{"id":16598,"date":"2025-02-24T14:44:17","date_gmt":"2025-02-24T17:44:17","guid":{"rendered":"https:\/\/www.fie.undef.edu.ar\/ceptm\/?p=16598"},"modified":"2025-02-24T14:44:17","modified_gmt":"2025-02-24T17:44:17","slug":"propagacion-de-grietas-y-obtencion-de-imagenes-de-grietas-internas-en-rocas-danadas-por-pre-compresion-bajo-carga-explosiva","status":"publish","type":"post","link":"https:\/\/www.fie.undef.edu.ar\/ceptm\/?p=16598","title":{"rendered":"Propagaci\u00f3n de grietas y obtenci\u00f3n de im\u00e1genes de grietas internas en rocas da\u00f1adas por pre-compresi\u00f3n bajo carga explosiva"},"content":{"rendered":"

Este estudio presenta un nuevo m\u00e9todo para analizar fracturas de rocas induciendo da\u00f1o aleatorio a trav\u00e9s de precompresi\u00f3n, en lugar de utilizar modelos de grietas prefabricados tradicionales. El m\u00e9todo implica la aplicaci\u00f3n de precompresi\u00f3n est\u00e1tica c\u00edclica de m\u00faltiples niveles para simular la distribuci\u00f3n aleatoria del da\u00f1o, combinada con im\u00e1genes de tomograf\u00eda computarizada (TC) de alta resoluci\u00f3n para la visualizaci\u00f3n tridimensional no destructiva de grietas internas. Un modelo te\u00f3rico que predice la propagaci\u00f3n de grietas inducidas por explosiones en arenisca da\u00f1ada se valida a trav\u00e9s de experimentos de laboratorio, tomograf\u00eda computarizada y simulaciones num\u00e9ricas, mostrando un margen de error de predicci\u00f3n inferior al 5%. Los hallazgos clave revelan una fuerte correlaci\u00f3n positiva entre los niveles de da\u00f1o de la arenisca y el rango de expansi\u00f3n de grietas inducidas por explosiones y dimensiones de cr\u00e1teres. El estudio destaca un mecanismo dual de “fracturaci\u00f3n sin\u00e9rgica por debilitamiento”, donde la red de grietas preexistente en rocas da\u00f1adas gu\u00eda los efectos del acu\u00f1amiento de gas. Estos resultados ofrecen fundamentos te\u00f3ricos y soporte t\u00e9cnico para optimizar los par\u00e1metros de voladura y mitigar los desastres din\u00e1micos en la ingenier\u00eda de t\u00faneles en condiciones geol\u00f3gicas complejas.<\/p>\n

\n

Abstract<\/strong><\/p>\n

This study investigates the dynamic crack propagation mechanism in damaged rocks under blasting excavation in complex geological conditions. A novel rock fracture analysis method based on pre-compression-induced random damage is proposed, overcoming the limitations of traditional prefabricated crack models. Innovatively, multi-level cyclic static pre-compression is applied to simulate the random damage distribution in engineering-scale rocks, combined with high-resolution computed tomography (CT) imaging to achieve non-destructive 3D visualization of internal crack morphologies under explosive loading. A theoretical model for predicting blast-induced crack propagation radius in damaged sandstone is established and validated through integrated laboratory blast experiments, CT scanning, and PFC-2D numerical simulations, demonstrating a prediction error margin below 5%. Key findings reveal a significant positive correlation between sandstone damage levels and the expansion range of blast-induced cracks as well as crater dimensions. The pre-existing crack network in damaged rocks effectively guides gas wedging effects, unveiling a \u201cweakening-synergistic fracturing\u201d dual mechanism. These results provide theoretical foundations and technical support for optimizing blasting parameters and mitigating dynamic disasters in tunnel engineering under complex geological settings.<\/p>\n

\"Descargar<\/a>Fuente: <\/strong>https:\/\/www.sciencedirect.com<\/em><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Este estudio presenta un nuevo m\u00e9todo para analizar fracturas de rocas induciendo da\u00f1o aleatorio a trav\u00e9s de precompresi\u00f3n, en lugar de utilizar modelos de grietas… <\/p>\n","protected":false},"author":1,"featured_media":16599,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[35,24],"tags":[],"_links":{"self":[{"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=\/wp\/v2\/posts\/16598"}],"collection":[{"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=16598"}],"version-history":[{"count":1,"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=\/wp\/v2\/posts\/16598\/revisions"}],"predecessor-version":[{"id":16601,"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=\/wp\/v2\/posts\/16598\/revisions\/16601"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=\/wp\/v2\/media\/16599"}],"wp:attachment":[{"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=16598"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=16598"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=16598"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}