Optimization of Blasting Parameters at Parts of Difficult Explosion in East End Slope of East Stope in Baiyunebo Iron Mine

According to the present situations of side slope at the end of East Stope in Baiyunebo Iron Mine,the joints were investigated and counted with the scan line method,which provided important references for designing the detonating network and selecting the initiation direction.The theoretical calculation and the blasting tests at field are combined organically.Furthermore,the theoretical results of determining parameter calculations with the tests based on the lithology of East Stope in Baiyunebo Iron Mine could directly guide the establishment of blasting schemes at field such as the initiation direction is determined by the dominant orientation of fracture as well as the determination of initiation position for charge in the hole and the ultra-deep bottom of steps are to improve the end effects of cylindrical charge.In this paper,the blasting quality and production efficiencies are improved by optimizing the blasting parameters and blasting delay as well as changing the initiation direction.