期刊
GEOTECHNICAL AND GEOLOGICAL ENGINEERING
卷 35, 期 2, 页码 645-662出版社
SPRINGER
DOI: 10.1007/s10706-016-0131-6
关键词
Mine tailings; Crushed development waste rock; Aggregate; Cemented tailings paste aggregate fill (PAF); Water drainage; Compressive strength; Particles segregation
资金
- NSERC Discovery Grant
- Research Institute in Mining and Environment (RIME) of the Universite du Quebec en Abitibi-Temiscamingue (UQAT)
- Canadian Network for Research and Innovation in Machining Technology, Natural Sciences and Engineering Research Council of Canada [RGPIN/ 4994-2014]
This paper aims at investigating some physical and mechanical characteristics of cemented tailings paste incorporating different amounts of crushed waste rocks (hereinafter called paste aggregate fill, PAF) for underground stope filling. Different mixture formulations were prepared with three classes of crushed waste rocks (or aggregate) grain size, namely 0/10, 0/15 and 0/20 mm. The amount of crushed waste rocks in the PAF mixtures ranges from 10 to 50% by volume (% v/v) (or 8-45% by mass, % m) of dry mill tailings and crushed waste rocks. The results show that the addition of crushed waste rocks in cemented tailings paste mixtures allows a significant unconfined compressive strength (UCS) development after 28 and 90 days of curing. The highest UCS was obtained from the mixtures containing 50% v/v of crushed waste rocks of class of size 0/15 mm. The PAF mixtures with the coarser crushed waste rocks (class of size of 0/20 mm) exhibit some particles segregation.
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