Experimental and Numerical Simulation Study on the Influence of Bedding Angle on the Blasting Effect of Slotted Charges

ABSTRACT Over the years, the directional fracture control blasting technology using slotted charges has been widely applied in the formation control around rock tunnels. This article employs CT scanning technology and numerical simulation methods to investigate the influence of bedding angle on the blasting fracture effect in layered rock masses under different bedding strengths. The results indicate that in layered rock masses with strong bedding bond strength, the slotted charge still exhibits good directional fracture effects. The angle of strong bedding significantly affects the propagation of the explosive stress wave from the slotted charge, thereby influencing the overall damage of the specimen. Changes in the angle of the strong bedding plane have a certain impact on the expansion trajectory of the main blasting crack. As the inclination angle of the weak bedding plane increases, the influence of the weak bedding plane on the crack propagation behavior gradually increases.