Coupled thermal-mechanical behavior of slate and its anisotropic failure criterion
Journal
58th US Rock Mechanics / Geomechanics Symposium 2024, ARMA 2024
Start Page
ARMA 24-0158
ISBN (of the container)
9798331305086
Date Issued
2024
Author(s)
Abstract
This study investigates the thermal-mechanical behavior of slates in geothermal reservoirs and establishes an anisotropic thermal-mechanical coupling failure criterion. Slate samples obtained from a geothermal site were subjected to a series of direct-shear and triaxial-compression tests at various confining pressures and temperatures. The results showed that the orientation angle within a specific range caused shear sliding failure of the slate, primarily due to foliation strength; beyond this range, intrinsic rock properties led to different failure modes. Elevated temperatures significantly diminished the intrinsic strength of the slate in a specific range of orientation angles. These findings provided a foundation for the development of an anisotropic thermal-mechanical coupling failure criterion. The validity of the proposed criterion, which incorporates both the orientation angle and thermal degradation effects, was demonstrated through experimental results. This study enhances the understanding of the thermal-mechanical behavior of these materials in geothermal reservoirs. Copyright 2024 ARMA, American Rock Mechanics Association.
Event(s)
58th US Rock Mechanics / Geomechanics Symposium 2024, ARMA 2024
Publisher
American Rock Mechanics Association (ARMA)
Description
58th US Rock Mechanics / Geomechanics Symposium 2024, ARMA 2024, 23 June 2024 through 26 June 2024, Golden
Type
conference paper