Numerical analysis of high bench blasting in open pit mine

Feasibility research of high bench blasting belongs to multiple factors and complex system project.In view of the feasibility research status of high bench blasting,a method of feasibility of high bench blasting considering blasting mechanism is put forward.Through comparing with difficult burst positions(bench top and bottom) stress field variation trend of the existing ordinary bench and high bench blasting process,it is found that the use of high bench blasting can obtain the existing bench blasting equivalent or better blasting results.From the blasting mechanism analysis,it is shown that the high bench blasting technology in the Barun ore is feasible.The numerical analysis results show that the best detonation mode of high bench blasting is all grain simultaneous blasting;the better ones are intermediate and ends of the detonation initiation;the unsuitable way is the hole bottom detonation.