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Updated: Sep 9, 2025
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Stress Distribution During Cold Compression of Rocks and Mineral Aggregates Using Synchrotron-based X-Ray Diffraction
Published on: May 20, 2018
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Estudio sobre las características de falla y la susceptibilidad a la fractura de la roca circundante bajo verdadera
Chongyan Liu1, Cheng Pan2,3, Guangming Zhao1
1Key Laboratory of Safe and Effective Coal Mining, Ministry of Education of China, Anhui University of Science and Technology, Huainan 232001, China.
ACS omega
|September 2, 2025
Resumen
Este estudio revela cómo se propagan las grietas en la arenisca bajo estrés, identificando cuatro fases de falla. El estrés in situ es el principal factor que influye en la rotura de rocas y la estabilidad de la vía.
Área de la Ciencia:
- Ingeniería geotécnica
- Mecánica de las rocas
- Ciencias de los materiales
Sus antecedentes:
- La comprensión de los mecanismos de falla de roca es crucial para excavaciones subterráneas seguras y estables.
- Los defectos preexistentes influyen significativamente en el comportamiento mecánico de las masas rocosas.
Objetivo del estudio:
- Investigar el comportamiento de falla y los mecanismos de agrietamiento en la arenisca con defectos preexistentes.
- Desarrollar un modelo de propagación de fracturas para evaluar la susceptibilidad de falla de la roca circundante.
- Para aclarar la formación de cráteres en forma de V en las rocas circundantes.
Principales métodos:
- Pruebas de compresión triaxial verdadera en muestras de arenisca con imágenes digitales.
- Análisis de la propagación de las microfracturas bajo concentración de tensión.
- Implementación de un modelo de propagación de la fractura.
- Análisis macroscópico de las fases de fallo y de los factores que influyen.
Principales resultados:
- Se identificaron cuatro fases de falla distintas: quiescencia, eyección de partículas, daño estable y colapso estructural.
- La capacidad de carga se correlaciona positivamente con la tensión in situ; la capacidad de deformación muestra un comportamiento no monótono.
- Orden de sensibilidad para los factores que influyen en el fallo: tensión in situ > ángulo de grieta > tamaño de grieta > coeficiente de fricción.
- La fuerza de compresión crítica explica la formación del cráter de falla en forma de V.
Conclusiones:
- El estrés in situ es el factor más crítico que influye en la ruptura de la roca circundante.
- Los resultados proporcionan información para el diseño de estrategias eficaces de control de la estabilidad de la vía.
- Comprender la propagación de grietas y las fases de fallo es clave para predecir y prevenir fallas catastróficas de roca.
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