Numerical Simulation Study on Parameter Optimization of Time Sequential Controlled Blasting

In order to reduce the damage of blasting to rock mass and improve the half-hole rate of presplitting blasting, the dynamic finite element analysis software ANSYS/LS-DYNA is used to simulate and analyze the action process of sequential controlled blasting. The effects of the detonation delay time of...

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Bibliographic Details
Published in:Shock and vibration 2022-02, Vol.2022, p.1-12
Main Authors: He, Meng, Hu, Yehong, Chen, Jin, Zhang, Jiazhao, Li, Helong, Cai, Changgeng
Format: Article
Language:English
Subjects:
Analysis
Blast holes
Blasting (explosive)
Boundary conditions
CAD
Computer aided design
Computer simulation
Costs
Delay time
Detonation
Drilling
Explosions
Field tests
Finite element method
Numerical analysis
Optimization
Parameters
Presplitting
Rock masses
Sequential control
Simulation
Simulation methods
Stress concentration
Tensile strength
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Summary:In order to reduce the damage of blasting to rock mass and improve the half-hole rate of presplitting blasting, the dynamic finite element analysis software ANSYS/LS-DYNA is used to simulate and analyze the action process of sequential controlled blasting. The effects of the detonation delay time of the postblasting hole and the hole spacing of the postblasting hole on the crack formation of the sequential controlled presplitting blasting are studied. The results show that when the blast hole with a diameter of 42 mm is used for sequential controlled presplitting blasting and the first blast hole pitch is 60 cm, the reasonable detonation delay time is 80∼120 μs. When the detonation delay time is 80 μs, the reasonable postblast hole spacing is 60 cm. Field tests show that when reasonable optimized blasting parameters are used, presplit blasting with sequential control can reduce drilling workload and explosive consumption. The sequential controlled presplitting blasting not only increases the hole spacing but also plays a better role in protecting the surrounding rock.
ISSN:1070-9622
1875-9203
DOI:10.1155/2022/8728953