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- Title
Mechanical strength properties of fiber-doped layered cemented backfill.
- Authors
WANG Xichan; GUO Zhonglin; SUN Wei
- 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.
- Subjects
PEAK load; COMPRESSIVE strength; GLASS fibers
- Publication
Nonferrous Metals (Mining Section), 2022, Vol 74, Issue 3, p16
- ISSN
1671-4172
- Publication type
Article
- DOI
10.3969/j.issn.1671-4172.2022.03.003