Research progress on the mechanical properties of cemented tailings backfill under in-situ conditions
The curing process of cemented tailings backfill(CTB)in practical stopes is influenced by in-situ factors such as temperature and pressure,leading to significant differences in mechanical properties between laboratory-prepared CTB samples and core samples of in-situ backfill with the same recipe.Accurately predicting the mechanical properties of CTB under in-situ conditions is essential for ensuring a reasonable and cost-effective backfill design.Currently,the impact of individual environmental factor on the mechanical properties of CTB has achieved substantial results.However,quantitative studies on the mechanical properties of CTB under the coupling of multiple environmental factors are still insufficient.This paper systematically reviews the research progress on the mechanical properties of CTB under in-situ conditions.It discusses advancements in four aspects:curing pressure,curing temperature,pore water pressure,and backfill curing devices.First,the paper systematically organizes research on the impact of three in-situ environmental factors—curing pressure,curing temperature,and pore water pressure—on the strength of CTB.Then,it analyzes the advantages and disadvantages of existing backfill curing devices.Based on this,a new backfill curing device invented by BGRIMM Technology Group is introduced.This device can simulate the curing conditions of in-situ environmental temperature,pressure,and pore water pressure in a laboratory setting,enabling quantitative research on the impact of in-situ environmental factors on the mechanical properties of CTB.
in-situ conditionscemented tailings backfillmechanical propertiesmine backfillmining with backfill
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