期刊
GEOSCIENCES
卷 10, 期 8, 页码 -出版社
MDPI
DOI: 10.3390/geosciences10080308
关键词
fragmentation; fragmental rockfall; real-scale test; block size distribution
资金
- Spanish Ministry of Economy and Competitiveness
- Agencia Estatal de Investigacion (AEI) [BIA2016-75668-P]
- European Regional Development Fund (ERDF/FEDER, UE) [BIA2016-75668-P]
Real-scale fragmentation tests provide high quality data in order to study the fragmentation pattern of rock blocks. In the tests carried out, the initial rock mass, in terms of both volume and shape, was reconstructed by means of 3D photogrammetry. The fragments size distribution of the bocks tested was measured by hand using a tape. The drop tests were performed in four different sites, releasing a total of 124 blocks and measuring 2907 fragments. The obtained fragment size distributions may be well fitted using power laws. The survival rate (Sr), which is the proportion of remaining block shows a wide range of values. Observing the fragment distribution, two parameters are needed to characterize the fragmentation: the number of fragments produced and Sr. The intensity of the fragmentation is expressed by the exponent of the fitted power laws. Although the results are highly variable and show a stochastic behavior of the fragmentation, we have identified different patterns that reflect some local test conditions.
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