Mechanical properties and fracture behavior of sandstone similar materials with different joint positions and thicknesses based on triaxial testing and PFC simulation
The mechanical properties and failure characteristics of joined rocks have an important impact on the disaster prevention of underground engineering and the sustainable development of mineral resources. The effects of confining pressure, joint location, and joint thickness on the mechanical properti...
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| Format: | Article |
| Language: | English |
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Polish Academy of Sciences
2024-12-01
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| Series: | Archives of Civil Engineering |
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| Online Access: | https://journals.pan.pl/Content/133488/38_1k.pdf |
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| author | Wei Jing Bingpeng Lu Laiwang Jing Rencai Jin |
| author_facet | Wei Jing Bingpeng Lu Laiwang Jing Rencai Jin |
| author_sort | Wei Jing |
| collection | DOAJ |
| description | The mechanical properties and failure characteristics of joined rocks have an important impact on the disaster prevention of underground engineering and the sustainable development of mineral resources. The effects of confining pressure, joint location, and joint thickness on the mechanical properties of rock-like specimens under triaxial test have been studied. Furthermore, using the "DFN-age" function of PFC numerical simulation, the stress characteristics, and failure characteristics of rock specimens under different confining pressure, joint location and joint thickness are analyzed. The research results indicate that as the thickness of the joint increases and the joint position approaches the center of the specimen, the compressive strength of the specimen decreases. As the confining pressure increases, the compressive strength increases and failure modes of rock like specimens with different joint types also tend to be similar. The specimens manifest complex shear-tensile composite failures. In addition, the initiation cracks and main control cracks at the joint terminus can be classified as reverse tensile wing cracks, reverse shear cracks, shear cracks and tensile wing cracks. When the joint thickness of the specimen is 1.0 mm and the distance from the joint position to the center of the specimen is 10–20 mm, the crack evolution characteristics and stress distribution law of the specimen will undergo a transformation. |
| format | Article |
| id | doaj-art-675aed1ae3bb472984885bd3a26e3b7e |
| institution | Kabale University |
| issn | 1230-2945 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Polish Academy of Sciences |
| record_format | Article |
| series | Archives of Civil Engineering |
| spelling | doaj-art-675aed1ae3bb472984885bd3a26e3b7e2024-12-23T09:57:36ZengPolish Academy of SciencesArchives of Civil Engineering1230-29452024-12-01vol. 70No 4https://doi.org/10.24425/ace.2024.151913Mechanical properties and fracture behavior of sandstone similar materials with different joint positions and thicknesses based on triaxial testing and PFC simulationWei Jing0https://orcid.org/0000-0002-0256-7655Bingpeng Lu1https://orcid.org/0009-0001-4468-0349Laiwang Jing2https://orcid.org/0000-0002-9508-5101Rencai Jin3https://orcid.org/0000-0002-8028-3658Anhui University of Science and Technology, State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, 168 Taifeng Street, Huainan City, Anhui Province, ChinaAnhui University of Science and Technology, State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, 168 Taifeng Street, Huainan City, Anhui Province, ChinaAnhui University of Science and Technology, State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, 168 Taifeng Street, Huainan City, Anhui Province, ChinaChina MCC17 Group Co., LTD., Civil Engineering Post-doctoral Research Workstation, No. 88 Yushan East Road, Huashan District, Ma’anshan City, Anhui Province, ChinaThe mechanical properties and failure characteristics of joined rocks have an important impact on the disaster prevention of underground engineering and the sustainable development of mineral resources. The effects of confining pressure, joint location, and joint thickness on the mechanical properties of rock-like specimens under triaxial test have been studied. Furthermore, using the "DFN-age" function of PFC numerical simulation, the stress characteristics, and failure characteristics of rock specimens under different confining pressure, joint location and joint thickness are analyzed. The research results indicate that as the thickness of the joint increases and the joint position approaches the center of the specimen, the compressive strength of the specimen decreases. As the confining pressure increases, the compressive strength increases and failure modes of rock like specimens with different joint types also tend to be similar. The specimens manifest complex shear-tensile composite failures. In addition, the initiation cracks and main control cracks at the joint terminus can be classified as reverse tensile wing cracks, reverse shear cracks, shear cracks and tensile wing cracks. When the joint thickness of the specimen is 1.0 mm and the distance from the joint position to the center of the specimen is 10–20 mm, the crack evolution characteristics and stress distribution law of the specimen will undergo a transformation.https://journals.pan.pl/Content/133488/38_1k.pdfdifferent thicknesses and positions of jointsjointed rock massmechanical propertiesspatio-temporal evolution of crackspfc simulation |
| spellingShingle | Wei Jing Bingpeng Lu Laiwang Jing Rencai Jin Mechanical properties and fracture behavior of sandstone similar materials with different joint positions and thicknesses based on triaxial testing and PFC simulation Archives of Civil Engineering different thicknesses and positions of joints jointed rock mass mechanical properties spatio-temporal evolution of cracks pfc simulation |
| title | Mechanical properties and fracture behavior of sandstone similar materials with different joint positions and thicknesses based on triaxial testing and PFC simulation |
| title_full | Mechanical properties and fracture behavior of sandstone similar materials with different joint positions and thicknesses based on triaxial testing and PFC simulation |
| title_fullStr | Mechanical properties and fracture behavior of sandstone similar materials with different joint positions and thicknesses based on triaxial testing and PFC simulation |
| title_full_unstemmed | Mechanical properties and fracture behavior of sandstone similar materials with different joint positions and thicknesses based on triaxial testing and PFC simulation |
| title_short | Mechanical properties and fracture behavior of sandstone similar materials with different joint positions and thicknesses based on triaxial testing and PFC simulation |
| title_sort | mechanical properties and fracture behavior of sandstone similar materials with different joint positions and thicknesses based on triaxial testing and pfc simulation |
| topic | different thicknesses and positions of joints jointed rock mass mechanical properties spatio-temporal evolution of cracks pfc simulation |
| url | https://journals.pan.pl/Content/133488/38_1k.pdf |
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