Abstract:

Abstract: The temperatures is often -30-40℃ in the winter. The winter is lasting five months in Wunugetu Mountain. The large rocks that generated of upper permafrost layer impact loading efficiency and cause accident.In ore area,the large rocks are easy to plug the Gyratory crusher. Seriously, it is to cause shutdown. Experiments of blasting funnel and frozen soil blasting parameters were stuied on the characteristics of soil frozen layer and economic benefits were analyzed .

Key words: Key words:permafrost blasting, blasting crater, scaled depth of charge, auxiliary hole