Damage law of cemented tailings backfill with different contents of glass fiber and its match with rock mass

被引：0
|
作者：
Zhao K. [1 ,2 ]
Zhao K. [1 ,2 ]
Yan Y. [2 ]
Zhou Y. [1 ]
Yang J. [1 ]
Wu J. [1 ]
机构：
[1] School of Civil and Surveying and Mapping Engineering, Jiangxi University of Science and Technology, Jiangxi, Ganzhou
[2] Solids Waste and Chemicals Management Center, Ministry of Ecology and Environment, Beijing
来源：
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2023年 / 42卷 / 01期
基金：
中国国家自然科学基金;
关键词：
cemented tailings backfill; damage; glass fiber; initial elastic modulus; peak specific energy; rock mechanics;
D O I：
10.13722/j.cnki.jrme.2021.1252
中图分类号：
学科分类号：
摘要：
In order to improve the stability of mined-out areas after filling in a metal mine，the damage law of cemented tailings backfill with different contents(0%，0.5% and 0.7%) of glass fibers was studied. The stress-strain curves of cemented tailings backfill with different contents of glass fiber were obtained by uniaxial compression. The energy dissipation law of backfill was analyzed according to the damage constitutive equation，and its match with rock mass was obtained. The results show that：(1) in a certain range，the strength of backfill is improved with the addition of glass fiber but the elastic modulus is reduced. (2) The damage value of backfill when reaching the peak stress is reduced with adding glass fiber，but with the increase of its contents，the process of damage value reaching the maximum of backfill is slower. (3) The calculation model of peak specific energy of backfill with different contents of glass fiber is obtained，and the peak specific energy of backfill increases with the increase of contents of glass fiber. (4) Based on the filling mining of the mine，the design model of the depth of the goaf and the strength of the backfill is obtained，which can provide a scientific basis for saving the backfill cost of the mine. © 2023 Academia Sinica. All rights reserved.
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页码：144 / 153
页数：9
相关论文
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