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- W2392938009 abstract "Based on the non-linear finite-element procedure of LS-DYNA,the Johnson-Holmquist-Cook (JHC) model was adopted to investigate the damage evolution of the concrete near the blast hole in the cases of different charging structures and different air-decked ratios. The calculation results for three charging structures show that there is a gradual change from compression-shear failure to tensile failure with the increase of air-decked ratio and that different air-decked charging structures can be applied to different blasting purposes. For bench blasting,the highest utilization ratio of explosion energy belongs to the top air-decked charging structure. When the air-decked ratio reaches 40%,the failure mode of the concrete element changes from compression-shear failure to tensile failure in the middle of the blast hole. It is indicated that a certain reasonable air-decked ratio exists and it can be used to improve the utilization ratio of blasting energy. For presplitting blasting and smooth blasting,the best blasting effect belongs to the middle air-decked charging structure. Detonating manners can affect bench blasting more strongly than presplitting blasting and smooth blasting." @default.
- W2392938009 created "2016-06-24" @default.
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- W2392938009 date "2010-01-01" @default.
- W2392938009 modified "2023-09-25" @default.
- W2392938009 title "Blasting mechanism of air-decked charge in concrete medium" @default.
- W2392938009 hasPublicationYear "2010" @default.
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