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| INFLUENCE OF DRY-WET CIRCULATION ON SHEAR PROPERTIES OF SANDSTONE |
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Received:September 07, 2017
Revised:September 07, 2017
Accepted:September 18, 2017
Published Online:July 31, 2018
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| DOI： |
| KeyWord:rock;mechanics, sandstone, dry-wet;circulation, shear;properties |
| Author | Institution |
| WANG Huiqiong |
Yunnan vocational institute of energy technology,Qujing |
| HUANG Weihui |
Jiangxi Institute of Engineering Prospecting,Nuke Industry,Nanchang |
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| Abstract: |
| In order to grasp the influence of the dry-wet circulation on rock mechanics characteristics, taking the sandstone as an example, a series of shear tests were conducted by YZW50 microcomputer control electric stress direct shear apparatus, 6 kinds of tests of different dry-wet circulation number were set, which respectively were 1, 5, 10, 15, 20 and 30 times. The test results show that the shear characteristics of sandstone have obvious wetting-drying effect, when the dry-wet number is 30 times, the cohesion is 7.31MPa, the internal friction angle is 34.82°, and comparing with 1 times, native state, the falling range of which are severally up to 37.31% and 20.59. In addition, with the increase of dry-wet number, the failure characteristics of sandstone are also changed, and a transformation law from brittleness to ductility is showed. |
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