An Experimental Study on Cracking Behavior of Precracked Sandstone Specimens under Seepage Pressure
This paper aims to investigate the strength and failure mechanism of fractured rock under seepage pressure. For this purpose, precracked sandstone specimens were prepared with different fissure angles, and a seepage pressure loading device was created. Together with the acoustic emission (AE) system...
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2018/4068918 |
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| _version_ | 1832551586511978496 |
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| author | Qibin Lin Ping Cao Hua Wang Rihong Cao |
| author_facet | Qibin Lin Ping Cao Hua Wang Rihong Cao |
| author_sort | Qibin Lin |
| collection | DOAJ |
| description | This paper aims to investigate the strength and failure mechanism of fractured rock under seepage pressure. For this purpose, precracked sandstone specimens were prepared with different fissure angles, and a seepage pressure loading device was created. Together with the acoustic emission (AE) system, the loading device was adopted to perform uniaxial compression tests with or without seepage pressure. The main results are as follows. Combined with axial stress-strain curves, photographic monitoring results and the output of AE counts and rock failure process can be generally divided into four stages: microcrack closure, elastic deformation, crack growth and propagation, and final failure. The seepage pressure had a significant effect on the mechanical properties of the specimens: the specimens under seepage pressure lagged far behind those without seepage pressure in peak strength but maintained a comfortable lead in peak strain. Under seepage pressure, the typical failure features of the specimens varied with the fissure angles: the specimens with small fissure angles (i.e., [0°,30°]) mainly underwent tensile failure; those with medium fissure angles (i.e., [30°,60°]) suffered from shear failure; and those with large fissure angles (i.e., [60°,75°]) were prone to tensile-shear failure. |
| format | Article |
| id | doaj-art-14808ce29c754c6a84059fca5817c73e |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-14808ce29c754c6a84059fca5817c73e2025-02-03T06:00:59ZengWileyAdvances in Civil Engineering1687-80861687-80942018-01-01201810.1155/2018/40689184068918An Experimental Study on Cracking Behavior of Precracked Sandstone Specimens under Seepage PressureQibin Lin0Ping Cao1Hua Wang2Rihong Cao3School of Resources and Safety Engineering, Central South University, Changsha, Hunan 410083, ChinaSchool of Resources and Safety Engineering, Central South University, Changsha, Hunan 410083, ChinaSchool of Resources and Safety Engineering, Central South University, Changsha, Hunan 410083, ChinaSchool of Resources and Safety Engineering, Central South University, Changsha, Hunan 410083, ChinaThis paper aims to investigate the strength and failure mechanism of fractured rock under seepage pressure. For this purpose, precracked sandstone specimens were prepared with different fissure angles, and a seepage pressure loading device was created. Together with the acoustic emission (AE) system, the loading device was adopted to perform uniaxial compression tests with or without seepage pressure. The main results are as follows. Combined with axial stress-strain curves, photographic monitoring results and the output of AE counts and rock failure process can be generally divided into four stages: microcrack closure, elastic deformation, crack growth and propagation, and final failure. The seepage pressure had a significant effect on the mechanical properties of the specimens: the specimens under seepage pressure lagged far behind those without seepage pressure in peak strength but maintained a comfortable lead in peak strain. Under seepage pressure, the typical failure features of the specimens varied with the fissure angles: the specimens with small fissure angles (i.e., [0°,30°]) mainly underwent tensile failure; those with medium fissure angles (i.e., [30°,60°]) suffered from shear failure; and those with large fissure angles (i.e., [60°,75°]) were prone to tensile-shear failure.http://dx.doi.org/10.1155/2018/4068918 |
| spellingShingle | Qibin Lin Ping Cao Hua Wang Rihong Cao An Experimental Study on Cracking Behavior of Precracked Sandstone Specimens under Seepage Pressure Advances in Civil Engineering |
| title | An Experimental Study on Cracking Behavior of Precracked Sandstone Specimens under Seepage Pressure |
| title_full | An Experimental Study on Cracking Behavior of Precracked Sandstone Specimens under Seepage Pressure |
| title_fullStr | An Experimental Study on Cracking Behavior of Precracked Sandstone Specimens under Seepage Pressure |
| title_full_unstemmed | An Experimental Study on Cracking Behavior of Precracked Sandstone Specimens under Seepage Pressure |
| title_short | An Experimental Study on Cracking Behavior of Precracked Sandstone Specimens under Seepage Pressure |
| title_sort | experimental study on cracking behavior of precracked sandstone specimens under seepage pressure |
| url | http://dx.doi.org/10.1155/2018/4068918 |
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