Empirical estimation of the uniaxial compressive strength from the point load test in anisotropic rocks (schists and shales)
In this paper new empirical relationships are developed between uniaxial compressive strength and point load index Is(50) in anisotropic rocks, particularly in schists and shales. We have used data from 2015 point load tests and 229 uniaxial compressive strength tests performed in anisotropic rocks...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2016 |
| País: | Ecuador |
| Institución: | Universidad Central del Ecuador |
| Repositorio: | Revista FIGEMPA: Investigación y Desarrollo |
| Idioma: | español |
| OAI Identifier: | oai:revistadigital.uce.edu.ec:article/862 |
| Acceso en línea: | https://revistadigital.uce.edu.ec/index.php/RevFIG/article/view/862 |
| Access Level: | acceso abierto |
| Palabra clave: | anisotropía ensayo de carga puntual esquisto mecánica de rocas resistencia a compresión uniaxial anisotropy point load test uniaxial compressive strength rock mechanics schists |
| Sumario: | In this paper new empirical relationships are developed between uniaxial compressive strength and point load index Is(50) in anisotropic rocks, particularly in schists and shales. We have used data from 2015 point load tests and 229 uniaxial compressive strength tests performed in anisotropic rocks obtained during various stages of study of Paute-Cardenillo hydroelectric project, located in the eastern slopes of the northern Andes Cordillera (SE Ecuador). We have defined five anisotropic rocks types (schists and shales) for which the mean values of uniaxial compressive strength and point load index were obtained according to their orientation with respect to the planes of anisotropy. Finally, it is found that there is no direct relationship between uniaxial compressive strength and Is(50) so it is unreliable take traditional empirical linear regression models, which do not consider the effect of the planes of anisotropy in rock strength. Therefore, three new empirical relationships that estimate the uniaxial compressive strength from Is(50) in anisotropic rocks are proposed. |
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