Understanding strength, deformability, stress state and rock breakage
Keywords:
Failure Criteria, Unconfined Compressive Strength, Rock Deformability, Elastic Modulus, Tensile StrengthAbstract
This paper introduces a new failure criterion for rocks, addressing the limitations of traditional unconfined compressive strength (UCS) testing and its associated parameters. Our research explores the mechanisms of rock breakage under compressive loads, highlighting the formation of tension fractures and the significant role of friction in stress distribution. We propose a revised interpretation of the stress-strain curve and emphasize the need for direct tensile testing to achieve more precise measurements of tensile strength and elastic modulus. By presenting a novel failure criterion that accounts for these factors, this study aims to enhance the reliability of rock strength assessments, ultimately improving the safety and stability of underground engineering projects.
References
Zhang, Y., & Yu, D. (2019). Comparative study on the test method for tensile elastic modulus of rock materials. Advances in Civil Engineering, 2019.