Open Access

ARTICLE

2D Numerical Simulation of Blasting Crater and Breaking Fragmentations

Jingao Wu^1,2, Yong Fan^1,2,*, Zhendong Leng^1,3, Guangdong Yang^1,2

1 Hubei Key Laboratory of Construction and Management in Hydropower Engineering, China Three Gorges University, Yichang, 443002, China
2 College of Hydraulic & Environmental Engineering, China Three Gorges University, Yichang, 443002, China
3 China Gezhouba Group Explosive Co. Ltd., Chongqing, 401121, China

* Corresponding Author: Yong Fan. Email:

Computer Modeling in Engineering & Sciences 2025, 144(1), 811-839. https://doi.org/10.32604/cmes.2025.065632

Received 18 March 2025; Accepted 03 June 2025; Issue published 31 July 2025

Abstract

The formation process of blasting craters and blasting fragments is simulated using the continuum-discontinuum element method (CDEM), providing a reference for blasting engineering design. The calculation model of the blasting funnel is established, and the formation and fragmentation effect of the blasting crater under different explosive burial depths and different explosive package masses are numerically simulated. The propagation law of the explosion stress wave and the formation mechanism of the blasting crater are studied, and the relationship between the rock-crushing effect and blasting design parameters is quantitatively evaluated. Comparing the results of numerical simulation with the results of field tests and theoretical calculations indicated that the three are consistent, which proves the accuracy of numerical simulation. The results showed that the area of the blasting crater rises with the increase of explosive package mass and explosive burial depth. Taking the proportion of broken blocks with particle size ranging from 0.01 to 0.1 m as the research object, it can be found that the proportion of broken blocks with an explosive burial depth of 0.62 to 1.12 m is 0.45 to 0.18 times that with an explosive burial depth of 0.5 m. The proportion of broken blocks with an explosive radius of 4 to 12 cm is 1.14 to 3.29 times that with an explosive radius of 2 cm. The quantitative analysis of the blasting effect and blasting design parameters provides guidance for the design of blasting engineering.

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Keywords

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