The Numerical Simulation and Optimization of the Pre-Splitting Crack’s Length in Underground Deep Hole Blasting

Abstract:

The length of the pre-splitting crack is an important parameter in underground mine deep-hole blasting, and experience and engineering analogy methods are used commonly, but they seldom have scientific and theoretical basis. In this paper, the mature numerical analysis software — ANSYS/LS-DYNA was adopted, the different lengths of pre-splitting crack were simulated. In the filling body, the corresponding maximum blasting vibration velocity and stress are obtained by numerical simulation when the maximum initiation section blasted. The corresponding regression formulas are obtained by using the least square method, and the optimal length of the pre-splitting crack is 12 m through the calculation. Proved by practice, this method to get the length of the pre-splitting crack is scientific and effective, can be extended in other similar blasting engineering.

• Periodical: Applied Mechanics and Materials (Volumes 268-270)
• Pages: 717-720
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.268-270.717
• Online since: December 2012
• Authors: Fu Liang Jiang, Yu Sheng, Xiang Yang Li, Mei Qiong Xia, Jing Zhan
• Keywords: Deep-Hole Blasting, Least-Square Method (LSM), Numerical Simulation, Pre-Splitting Crack, Underground Mine

References

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DOI: 10.1016/j.ijrmms.2007.12.002