ABSTRACT
Blasting is a relatively economical and efficient excavation method compared to other methods such as mechanical excavation. However, when tunnel sites are located near residential areas, the charge weight is often reduced to limit the impacts of vibration and noise. This makes it difficult to maintain the scheduled excavation advance rate. In recent years, however, advanced blasting technologies such as computerized jumbos and high-accuracy electronic detonators have allowed better control over tunnel blasting vibrations. Additionally, new vibration measurement systems have been introduced that enable the simultaneous monitoring and analysis of blast vibration results. Here, we applied these advanced technologies in a restricted blasting zone to reduce the environmental impact and enable the excavation advance rate to be maintained.
