Experimental and numerical analysis of desiccation of a mining waste

R. Rodriguez, Marcelo Sanchez, A. Ledesma, A. Lloret

Research output: Contribution to journalArticle

99 Citations (Scopus)

Abstract

The paper presents an analysis of the desiccation process in mining materials, based on physical laws. Due to the process complexity, most of the previous approaches used have an empirical basis. In this case, however, a formulation using coupled hydromechanical equations has been considered. To show the capabilities of the theoretical framework, several laboratory tests were performed, and afterwards a numerical simulation of the measured variables was attempted. The material tested was a metallurgical waste in tailings form and it was exposed to atmospheric desiccation. Further cracking will eventually change its properties, and this may have an environmental impact. Some of the experiments were devoted to material characterization, including the water retention curve, the hydraulic conductivity, and the tensile strength. In addition, laboratory drying tests open to the atmosphere or in hermetically closed containers were also performed. The numerical analyses carried out attempted to simulate some of these tests. One of the main outcomes of the analyses was the prediction of the time and the location of crack initiation. Finally, it should be pointed out that good agreement between the experiments and numerical simulations indicates that the formulation is taking into account the fundamental mechanisms involved in the desiccation process.
LanguageEnglish
Pages644-658
Number of pages14
JournalCanadian Geotechnical Journal
Volume44
Issue number6
DOIs
Publication statusPublished - 2007

Fingerprint

desiccation
Numerical analysis
Hydraulic conductivity
Computer simulation
Tailings
water retention
tensile strength
Crack initiation
tailings
simulation
Containers
Environmental impact
hydraulic conductivity
Drying
crack
Tensile strength
environmental impact
experiment
Experiments
atmosphere

Keywords

  • desiccation
  • drying cracks
  • unsaturated soils
  • waste material
  • coupled phenomena
  • modelling

Cite this

Rodriguez, R. ; Sanchez, Marcelo ; Ledesma, A. ; Lloret, A. / Experimental and numerical analysis of desiccation of a mining waste. In: Canadian Geotechnical Journal. 2007 ; Vol. 44, No. 6. pp. 644-658.
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Rodriguez, R, Sanchez, M, Ledesma, A & Lloret, A 2007, 'Experimental and numerical analysis of desiccation of a mining waste' Canadian Geotechnical Journal, vol. 44, no. 6, pp. 644-658. https://doi.org/10.1139/T07-016

Experimental and numerical analysis of desiccation of a mining waste. / Rodriguez, R.; Sanchez, Marcelo; Ledesma, A.; Lloret, A.

In: Canadian Geotechnical Journal, Vol. 44, No. 6, 2007, p. 644-658.

Research output: Contribution to journalArticle

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