Numerical investigation on the tensile fracturing behavior of rock-shotcrete interface based on discrete element method
Four groups of numerical models of Brazilian tests on rock-shotcrete interfaces were successfully conducted by PFC2D. The tensile strength and Young’s modulus of shotcrete were considered. Six different undulations of rock-shotcrete interface were set up. The influences of multiple parameters on the...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2020-05-01
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| Series: | International Journal of Mining Science and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2095268619303556 |
| _version_ | 1819227039146704896 |
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| author | Jiadong Qiu Lin Luo Xibing Li Diyuan Li Ying Chen Yong Luo |
| author_facet | Jiadong Qiu Lin Luo Xibing Li Diyuan Li Ying Chen Yong Luo |
| author_sort | Jiadong Qiu |
| collection | DOAJ |
| description | Four groups of numerical models of Brazilian tests on rock-shotcrete interfaces were successfully conducted by PFC2D. The tensile strength and Young’s modulus of shotcrete were considered. Six different undulations of rock-shotcrete interface were set up. The influences of multiple parameters on the bearing characteristics of the rock-shotcrete interface were studied. The results showed that a better support performance can be obtained by increasing the Young’s modulus of shotcrete rather than the tensile strength of shotcrete. For different tensile strength and Young’s modulus, the increase of sawtooth height has different effects on the support performance. The failure mechanism of the rock-shotcrete interfaces was analysed in detail. The stress shielding effect and stress concentration effect caused by the shape characteristics of rock-shotcrete interface were observed. The influence of these parameters on the overall support performance should be fully considered in a reasonable support design. |
| first_indexed | 2024-12-23T10:35:02Z |
| format | Article |
| id | doaj.art-a7914998b2ea4b28a95ce6ceb84b6b9a |
| institution | Directory Open Access Journal |
| issn | 2095-2686 |
| language | English |
| last_indexed | 2024-12-23T10:35:02Z |
| publishDate | 2020-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | International Journal of Mining Science and Technology |
| spelling | doaj.art-a7914998b2ea4b28a95ce6ceb84b6b9a2022-12-21T17:50:19ZengElsevierInternational Journal of Mining Science and Technology2095-26862020-05-01303293301Numerical investigation on the tensile fracturing behavior of rock-shotcrete interface based on discrete element methodJiadong Qiu0Lin Luo1Xibing Li2Diyuan Li3Ying Chen4Yong Luo5Shenzhen Key Laboratory of Deep Underground Engineering Sciences and Green Energy, Shenzhen University, Shenzhen 518060, China; Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring, Ministry of Education, Central South University, Changsha 410083, China; School of Resources and Safety Engineering, Central South University, Changsha 410083, ChinaSchool of Resources and Safety Engineering, Central South University, Changsha 410083, China; Center of Rock Mechanics and Geohazards, Shaoxing University, Shaoxing 312000, ChinaSchool of Resources and Safety Engineering, Central South University, Changsha 410083, China; Corresponding author.School of Resources and Safety Engineering, Central South University, Changsha 410083, ChinaSchool of Resources and Safety Engineering, Central South University, Changsha 410083, ChinaSchool of Resources and Safety Engineering, Central South University, Changsha 410083, ChinaFour groups of numerical models of Brazilian tests on rock-shotcrete interfaces were successfully conducted by PFC2D. The tensile strength and Young’s modulus of shotcrete were considered. Six different undulations of rock-shotcrete interface were set up. The influences of multiple parameters on the bearing characteristics of the rock-shotcrete interface were studied. The results showed that a better support performance can be obtained by increasing the Young’s modulus of shotcrete rather than the tensile strength of shotcrete. For different tensile strength and Young’s modulus, the increase of sawtooth height has different effects on the support performance. The failure mechanism of the rock-shotcrete interfaces was analysed in detail. The stress shielding effect and stress concentration effect caused by the shape characteristics of rock-shotcrete interface were observed. The influence of these parameters on the overall support performance should be fully considered in a reasonable support design.http://www.sciencedirect.com/science/article/pii/S2095268619303556Tensile strengthPFCShotcreteFracturing behaviorRock interface |
| spellingShingle | Jiadong Qiu Lin Luo Xibing Li Diyuan Li Ying Chen Yong Luo Numerical investigation on the tensile fracturing behavior of rock-shotcrete interface based on discrete element method International Journal of Mining Science and Technology Tensile strength PFC Shotcrete Fracturing behavior Rock interface |
| title | Numerical investigation on the tensile fracturing behavior of rock-shotcrete interface based on discrete element method |
| title_full | Numerical investigation on the tensile fracturing behavior of rock-shotcrete interface based on discrete element method |
| title_fullStr | Numerical investigation on the tensile fracturing behavior of rock-shotcrete interface based on discrete element method |
| title_full_unstemmed | Numerical investigation on the tensile fracturing behavior of rock-shotcrete interface based on discrete element method |
| title_short | Numerical investigation on the tensile fracturing behavior of rock-shotcrete interface based on discrete element method |
| title_sort | numerical investigation on the tensile fracturing behavior of rock shotcrete interface based on discrete element method |
| topic | Tensile strength PFC Shotcrete Fracturing behavior Rock interface |
| url | http://www.sciencedirect.com/science/article/pii/S2095268619303556 |
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