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Journal of Mining Sciences

2019 year, number 5

SELECTION OF FROZEN BACKFILL MIXTURE COMPOSITION

M. V. Kaimonov, Yu. A. Khokholov
Chersky Institute of Mining of the North, Siberian Branch, Russian Academy of Sciences, Yakutsk, 677980 Russia
Keywords: Рудник, льдопородная закладка, криолитозона, многолетнемерзлые породы, температура пород, смерзание, математическое моделирование, Mine, frozen backfill, permafrost zone, permafrost, rock temperatures, adfreezing, mathematical modeling

Abstract

Artificial frozen backfill for coal and ore mines in permafrost zone is discussed. Optimal frozen mixtures with the required strength characteristics are determined. It is shown that load-bearing capacity of backfill depends on grain size composition and volumetric content of ice. The mathematical model of layer-by-layer backfilling is developed, and the freezing time is found. Varying mixture composition and freezing parameters allows arriving at the required strength of frozen backfill at minimal filling time.