高寒地区废石破碎胶结充填体强度特性试验研究与工业应用

doi:10.13722/j.cnki.jrme.2015.01.015

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Abstract Cemented backfilling technology has been increasingly used in the exploitation of mineral resources under the low temperature condition，but it has also brought about a series of difficult issues，such as the problem of poor strength of backfilling materials，the collapse and the failing. The effects of the curing temperature，the cement content and the slurry concentration on the strength of backfilling materials were thus studied experimentally to tackle the problems faced in a gold mine at cold region. The rational proportions of mixed material contents and the curing temperature of paste of cement-rock debris mixture were determined to meet the requirement of gravitational transportation. The experimental results revealed that the cemented rock debris was better than the iron ore tailings as the backfilling material and its slurry concentration reached to 75%. The low temperature was found to hinder the hydration. The higher the curing temperature was，the higher the uniaxial compressive strength (UCS). The increasing of curing temperature improved the strength of backfilling material. The curing temperature influenced more on the early strength but little on the later strength of backfilling material. The heated water for rock debris mixing and cementation was therefore proposed and applied successfully in an industrial experiment.

Key words： mining engineering curing temperature rock debris mixed proportion uniaxial compressive strength(UCS)

Received: 25 December 2013

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2015.01.015 OR http://www.rockmech.org/EN/Y2015/V34/I01/139

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