Study on Effect of Blasting Dust Suppression with Water-bearing Interval Charge in Open-pit Mine
In order to reduce the amount of dust produced by blasting operation from the source,the dust suppression effect of water interval blasting is discussed by studying the production mechanism of blast-ing dust,its particle size distribution and dispersion law,and combining with the theory of hole stress change under water condition.Based on an open pit mine as the background,a reasonable test and monitor-ing scheme was established,four blasting zones with different charge structures were set up,and dust con-centration changes at different time and center distance were monitored after blasting.Data were analyzed ac-cording to the pollution point source diffusion equation,and dust suppression effects of different charge structures under water,no water and water conditions were compared.The results show that the dust concen-tration in the blasting area with water column is about 50%lower than that in the dry blasting area.When the water column is located at the top and bottom of the hole,the dust removal effect is the most obvious,and the dust intensity is about 57%of that in the dry hole.
NETL
NSTL
万方数据
维普
