Under Water Blasting for Rock Dredging in Ports: Case Study of A Major Port

Abstract

A blast design for carrying out under water blasting for rock dredging, in ports for expansion, is discussed. The project adopted had three-phase methodology, which includes, pre-blast monitoring and planning, in-blast monitoring and post-blast analysis. The process involved acquiring borehole data of the area for assessing the geological condition of the rocks and gaining information about physico-mechanical properties. Structures in the port were surveyed to assess their condition for safe execution of the blasts. The proposed method helped in achieving optimum fragmentation and in protecting structure from the blast vibrations.