Composite granular backfill in stoping by stripes

In stoping by stripes, an extraction panel is conditionally divided into stripes up to 8 m wide. Extraction of such stripes is carried out in stable ore bodies, by bottom-up slicing with backfill. In this case, cemented backfill mixtures are used as it is impossible to retain hydraulic fills inside the indicated boundaries when the neighbor stripes are cut. The cost of cemented backfill can be saved using a composite granular mixture with tailings which are the source of hazardous environmental pollution. In this method, first a cemented granular mixture is used to erect a retaining wall 0.5–2.9 m thick subject to the dip angle on the side of the next strip to be cut, the rest mined-out void is filled with hydraulic granular mix. Backfill operations are carried out immediately after slicing. Stoping operations are moved to the neighbor extraction panel and are returned as backfill is accomplished. The composite granular backfill method protected by a patent is explained graphically. The basic diagram of granular backfill preparation and haulage is proposed. A simplified example of interaction between side rocks and composite backfill is given.

Keywords: tailings of enrichment, dredging of prirezok layers, cleaning layer, granulated laying, preparation of hydraulic and hardening granulated laying mixes, volume of laying, sequence of laying works, adjacent block, cost of laying works.
For citation:

Pirogov G. G., Voronov E. T. Composite granular backfill in stoping by stripes. MIAB. Mining Inf. Anal. Bull. 2021;(3-2):125-132. [In Russ]. DOI: 10.25018/0236_ 1493_2021_32_0_125.

Acknowledgements:
Issue number: 3
Year: 2021
Page number: 125-132
ISBN: 0236-1493
UDK: 627.22
DOI: 10.25018/0236_1493_2021_32_0_125
Article receipt date: 20.11.2020
Date of review receipt: 01.02.2021
Date of the editorial board′s decision on the article′s publishing: 10.02.2021
About authors:

Pirogov G. G.1, Dr. Sci. (Eng.), Professor;
Voronov E. T.1, Dr. Sci. (Eng.), Professor;
1 Transbaikal State University, Chita, Russia.

 

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