Creep property experiment and constitutive relation of salt-mudstone interlayer
TANG Ming-ming
WANG Zhi-yin
DING Guo-sheng
RAN Li-na
Abstract：In order to understand the mechanical characteristics of the surrounding layered rock salt of a gas storage cavern in Jiangsu Province, creep experimental studies of triaxial compression under different confining pressures were carried out on three kinds of rock samples which were rock salt, mudstone and salt-mudstone interlayer. The experiments indicate that the duration of the first creep stage of salt-mudstone interlayer is larger than that of mudstone and almost the same as that of rack salt. The duration of the first creep stage is mainly dominated by the salt part of sample. The stability creep rate of the second creep stage shows a large difference because the content of mudstone in saltmudstone interlayer is different. Under the same stress conditions,the stability creep rate of the second creep stage of salt-mudstone interlayer is much larger than that of rock salt and less than that of mudstone. According to the property of the second creep stage of three kinds of samples and the volume content of mudstone in sah-mudstone interlayer, the relations between the creep parameters of salt-mudstone interlayer and the creep parameters of mudstone and rock salt were obtained.
Keywords：salt-mudstone interlayercreep propertystability creep rateBurgers creep model
Publication Date：2010-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 42-45 )