Original Insights Into Rock Slope Damage Processes Until Collapse From Passive Seismic Monitoring
Abstract We performed a passive seismic monitoring of the La Praz ∼14,000 m3 unstable slope (French Alps) spanning over 10 years. During the last 6 months prior to collapse, we detected a clear 24% decrease in the slope's fundamental resonance frequency, f0, caused by a reduction in overall roc...
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| Format: | Article |
| Language: | English |
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Wiley
2024-07-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2024GL109139 |
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| author | P. Bottelin L. Baillet |
| author_facet | P. Bottelin L. Baillet |
| author_sort | P. Bottelin |
| collection | DOAJ |
| description | Abstract We performed a passive seismic monitoring of the La Praz ∼14,000 m3 unstable slope (French Alps) spanning over 10 years. During the last 6 months prior to collapse, we detected a clear 24% decrease in the slope's fundamental resonance frequency, f0, caused by a reduction in overall rock mass stiffness. The combined study of f0 and slope deformation suggested the alternating importance of sudden brittle failure processes versus more ductile phases with possible sliding. Seismic monitoring revealed slope damage that remained ambiguous or undetected with ground surface deformation monitoring, and highlighted critical periods with intense damage. Only some of these critical damage periods could be related to clear external forcing factors such as intense rainfall episodes. These new insights into rock slope's structural condition at depth represent an asset for future monitoring systems. Surface deformation and passive seismic stiffness tracking combined could reveal active slopes with ongoing damage processes. |
| format | Article |
| id | doaj-art-9732122b2d0a4d8d9b5d542ae87a2163 |
| institution | DOAJ |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2024-07-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-9732122b2d0a4d8d9b5d542ae87a21632025-08-20T03:12:51ZengWileyGeophysical Research Letters0094-82761944-80072024-07-015113n/an/a10.1029/2024GL109139Original Insights Into Rock Slope Damage Processes Until Collapse From Passive Seismic MonitoringP. Bottelin0L. Baillet1Société Alpine de Géotechnique (SAGE Ingénierie) Gières FranceISTerre Université Grenoble Alpes Université Savoie Mont Blanc CNRS IRD Université Gustave Eiffel Grenoble FranceAbstract We performed a passive seismic monitoring of the La Praz ∼14,000 m3 unstable slope (French Alps) spanning over 10 years. During the last 6 months prior to collapse, we detected a clear 24% decrease in the slope's fundamental resonance frequency, f0, caused by a reduction in overall rock mass stiffness. The combined study of f0 and slope deformation suggested the alternating importance of sudden brittle failure processes versus more ductile phases with possible sliding. Seismic monitoring revealed slope damage that remained ambiguous or undetected with ground surface deformation monitoring, and highlighted critical periods with intense damage. Only some of these critical damage periods could be related to clear external forcing factors such as intense rainfall episodes. These new insights into rock slope's structural condition at depth represent an asset for future monitoring systems. Surface deformation and passive seismic stiffness tracking combined could reveal active slopes with ongoing damage processes.https://doi.org/10.1029/2024GL109139passive seismic monitoringunstable rock sloperockfallslope damagingearly warning system |
| spellingShingle | P. Bottelin L. Baillet Original Insights Into Rock Slope Damage Processes Until Collapse From Passive Seismic Monitoring Geophysical Research Letters passive seismic monitoring unstable rock slope rockfall slope damaging early warning system |
| title | Original Insights Into Rock Slope Damage Processes Until Collapse From Passive Seismic Monitoring |
| title_full | Original Insights Into Rock Slope Damage Processes Until Collapse From Passive Seismic Monitoring |
| title_fullStr | Original Insights Into Rock Slope Damage Processes Until Collapse From Passive Seismic Monitoring |
| title_full_unstemmed | Original Insights Into Rock Slope Damage Processes Until Collapse From Passive Seismic Monitoring |
| title_short | Original Insights Into Rock Slope Damage Processes Until Collapse From Passive Seismic Monitoring |
| title_sort | original insights into rock slope damage processes until collapse from passive seismic monitoring |
| topic | passive seismic monitoring unstable rock slope rockfall slope damaging early warning system |
| url | https://doi.org/10.1029/2024GL109139 |
| work_keys_str_mv | AT pbottelin originalinsightsintorockslopedamageprocessesuntilcollapsefrompassiveseismicmonitoring AT lbaillet originalinsightsintorockslopedamageprocessesuntilcollapsefrompassiveseismicmonitoring |