Abstract
Ground vibration is one of the most critical undesirable factors of blasting. In this study, the effects of the blast damage factor and blast design parameters in a rock slope through applying the dynamic blast loading on ground vibration are investigated. Modelings were conducted considering three major geological discontinuities with a spacing of 15 m and a 45 degrees dip relative to slope face. A 3D discrete element code (3DEC Version 5.2) was used for this purpose. The pressure-decay function was used to simulate the dynamic pressure of detonation. Peak particle velocity (PPV) was selected as the main indicator to evaluate the effects of each one of these parameters by utilizing FISH programming language. Therefore, the PPV values were recorded continuously from the blast hole collar to the end of the model. The effects of rock mass quality (which is affected by the reduction in blast damage factor) and the parameters of hole diameter, burden, and spacing, stemming length, and blast delay time on the PPVs are investigated. The obtained results from numerical simulation indicated that the blast damage factor has a significant effect on ground vibrations. Moreover, it was also found that delay time is less effective than other blast design parameters on ground vibrations.
Published Version
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