Characteristics of Peak Load on a Borehole Wall in Water-Coupling Blasting
Publication: Journal of Engineering Mechanics
Volume 149, Issue 1
Abstract
The peak load on a borehole wall is a key parameter in calculating the blasting failure range and in numerical simulations of nonfluid–structure coupling. In this study, the characteristics of the peak load in water-coupling blasting are studied theoretically and numerically. First, the interaction between a waterborne shock wave and a borehole wall is analyzed theoretically to reveal the main factors in the peak load on the borehole wall. Then, based on the theoretical calculations and the principle of dimensional homogeneity, a calculation model for the peak load is determined, and a numerical simulation of fluid–structure coupling is carried out to obtain the peak load under different conditions in two types of water-coupling blasting. The theoretical and numerical results are compared, and a correction coefficient is introduced to optimize the theoretical model. The results showed that the peak load increases approximately as a power function with increasing rock wave impedance and decreases approximately as a power function with increasing decoupling coefficient. Furthermore, it is concluded from statistical analysis that the correction coefficient is linearly proportional to the decoupling coefficient. In summary, a method for calculating the peak load on a borehole in water-coupling blasting is proposed, and it is verified against existing stress test data from water-coupling blasting.
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Data Availability Statement
All data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The authors thank the National Natural Science Foundation of China (Grant Nos. 51979205, 51939008, and 51779193) for the financial support.
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 149 • Issue 1 • January 2023
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Feb 14, 2022
Accepted: Sep 3, 2022
Published online: Nov 3, 2022
Published in print: Jan 1, 2023
Discussion open until: Apr 3, 2023
ASCE Technical Topics:
- Analysis (by type)
- Blasting effects
- Boring
- Construction engineering
- Construction methods
- Continuum mechanics
- Coupling
- Design (by type)
- Drilling
- Dynamics (solid mechanics)
- Engineering fundamentals
- Engineering mechanics
- Failure loads
- Load factors
- Models (by type)
- Numerical analysis
- Numerical models
- Solid mechanics
- Static loads
- Statics (mechanics)
- Structural design
- Structural dynamics
- Structural engineering
- Structural members
- Structural systems
- Walls
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