technology and Industry for National Defense, China - National Natural Science Foundation of China
WOS Research AreaEnergy & Fuels
WOS SubjectEnergy & Fuels
WOS IDWOS:000504898500015
PublisherMDPI
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/95850
Collection页岩气与地质工程院重点实验室
Corresponding AuthorCheng, Cheng
Affiliation1.China Univ Geosci Beijing, Sch Engn & Technol, Beijing 100083, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China
Recommended Citation
GB/T 7714
Cheng, Cheng,Xu, Nengxiong,Zheng, Bo. Mobilized Mohr-Coulomb and Hoek-Brown Strength Parameters during Failure of Granite in Alxa Area in China for High-Level Radioactive Waste Disposal[J]. ENERGIES,2019,12(22):16.
APA Cheng, Cheng,Xu, Nengxiong,&Zheng, Bo.(2019).Mobilized Mohr-Coulomb and Hoek-Brown Strength Parameters during Failure of Granite in Alxa Area in China for High-Level Radioactive Waste Disposal.ENERGIES,12(22),16.
MLA Cheng, Cheng,et al."Mobilized Mohr-Coulomb and Hoek-Brown Strength Parameters during Failure of Granite in Alxa Area in China for High-Level Radioactive Waste Disposal".ENERGIES 12.22(2019):16.
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