A Research on Blasting Parameters of Medium Diameter Deep Hole Mining Technology at the Experimental Mining Site in a Tungsten Mine
In order to reasonably determine the blasting parameters of the medium diameter deep hole mining method in a tungsten mine,we are basing on the blasting funnel theory and blasting similarity theory.The on-site blasting funnel tests were conducted on single hole series,multi hole same section and inclined bench.The optimal blasting funnel radius was 0.66m,the optimal hole spacing was 1.0～1.2 m and the minimum resistance line was 0.9～1.19 m.The recommended parameters for medium diameter deep hole blasting are row spacing of 2.4 m,hole bottom spacing of 2.5～3.0 m and charge density of 4.9 kg/m.Using the recommended blasting parameters to conduct industrial experiments on medium diameter deep hole mining,it was found that the unit explosive consumption of the medium diameter deep hole test stope was reduced by 18％compared to the original mining method.The mining cost was reduced by 21％.It indicates that the blasting funnel test and deep hole mining industrial test are successful.We are using the shallow hole blasting funnel test method to determine the parameters of medium diameter deep hole blasting,it is reasonable.We think it can provide reference for the optimization research of blasting process parameters in other mines.
Medium diameter deep hole mining methodBlasting parametersBlasting funnel theoryBlasting funnel testIndustrial trials
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