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| Mechanical strength properties of fiber-doped layered cemented backfill |
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Received:January 14, 2022
Revised:March 03, 2022
Accepted:March 04, 2022
Published Online:June 10, 2022
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| DOI： |
| KeyWord:fiber; layered filling; uniaxial compressive strength; failure mode; filling mechanical properties |
| Author | Institution |
| WangXichan |
昆明理工大学国土资源工程学院 |
| 郭忠林 |
昆明理工大学国土资源工程学院 |
| 孙 伟 |
昆明理工大学国土资源工程学院;云南省中-德蓝色矿山与特殊地下空间开发利用重点实验室 |
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| Abstract: |
| Aiming at the problems of low cementation strength and easy cracking of the filling body, an experimental study on the influence of fiber type and number of layers on the uniaxial compressive strength of the filling body was carried out.The research results show that the filling body without fiber is tensile failure, and the filling body doped with fiber shows a drum-like expansion under pressure, and the whole is cracked and continuously maintained, maintaining a high integrity.The layered layer deteriorates the mechanical properties of the filling body to a certain extent, and the uniaxial compressive strength of the filling body gradually decreases with the increase of the layered layer. The added fiber filler still has a certain bearing capacity after reaching the peak load, showing the characteristics of "crack but not broken". By comparing the three fibers of polyacrylonitrile fiber, glass fiber and polyacrylonitrile fiber, adding polyacrylonitrile fiber is more conducive to the improvement of filling mechanical properties. |
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