Creep-permeability behavior of sandstone considering thermal-damage

Bo Hu , Sheng-Qi Yang , Wen-Ling Tian

Abstract

This investigation presented conventional triaxial and creep-permeability tests on sandstones considering thermally-induced damage (TID). The TID had no visible effects on rock surface color, effective porosity and permeability below 300oC TID level. The permeability enlarged approximately two orders of magnitude as TID increased to 1000oC level. TID of 700oC level was a threshold where the influence of TID on the normalized mass and volume of the specimen can be divided into two linear phases. Moreover, no prominent variations in the deformation moduli and peak strength and strain appeared as TID

Key Words

thermally-induced damage; sandstone; physical changes; creep behavior; permeability

Address

Bo Hu, Sheng-Qi Yang and Wen-Ling Tian: State Key Laboratory for Geomechanics and Deep Underground Engineering, School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, P.R. China

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