Modeling the dispersion of size reduction of rock during blast-induced failure of a rock mass surrounding an excavation
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The failure of the rock mass surrounding an excavation subjected to the detonation of powerful charges on its surface or in a neighboring outcrop is characterized by the formation of three zones in which the size reduction of the rock occurs: zone I-epicentral; zone II-frontal zone near the perimeter; and zone III-rear zone near the perimeter.
The dispersion of the size reduction of rock is virtually the same in the different zones, if there is no noticeable damping of the intensity of the blast waves in the mass.
The dispersion of the size reduction of rock in the failure zones depends heavily on the intensity of the dynamic load and the strength characteristics of the rock.
KeywordsRock Mass Excavation Size Reduction Blast Wave Failure Process
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