Improvement of cemented backfill properties

Mineral mining often involves technologies with cemented backfill, which allows multislice cutting using high capacity mining equipment at minimized loss and dilution of minerals. Such mining systems are undoubtedly beneficial except for an essential fault represented by high cost of mineral production and by a long curing period of backfill. One of the ways to cheapen mining operations in this case is reduction of strength development time of backfill toward enhanced productivity of stoping. This article describes the studies into: cemented backfill strength as a result of electromagnetic activation of mixing water and subsequent ultrasonic treatment of the mixture; strength development in cemented backfill prepared using reinforcement composites; rheological properties of cemented backfill versus content of reinforcement composites. The studies show that the use of backfill prepared using magnetic water and chrysotile-asbestos reinforcement provides the shorter curing period, higher productivity of stoping operations and the reduced cost of binders (cement, fly ash).

Keywords: stowing operations hardening backfill, goaf, magnetization, cement, reinforcing elements chrysotile — asbestos, structure, flowability, strength.
For citation:

Мedvedev V. V., Ovseychuk V. A. Improvement of cemented backfill properties. MIAB. Mining Inf. Anal. Bull. 2021;(3-2):71-80. [In Russ]. DOI: 10.25018/0236_ 1493_2021_32_0_71.

Acknowledgements:
Issue number: 3
Year: 2021
Page number: 71-80
ISBN: 0236-1493
UDK: 622.273.212
DOI: 10.25018/0236_1493_2021_32_0_71
Article receipt date: 20.11.2020
Date of review receipt: 08.01.2021
Date of the editorial board′s decision on the article′s publishing: 10.02.2021
About authors:

Medvedev V. V.1, Cand. Sci. (Eng.), head of Underground Mining department;
Ovseychuk V. A.1, Dr. Sci. (Eng.), professor of Underground Mining department;
1 Transbaikal State University, Chita, Russia.

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