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Copyright © 2021 Z. H. Wang et al. This is an open access article distributed under the Creative Commons Attribution License (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. https://creativecommons.org/licenses/by/4.0/

Abstract

Disposal of high-level radioactive waste (HLW) deep underground is one of the most challenging research subjects in rock engineering. In China, Beishan granite is usually chosen as host rock for the construction of the HLW repository. In this study, mechanical tests are conducted on Beishan granite and the stress-strain state during the complete failure process is analyzed by numerical simulation. The results show that the tensile strength and uniaxial compressive strength of Beishan granite are 8.66 and 162.9 MPa, respectively. Dilatancy appears when the stress reaches about 81% of the peak strength. Heterogeneity is introduced by Weibull distribution in numerical simulation. With the increase of homogenization degree, the degraded elements are more easily to concentrate locally. Based on experimental and numerical simulation results, it is noticeable that the sample volume is basically in the state of compaction before reaching the peak strength. The elements are more likely to show expansion, and the splitting failure dominates the destroy mode when the confining pressure is relatively low. With increasing confining pressure, more and more degraded elements are concentrated in the shear band, which develops from the surface to the interior of the sample during loading. Therefore, the granite shows ductile mechanical response characteristics when the confining pressure is relatively high. The results are instructive for the construction of the repository.

Details

Title
Experimental and Numerical Study on Mechanical Properties and Deformation Behavior of Beishan Granite considering Heterogeneity
Author
Wang, Z H 1   VIAFID ORCID Logo  ; Tan, Y L 1 ; Li, S M 2 ; Wang, T Z 3 ; Wu, X C 4 

 State Key Laboratory of Mining Disaster Prevention and Control Cofounded By Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, Shandong, China; College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, Shandong, China 
 Jinan Engineering Polytechnic, Jinan 250200, Shandong, China 
 China Construction Eighth Engineering Division Corp. Ltd. Construction Branch, Qingdao 266590, Shandong, China 
 Design and Research Institute of Tianyuan Construction Group Co. Ltd., Linyi 276000, Shandong, China 
Editor
Yu-Wei Chen
Publication year
2021
Publication date
2021
Publisher
John Wiley & Sons, Inc.
ISSN
16878086
e-ISSN
16878094
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2520675457
Copyright
Copyright © 2021 Z. H. Wang et al. This is an open access article distributed under the Creative Commons Attribution License (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. https://creativecommons.org/licenses/by/4.0/