期刊
SIMULATION MODELLING PRACTICE AND THEORY
卷 130, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.simpat.2023.102854
关键词
Drill and blast method; Numerical simulation; RHT constitutive model; Blasting parameters; Field test
This study investigated the performance of three constitutive models for rock material in simulation of blast-induced rock cracks, and proposed an optimal blasting parameters design.
Overbreak induced by drill and blast method occurs during rock tunnelling. In this study, the performance of three constitutive models for rock material (Riedel-Hienmaier-Thoma, HomlquistJohnson-Cook, and plastic kinematic models) in simulation of blast-induced rock cracks was investigated, to improve the accuracy of the numerical simulation. The results indicate that the two conventional blast-induced crack simulation methods in LS-DYNA have certain limitations. In contrast, the Riedel-Hienmaier-Thoma (RHT) model characterise the tensile failure behaviour and dynamic fracturing process in rock blasting. Several numerical simulations were performed to quantify the optimal blasting parameters based on the engineering background. An optimal blasting parameters design was proposed and compared with the original blasting parameters. The outcome of the field test demonstrated the feasibility of the optimal blasting parameters.
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