Research on the Numerical Simulation of the Rock Blasting Effect of Different Charge Structures
In order to explore the blasting effect of different charge structures,different charge structure models are established by numerical simulation,and the crack propagation and stress distribution of fractured rock during blast-ing are analyzed.The results show that in the blasting of two different cartridge structures,due to the energy-gathering effect of the slotted cartridge,the largest force of blasting stress on the blast hole wall is at the slotted di-rection of slotted cartridge blasting,followed by ordinary blasting,and the smallest force is at the non-slotted direc-tion of slotted cartridge blasting.According to the rock fracture propagation diagram,slotted cartridge blasting is prior to ordinary cartridge blasting,forming a penetrating fracture,and the rock fracture distribution in ordinary car-tridge blasting extends approximately evenly from the center of the blast hole to surrounding areas,and the most ob-vious damage of the rock fracture in slotted cartridge blasting is at the slotted direction.Before the formation of the penetrating fracture of the model,the blasting stress of the slotted cartridge is greater than that of the ordinary car-tridge.After the fracture is penetrated,an effective pressure relief channel is formed,and the blasting stress of the or-dinary cartridge is higher than that of the slotted cartridge.
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