Abstract: According to blasting energy balance theory by Livingston, single hole series, multi hole and the same delay time, inclined bench site blasting crater experiments were done at a mine. Some blasting parameters, such as unit explosive consumption, burden in directional blasting, bottom hole distance of medium-deep hole sub room stage delayed filling method mining of this iron ore, were confirmed. It provides design basis for industrial tests and subsequent productivity.

Key words: Blasting crater experiment, Medium-deep hole, Blasting parameters