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Control of dynamic failure of brittle rock using expansive mortar
https://orcid.org/http://orcid.org/0000-0002-5866-7858
Control of rock failure under stress wave loading is challenging but important to mitigate the negative impacts of underground excavation on the environment (e.g., rock overbreak and ground vibration). This study reports that dynamically amplified expansion pressure from expansive mortar is an effective and efficient solution to promote the dynamic failure of brittle rock. Our experimental and numerical results reveal that the expansion pressure amplified by stress wave loading facilitates the dynamic failure surrounding the expansive mortar, accompanied by the generation of tangential and radial cracks and the attenuation of stress wave. Our data also show that the dynamically amplified expansion pressure is larger than the radial inertia stress and dominates crack generation in the unconfined rock, but the pressurization capacity of expansive mortar should be improved for the rock fracturing application in confined rock. The application of expansive mortar fundamentally modifies the brittleness of surrounding rock under stress wave loading, resulting in changes in failure mode. However, the application of expansive mortar to control rock dynamic failure should be further investigated in field studies.
Control of dynamic failure of brittle rock using expansive mortar
https://orcid.org/http://orcid.org/0000-0002-5866-7858
Control of rock failure under stress wave loading is challenging but important to mitigate the negative impacts of underground excavation on the environment (e.g., rock overbreak and ground vibration). This study reports that dynamically amplified expansion pressure from expansive mortar is an effective and efficient solution to promote the dynamic failure of brittle rock. Our experimental and numerical results reveal that the expansion pressure amplified by stress wave loading facilitates the dynamic failure surrounding the expansive mortar, accompanied by the generation of tangential and radial cracks and the attenuation of stress wave. Our data also show that the dynamically amplified expansion pressure is larger than the radial inertia stress and dominates crack generation in the unconfined rock, but the pressurization capacity of expansive mortar should be improved for the rock fracturing application in confined rock. The application of expansive mortar fundamentally modifies the brittleness of surrounding rock under stress wave loading, resulting in changes in failure mode. However, the application of expansive mortar to control rock dynamic failure should be further investigated in field studies.
Control of dynamic failure of brittle rock using expansive mortar
https://orcid.org/http://orcid.org/0000-0002-5866-7858
Control of rock failure under stress wave loading is challenging but important to mitigate the negative impacts of underground excavation on the environment (e.g., rock overbreak and ground vibration). This study reports that dynamically amplified expansion pressure from expansive mortar is an effective and efficient solution to promote the dynamic failure of brittle rock. Our experimental and numerical results reveal that the expansion pressure amplified by stress wave loading facilitates the dynamic failure surrounding the expansive mortar, accompanied by the generation of tangential and radial cracks and the attenuation of stress wave. Our data also show that the dynamically amplified expansion pressure is larger than the radial inertia stress and dominates crack generation in the unconfined rock, but the pressurization capacity of expansive mortar should be improved for the rock fracturing application in confined rock. The application of expansive mortar fundamentally modifies the brittleness of surrounding rock under stress wave loading, resulting in changes in failure mode. However, the application of expansive mortar to control rock dynamic failure should be further investigated in field studies.
Control of dynamic failure of brittle rock using expansive mortar
Acta Geotech.
Wang, Lu (author) / Wei, Mingdong (author) / Wu, Wei (author)
Acta Geotechnica ; 17 ; 5829-5839
2022-12-01
11 pages
Article (Journal)
Electronic Resource
English
Control of dynamic failure of brittle rock using expansive mortar
| Springer Verlag | 2022
| TIBKAT | 1967
Brittle Ductile Failure Mechanics of Mortar and Concrete
| NTIS | 1991
Modelling brittle failure of rock
| British Library Conference Proceedings | 2000
Localized Failure in Brittle Rock
| Wiley | 2013