Abstract: The blasting parameters affect the blast quality and production cost and thus, can directly influence the mine production and safety. In view of the blasting problems in Waitoushan Iron Mine such as high large fragment rate and large toe which seriously affect the loading efficiency, the research on the rock Blastability is made. Several physicomechanical properties that can affect the blasting effect are tested on 14 representative ore-rock samples and their blastability is classified into easy-, medium- and difficult-to- blast groups using the calculation equation for blastability classification indexes and according to the classification exponent distribution, thus providing an important theoretical basis for the standardization of the blasting parameters and process.

Key words: Open-pit mine, Rock property, Blastability classification