In order to reduce the ore bulk ratio,the design is more reasonable and more in line with the blasting parameters of the medium and deep holes in the mountain in front of you.Combined with the actual situation of the mine in front of us,the main reasons for the large block rate of deep hole blasting in the mountain in front of us were analyzed.It is proposed to use the delayed blasting of sector holes to reduce the block rate;And by means of spaced charges,the utilization efficiency of explosives is improved,thereby reducing the production of large blocks.The use of fan-shaped hole delay blasting method,while improving the charge structure,can effectively reduce the bulk rate and reduce the generation of blasting block.Good results have been achieved in practice,reducing the problem of bulk rate of metal ore.
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