Study On Creep Property Of Rock Salt With Salt-Mudstone Interlayer And Stability Of Oil And Gas Storage Cavern

The typical characters of rock salt deposit geology structure in our country determine that building energy storage and nuclear waste disposal in rock salt deposit can be influenced by rock salt with salt-mudstone interlayer whether we adopt level underground chamber or plumb underground chamber.As a consequence, it is the key promble of storage cavern's stability to research mechanics characteristics on rock salt with salt-mudstone interlayer.The topic of development in this text is study on creep property of rock salt with salt-mudstone interlayer and stability of oil and gas storage cavern. The systemic studies have been processed on creep property, rheology mechanism, creep constitutive equation of rock salt with salt-mudstone interlayer by experimental research, theoretics analysis and numerical simulation. The theory of stability on oil and gas storage cavern in rock salt deposit has been established and numerical simulation on elastic-plastic property and visco-elastic-plastic property have been carried out.These are the chief research contents and results. As follows(1) Experimental investigations on creep property of rock salt with salt-mudston-e interlayer.Through experimental investigations on creep property of rock salt with salt-mudstone interlayer in HUIBEI-yingcheng at normal temperature and high temperature, the research results show that rock salt with salt-mudstone interlayer has time-dependent effect.It is significantly influenced on the creep property by loading stress and temperature. The creep strains come from two parts. One part is the creep strain of salt rock itself and the other is the rock salt with salt-mudstone interlayer. Both of the deformation is out of line. The shear stress is produced...