Open AccessStudy on Micro-Structure and Macro-Mechanical Properties of Bush-Restored Tailings Soil
Author(s) -
Qingchao Yang,
Zhe Hao,
Wenjing Cheng,
Da Teng,
Xiaoming Wang,
Lei Sheng-you
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/668/1/012012
Subject(s) - tailings , cohesion (chemistry) , environmental science , phytoremediation , geotechnical engineering , permeability (electromagnetism) , loess , soil water , soil science , geology , materials science , metallurgy , chemistry , biochemistry , organic chemistry , geomorphology , membrane
Taking the tailings pond repaired by sea buckthorn as an example, the effects of shrub restoration on the microstructure and corresponding macroscopic mechanical properties of tailings soil were studied. Phytoremediation and non-phytoremediation of tailings soil were studied by means of scanning electron microscopy, consolidation, infiltration and shear tests. The results show that: Under the action of phytoremediation, the tailing particles have developed from loose and disorderly to compact and orderly. The distribution of tailings soil aggregates tends to be uniform, and the average particle size of tailings soil aggregates has increased slowly and steadily. The time of phytoremediation increased, but the compressibility and permeability of tailings soil decreased gradually. The compressive modulus of tailings soil was increased gradually. The cohesion of tailings soil was increased firstly and then decreased, but it was greater than that of unrepaired tailings soil. Internal friction angle of tailings soil was the trend of decreasing first and then increasing.