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Ground collapses over abandoned mines constitute a significant geohazard in Korea. Recent collapses at the Mookeuk, Chungyang and Toehyun mines provide examples of the failures of rock over old stopes, and of old backfill that had been placed in abandoned stopes. Micro-seismic monitoring by borehole geophones is used to locate rockfalls within the Keumgok mine in order to design appropriate remedial...
On December 28, 2002 a landslide occurred on the eastern flank of Mt. Beni (Florence, Italy), on a slope where jointed basalts and ophiolitic breccias overlie Mesozoic limestones (Calcari a Calpionelle Formation). The collapse was preceded by several forewarning signals: the evolution of the slope deformation was the most important of them, and its analysis was the starting point for a risk scenario...
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