Stability of a Rock Cavern for Underground LPG Storage Under Thermal Stresses

The practical application of the rock cavern storage of liquefied fuels (such as natural gas, liquid hydrogen or dimethyl ether) requires stability analysis of the cavern in question with regard to thermal stress, and an understanding of thermophysical properties and mechanical properties of rock mass is essential for such analysis.In our research, a linear expansion strain measurement test up to −170℃ was first conducted using Kimachi sandstone (24.0% porosity) to study the relationship between the freezing of pore water and its expansion strain. Then a uniaxial compression test and indirect tensile test were conducted with wet sandstone cooled down below freezing point to ultralow temperatures to review the influence of the formation of pore ice on the strength of wet sandstone. The following findings were obtained.When Kimachi sandstone is cooled down, frost swelling occurs twice, and therefore the linear expansion coefficient fluctuates over range of temperatures between 0 to −70℃ . This may be because pores of two different sizes exist in Kimachi sandstone and the freezing temperature of the pore water differs depending on the pore size. The compressive strength and indirect tensile strength of the wet sandstone increase with the decrease in the specimen temperature. Two causes of this phenomenon may be identified. One is that an increase in pore ice that shares the load is the main cause of the phenomenon in temperatures down to −50℃ where freezing of the pore water is almost completed. The other is that an increase in strength by volumetric shrinkage of the rock forming minerals and pore ice is the main cause in temperatures below −50℃ .

show abstract

Shear Strength Characteristics of Kimachi Sandstone in an Environment with Ultralow Temperatures

Kamoshida

Okawara

Abe

2015

Journal of the Mining and Materials Processing Institute of Jap

View full text Add to dashboard Cite

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

hi@scite.ai

334 Leonard St

Brooklyn, NY 11211

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Stability of a Rock Cavern for Underground LPG Storage Under Thermal Stresses

Cited by 3 publications

References 12 publications

Thermal Failure Behavior of Rock at High Temperatures

Thermal Failure Behavior of Rock at High Temperatures

Mechanical Behavior of Kimachi Sandstone under Ultralow Temperature

Shear Strength Characteristics of Kimachi Sandstone in an Environment with Ultralow Temperatures

Contact Info

Product

Resources

About