Abstract
The new method of rock breaking based on the combination of circular sawblade and conical pick was proposed to improve the effectiveness of hard rock breaking. The numerical simulation method was applied to research the conical pick cutting arc rock plate by ANSYS/LS‐DYNA. The conical pick cutting arc rock plate numerical simulation model was established to research the influence of arc rock plate structural parameters and cutting parameters on cracks formation and propagation of the arc rock plate and the cutting force in the process of conical pick cutting arc rock plate. The amount of cracks is positively correlated with arc rock plate thickness, the cutting speed, and distance of cutting point to arc rock plate central axis and negatively correlated with the cutting angle. The mean peak cutting force is positively correlated with the thickness of arc rock plate and the distance of cutting point to arc rock plate central axis; however, it is negatively correlated with the arc rock plate height and width and cutting angle of conical pick. The simulation results can be used to predict the conical pick work performance with various cutting parameters and structural parameters.
Highlights
Conclusion e finite element software ANSYS/LS-DYNA was used to research the cracks of arc rock plate forming in the process of conical pick cutting arc rock plate. e numerical simulation with ANSYS/LS-DYNA was established, selecting the JHC constitutive model as the arc rock plate material to simulate the mechanical changes and the arc rock plate cracks forming in the process of conical pick cutting arc rock plate. e number and shape of rock fragments formed were significantly associated with the width, height, thickness, distance of cutting point to arc rock plate central axis, and cutting angle of conical pick
E results of numerical simulation indicated that the mean peak cutting force is closely connected to the arc rock plate structural parameters and cutting parameters of conical plate. e mean peak cutting force decreases with the width and height increasing
While the width and height of the arc rock plate reach a certain value, the mean peak cutting force tends to a stable value
Summary
E contact type between the conical pick and arc rock plate model was defined as AUTOMATIC_GENERALE and ERODING_SURFACE_TO_SURFACE. In order to study the effect of arc rock plate structural parameters and cutting parameters on cutting performance accurately, the numerical simulation model was established with various cutting parameters and structural parameters of arc rock plate. C are the parameters of the material constitutive model, damage factor, normalized cohesive strength, normalized pressure hardening coefficient, pressure hardening coefficient, and strain rate hardening coefficient, respectively. E formula (3) describes the processing of material from plastic strain to fracture under continuous pressure P, Cutting head (conical picks)
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