Numerical Simulation and Experimental Study on Vibration-Decreasing Function of the Barrier Holes

Abstract:

The finite-element software ANSYS/LS-DYNA was used to study the influence of various parameters of barrier hole on the vibration-decreasing effect, such as the diameter, spacing, depth, hole number and row number of barrier holes and distance from blast holes to barrier holes. The simulation study indicates that: vibration-enhancing area and vibration-decreasing area exist together behind the barrier holes; various parameters of barrier holes can apparently affect the location, range and results of the vibration-enhancing area and the vibration-decreasing area; With bigger diameter, shorter distance, larger number and deeper barrier holes, the better vibration-decreasing results will come out; Under the conditions of numerical simulation in this paper, the effect of double-row barrier holes are better than that of single-row barrier holes, and the effect of vibration-decreasing of triangle layout form is almost the same as rectangle layout form of barrier holes; the changing distance between vibration barrier holes and blast holes will have a fluctuating effect on the vibration-decreasing effect, thus we should select the best location of vibration barrier holes based on the actual engineering conditions in practical engineering. The largest vibration-decreasing ratio of the barrier holes we have obtained at the test site is 33.3%, which is successfully utilized in the production explosion, so we have verified effectiveness of vibration-decreasing effect of the barrier holes.

• Periodical: Applied Mechanics and Materials (Volumes 602-605)
• Pages: 53-59
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.602-605.53
• Online since: August 2014
• Authors: Zhen Lei, Qiang Kang*, Ming Sheng Zhao, En An Chi
• Keywords: Barrier Holes, Blasting Vibration, Field Test, Numerical Simulation, Vibration Decreasing Ratio

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