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Showing 1 to 14 of 14 for “"rockfalls"”.
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Investigation of factors governing the stability of stope panels in hard rock mines in order to define a suitable design methodology for shallow mining operations
… panels in shallow mines manifests itself as rockfalls from the hangingwall. Rockfalls from unstable stope panels vary in size from rockfalls between support units, to rockfalls spanning between pillars or solid abutments, to rockfalls bridging several panels and pillars. A suitable and …
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Investigating the Occurrence and Effects of Fragmentation: Analysis of Rockfall Videos Captured During Slope Maintenance Campaigns
… steep slopes and slopes with trees. Compact rockfalls fragmented less often than rockfall of any other initial shape. The rockfall, primary and secondary fragment shapes all seem to be influenced by the rock type, and the fragment shapes influenced by the initial rockfall shape. Most …
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Understanding the nuances of the rockfall frequency-magnitude relationship: review and examples from two original case studies in Glenwood Canyon, CO, USA
… relationship is important for understanding rockfalls as a geomorphic agent and as a key mass-wasting hazard. The relationship is frequently modeled with a power law fit to frequency vs. volume, and the power law provides a basis for extrapolating recurrence intervals and quantifying cliff …
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An Assessment of Rockfall Triggers and Seasonal Weather Trends Through An Examination of Railway Slope Management Procedures
Rockfalls are one of the many geohazards that impact railways across Canada with the potential to cause operational delays, damage to infrastructure and the environment, and injury or loss of life. To minimize the risk associated with these scenarios, railways rely on slope management systems that …
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A study on slope instability above Chapman's Peak Drive, Cape Peninsula, South Africa
… their summit. A seemingly increased frequency of rockfalls and the death of a young woman in December 1999 led to the closing of the Drive as a public thoroughfare. At the beginning of the year 2000 Chapman's Peak Drive featured in both local and international media because of the wildfires that …
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A New Tool for Rock Mass Discontinuity Mapping from Digital Images: VTtrace
… this task could minimize human exposure to rockfalls, rockbursts or instabilities and facilitate the use of new methods of data visualization such as virtual environments. This research was undertaken to develop VTtrace; a semi-automatic fracture mapping algorithm based on image processing …
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Evaluation of strata conditions and performance of support systems of the Emerald Shaft Gold Mine in Gauteng Province of South Africa
… The study also identified areas prone to rockfalls, fall of ground incidents, and stope instability, emphasizing the need for robust support design and regular monitoring. The study concluded that a tailored support design approach, considering tendon performance, ground conditions, and …
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Design Optimization of Safety Benches for Surface Quarries through Rockfall Testing and Evaluation
… benches with a 4 ft berm will hold over 95% of rockfalls, a design supported by the field testing. Conducting site-specific rockfall testing is also recommended to obtain realistic input parameters for the simulations and to provide design justification to regulatory agencies.
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The development of an interactive computer model for managing geologic hazard databases
… The incident made all parties aware that rockfalls from aging highway roadcuts within the city limits pose some threat to the motoring public (Watts et al., 1996). Additionally, in June 1995, the Timberlake dam in Lynchburg, VA, failed due to flash flooding from intense summer storms. Two …
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Planetary Seismology using Single-Station and Small-Aperture Arrays: Implications for Mars and Ocean Worlds
… from moulins, drainage events, icequakes, and rockfalls. Both sites had very high frequency events (> 100 Hz) that came from poles left in the field. These studies inform landing site selection criteria, such that there were trades between detecting local seismicity at the expense of seeing …
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Abbandono del territorio e dissesto idrogeologico in Appennino bolognese: analisi delle dinamiche e degli interventi di gestione idraulico-forestale
… occurrence of clays. Therefore landslides and rockfalls are very frequent, while surface soil erosion is generally low and anyway concentrated in the low Apennine, where intensive farming is still economically worth. The study, supported by GIS use, analyses the main fisical characteristics of …
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Development of an early warning system for predicting rock bursts and rock induced displacements in seismically active mining blocks at Mufulira underground mine (deeps section).
… to enhance accuracy in picking up rockbursts and rockfalls. Geomechanics properties of rocks determined in the laboratory experiments, geotechnical and geological mapping results were used to suitably place the geophones in suitable proximities within the seismically affected mining blocks. This …
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Advancing Rockfall Hazard Assessment through Data-Driven Modelling Based on Laboratory-Scale Experiments
Understanding the dynamics of rockfalls is critical for predicting hazards and mitigating risks in both natural and engineered environments. This research investigates the relationship between rock shape, release angle, and rockfall behavior, combining experimental analysis with machine learning …
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A study of the seismic behaviour of geomorphological features using ambient noise measurements
… by lateral spreading, rock sliding and rockfalls. The characteristic lithology of the area, i.e. a layer of compact Coralline Limestone overlying a layer of clays, gives rise to a ubiquitous resonance peak between 1 - 2 Hz, which is observed both on stable areas as well on unstable …