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Bulletin of Engineering Geology and the Environment

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18.07.2020 | Original Paper

Influence of rock percentage on strength and permeability of tailing-waste rock mixtures

verfasst von: Chao Zhang, Changkun Ma, Qinglin Chen, Haiming Liu, Shangwei Wu, Zhenkai Pan, Lei Zhang

Erschienen in: Bulletin of Engineering Geology and the Environment | Ausgabe 1/2021

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Abstract

The strength and permeability of tailing-waste rock mixtures directly affect deposits’ stability for an alternative co-disposal technique. In the mixed co-disposal method, the void of the waste rock is filled with tailings, while the waste rock forms the particle skeleton. This method does not only improve deposits stability but also potentially reduces acid pollution. In this study, the rock percentage influence on the shear strength and permeability of tailing-waste rock mixtures was investigated by carrying out large triaxial tests and permeability tests. The shear strength, enhanced strength mechanism, and mixture permeability were analyzed. The results indicate that the shear strength and internal friction angle of the tailing-waste rock mixtures gently increased until the rock percentage reached 30% and then rapidly increased with the further increase of the rock percentage. The permeability coefficient of the mixtures slowly increased until the rock percentage reached 50% and then rapidly increased with the further increase of the rock percentage. The tailings washed out of the waste rock skeleton when the permeability was large. In this paper, 50% of waste rock is recommended for building mixture deposits.

Vorheriger Artikel A new neural network–based prediction model for Newmark’s sliding displacements

Nächster Artikel A new iteration clustering method for rock discontinuity sets considering discontinuity trace lengths and orientations

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Titel: Influence of rock percentage on strength and permeability of tailing-waste rock mixtures
verfasst von: Chao Zhang
Changkun Ma
Qinglin Chen
Haiming Liu
Shangwei Wu
Zhenkai Pan
Lei Zhang
Publikationsdatum: 18.07.2020
Verlag: Springer Berlin Heidelberg
Erschienen in: Bulletin of Engineering Geology and the Environment / Ausgabe 1/2021
Print ISSN: 1435-9529
Elektronische ISSN: 1435-9537
DOI: https://doi.org/10.1007/s10064-020-01911-x

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