Re-backfill technology and equipment

Underground mining operations alter the stress–strain behavior of rock mass because of generation of mined-out voids. After backfill, voids inevitably remain between the stope roof and backfill mixture surface, which leads to negative consequences. Efficiency of the current methods of under-backfill elimination is limited due to design features of stopes and modes of operations, which essentially confine applicability of these methods. This article analyzes efficiency of the existing mobile equipment available for backfilling. The authors validate rebackfill of under-filled voids using the mobile backfill plant designed at the Saint-Petersburg Mining University. This plant allows wide-range adjustability of backfill feed and thickening of slurry to the required parameters. The pumping equipment can be a peristaltic magnetic pump unit capable to transport highly concentrated substances at low shearing stresses. The studies of the developed equipment performance using the multiphase flow model in AnsysFluent are presented in the article.

Keywords: backfill plant, mobile equipment, under-filled voids, head and flow characteristics, concentration, thickening, concrete pump, peristaltic pump, feed regulator.
For citation:

Vasilyeva M. A., Volchikhina A. A., Morozov M. D. Re-backfill technology and equipment. MIAB. Mining Inf. Anal. Bull. 2021;(6):133-144. [In Russ]. DOI: 10.25018/0236_ 1493_2021_6_0_133.



The study was supported by the Russian Science Foundation, grant 19-79-10151.

Issue number: 6
Year: 2021
Page number: 133-144
ISBN: 0236-1493
UDK: 622.27
DOI: 10.25018/0236_1493_2021_6_0_133
Article receipt date: 05.03.2021
Date of review receipt: 12.04.2021
Date of the editorial board′s decision on the article′s publishing: 10.05.2021
About authors:

M.A. Vasilyeva1, Cand. Sci. (Eng.), Assistant Professor, e-mail:,
A.A. Volchikhina1, Graduate Student,
M.D. Morozov, Cand. Sci. (Eng.), Specialist in Underground Mining Operations, JSC «Polymetal UK», Saint-Petersburg, Russia,
1 Saint-Petersburg Mining University,199106, Saint-Petersburg, Russia.


For contacts:

M.A. Vasilyeva, e-mail:


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