Abstract
It was complicated and difficult for blasting vibration controlling when applying deep hole blasting in the ore body filled with filling method, especially when the two sides of the filling body was unstable. Take one lead-zinc mine engineering practice as case, the dynamic response dynamic response simulation numerical model of deep whole blasting was constructed by nonlinear dynamic software LS-DYNA, and five feasible side whole charge structures were proposed in order to analyse laws of explosive stress wave transmissed in filling body. The result shows that: “scaling” phenomenon did not occur in two sides of stope when tensile stress is less of dynamic tensile strength; blasting stress distribution tends to be more uniform when the air separation factor is 0.528; the speed and stress of blasting vibration reach the maximum value from pack center of the projection position of the filling body when blasting vibration velocity and stress are superimposed; the optimal blasting effect was getting when air interval as 1 meter. Field experiments show that, the effect of blasting vibration on the two-sides of fillings can be controlled by optimized edge-loading structure.
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