Experimental and numerical simulation calculation of spherical target explosion concrete throwing

In order to study the effect of blasting parameters on the throwing of crushed stone in engineering blasting, an experimental system for the throwing of spherical target explosive concrete based on digital high-speed image acquisition system was designed, and the experiments on the throwing of concrete under the condition of single-hole and three-hole charge were carried out, and the failure modes and throwing quality of spherical target after blasting under the condition of single-hole and three-hole charge were compared. The simulation model of spherical target explosion is established, and the accuracy of the model is verified by experiments. The concrete throwing characteristics of different explosive holes and different spherical target strength are simulated and calculated. The results show that when the quantity of explosive is 5g, the mass of the three holes is 89% more than that of the single hole explosive; when the quantity of explosive is 10g, the mass of the three holes is 82.1% more than that of the single hole explosive; when the quantity of explosive is constant, increasing the quantity of the holes can effectively improve the quality of the throwing concrete and the area of the blasting pit, which is helpful to improve the production efficiency and reduce the cost. The simulation results are in good agreement with the experimental data.