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Montserrat Mountain is located near Barcelona in Catalonia, in the northeast of Spain, and its massif is formed by conglomerate interleaved by siltstone/sandstone with steep slopes very prone to rockfalls. The increasing number of visitors in the monastery area, reaching 2.4 million per year, has highlighted the risk derived from rockfalls for this building area and also for the terrestrial accesses,...
This study uses ambient vibrations to monitor rock bolting works, the efficacy of which is usually difficult to estimate. The test site is a 760m3 unstable limestone column located in the Bourne valley (Vercors, France). The rock column's resonance frequencies (fX) were identified, corrected for reversible thermal effects and monitored over time. We observed clear increases in fX up to ~17% resulting...
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