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| Study on Mechanical Properties and Acoustic Emission characteristic parameters of Granite under cyclic disturbance load |
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Received:March 02, 2018
Revised:March 07, 2018
Accepted:March 08, 2018
Published Online:April 16, 2019
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| DOI： |
| KeyWord:Cyclic disturbance;Acoustic emission;Strength of rock;Crack evolution |
| Author | Institution |
| Longenlin |
Kunming University of Science and Technology Land and Resources Engineering College |
| Chenjunzhi |
Kunming University of Science and Technology Land and Resources Engineering College |
| Lichunyi |
Kunming University of Science and Technology Land and Resources Engineering College |
| zhangshuai |
Kunming University of Science and Technology |
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| Abstract: |
| In engineering practice, the rock mass is often subjected to cyclic load disturbance, which shows the different mechanical properties and acoustic emission phenomena under static load. So this article, by studying granite as test object, its mechanical properties under different circulation disturbance frequency and acoustic emission characteristic parameters, and combining the RA value, AF further discusses the evolution regularity of the crack in the process of compression. The test shows that the strength increases with the increase of the number of cycles, and when the number of cycles is greater than a certain amount, the ratio of intensity increase begins to decrease. The more cycles the specimen experiences, the more obvious the sudden increase of acoustic emission in plastic deformation. RA, AF value further show that the granite first appeared in the force to destroy the whole process of shear failure events, near peak intensity, began to appear tension damage events, mainly around the shear zone. |
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