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Tailings are the co-product of mining activities which is usually deposited in the form of slurry with high water content and compressibility. Consolidation properties of tailing materials are important for any disposal and storage actions, posing significant challenges in mining industry. In the present study, laboratory experiments were performed to investigate the compressibility and consolidation properties of coal mine tailings. The investigation were carried out on material with different grain-sizes upon application of incremental loads in a large-scale Rowe cell. The samples were collected from open pit Turów Coal Mine in Poland. Remolded samples were manufactured in laboratory as three batches of different size-ratio between fine and coarse particles, i.e. 0.5, 0.75, 0.25. Simultaneous measurements of settlements together with pore water pressure were used for determination of coefficient of consolidation, c v . For this purpose gradient method was used which is applicable for whole the consolidation curve including secondary consolidation.

Large-scale Rowe cell experimental study on coefficient of consolidation of coal mine tailings