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- W2890912087 abstract "This research focused on the impact of mining on the permeability of key aquifuge (N2 laterite) that is widespread in the arid and semi-arid areas of northwestern China and is critical for preserving water resources. The impact of mining stress recovery on the permeability of cracked N2 laterite was assessed for parts of northwestern China that included the Jingle laterite and Baode laterite. The mineral compositions and swelling properties of the laterite at both locations were examined, and analytical results showed that the laterite contained abundant clay minerals. The Baode laterite exhibited higher expansibility than Jingle laterite. The triaxial creep permeability performance of laterite specimens with a prefabricated crack width of 1.0, 1.5, and 2.5 mm were tested. The results indicated that strain of cracked laterite all exhibited transient creep following each level of loading, and then unstable creep and stable creep. With the increase of loading, the transient creep deformation corresponding to each level of loading decreased, the unstable creep deformation produced by identical loading gradually and incrementally increased. The nonlinear power function equation was selected to fit creep grading curves which have high precision. The cracks within the laterite gradually closed with the stress recovery, and permeability gradually recovered. During the stress recovery, the narrower cracks exhibited a smaller change in permeability. However, for narrow cracks in mining soil, permeability recovered after mining stress when permeability was closer to initial permeability, and the Baode laterite showed greater recovery than that of the Jingle laterite." @default.
- W2890912087 created "2018-09-27" @default.
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- W2890912087 date "2018-09-01" @default.
- W2890912087 modified "2023-09-26" @default.
- W2890912087 title "Study on the creep permeability of mining-cracked N2 laterite as the key aquifuge for preserving water resources in Northwestern China" @default.
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- W2890912087 doi "https://doi.org/10.1007/s40789-018-0214-5" @default.
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