In Dahongshan Copper-Iron Mine, the deposit consists of hard and tenacious ore/rock with well -developed joints which lead to poor fragmentation performance. In carrying out a research on blasting technology in the mine, types of explosives and related blasting parameters are determined based on a series of blasting crater experiments. The direction of burden is determined according to a survey on jointed fissures. As a result, the fragmentation performances are greatly enhanced, leading to reduced blasting cost, reduced occurrences of oversized boulders, and increased mining capacity.