RESEARCH ARTICLE


Study on Creep Characteristics of Cemented Waste Rock Backfills



Changhong Li*, 1, 2, Qiantian Ma1, 2, Guoliang Chen3, Hai Shao4
1 Key Laboratory of the Ministry of Education of China for High-efficient Mining and Safety of Metal Mines, University of Science and Technology Beijing, Beijing, China
2 School of Civil and Environmental Engineering, University of Sci-ence and Technology Beijing, Beijing, China
3 Ganzhou rare earth mineral industry CO.LTD, Ganzhou, China
4 Technical Center for Geo-hazards Emergency of MLR, Beijing, China


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Creative Commons License
© 2015 Li et al;

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.



Abstract

Slip instability and tensor instability are two kinds of failure modes of cemented waste rock backfills. In order to simulate the creep characteristics of cemented waste rock backfills, PFC was carried out. The results show that: rocks inside the models will have displacement under load. The expansion is caused by large lateral displacement of the rocks. A non-stationary creep model of cemented waste rock backfills was established based on the results of simulation. This model can be used to describe the whole creep characteristics of cemented waste rock backfills better.

Keywords: Cemented waste rock backfills, non-stationary Nishihara model, PFC, short-time creep.