Volume 47 Issue 5
Oct.  2019
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WANG Xuedong, LI Shiyu, SUN Yanfeng, YE Guo. Influence of the freezing-thawing cycles on soil-water characteristics of soil in open-pit mine dumping sites[J]. COAL GEOLOGY & EXPLORATION, 2019, 47(5): 138-143. DOI: 10.3969/j.issn.1001-1986.2019.05.019
Citation: WANG Xuedong, LI Shiyu, SUN Yanfeng, YE Guo. Influence of the freezing-thawing cycles on soil-water characteristics of soil in open-pit mine dumping sites[J]. COAL GEOLOGY & EXPLORATION, 2019, 47(5): 138-143. DOI: 10.3969/j.issn.1001-1986.2019.05.019
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Influence of the freezing-thawing cycles on soil-water characteristics of soil in open-pit mine dumping sites

  • College of Mining, Liaoning Technical University, Fuxin 123000, China

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National Natural Science Foundation of China(51604140)

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  • Received Date: November 13, 2018
  • Published Date: October 24, 2019
    Graphical Abstract
    • Abstract
  • In order to study the unsaturated soil-water characteristics of soil under freezing-thawing cycles, the soil in Yuanbaoshan open-pit mine dumping site was selected as the research object. The variation of matrix suction and structure of soil under different water content after different freezing-thawing cycles was studied. The results show that during the same freezing-thawing cycles, the matrix suction increases with the decrease of water content, and the range increases gradually. The soil-water characteristic curve can be divided into sensitive stage, sub-sensitive stage and insensitive stage. With the increase of freezing-thawing cycles, the curvature of soil-water characteristic curve increases first and then tends to be stable, and the sensitivity of matrix suction to the increase of freezing-thawing cycles decreases gradually. Freezing-thawing cycles destroy the uniformity of soil particles, and the influence of initial freezing-thawing cycles is the most significant. Van-Genuchten model can better predict the soil-water characteristic curve of soil. Therefore, the influence of freezing-thawing cycles on the stability of dump slope should be emphasized in the process of mine dumping.
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    • References (16)
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