Abstract: Although the digital detonator has many advantages over the conventional electrondelay detonator, the application of the digital detonator on the blasting excavation of the rock slope is rarely reported. In this study, a high rock slope was planned to be excavated at the HeBai Expressway between stations K41+016 and K41+273 and the digital detonator was used in the excavation of the slope. Due to the presence of building structures adjacent to proposed slope to be excavated, a trail study was carried out for providing the design blasting parameters. According to the field measurement of vibration velocity, the maximum tested vibration velocity of the adjacent building was 0.87 cm/s, which was much lower than the controlling threshold of 2 cm/s, indicated that the safety of the adjacent buildings during blasting excavation could be warranted.

Key words: Digital Detonator, Blasting Excavation, Rock Slope, Adjacent Buildings