Version 1
: Received: 2 April 2024 / Approved: 2 April 2024 / Online: 2 April 2024 (10:26:04 CEST)
How to cite:
Marulanda, L.; Vallejos, J.; Velásquez, J. Explicit Numerical Study on Dynamic Behavior of Threadbar under Impact Loading. Preprints2024, 2024040192. https://doi.org/10.20944/preprints202404.0192.v1
Marulanda, L.; Vallejos, J.; Velásquez, J. Explicit Numerical Study on Dynamic Behavior of Threadbar under Impact Loading. Preprints 2024, 2024040192. https://doi.org/10.20944/preprints202404.0192.v1
Marulanda, L.; Vallejos, J.; Velásquez, J. Explicit Numerical Study on Dynamic Behavior of Threadbar under Impact Loading. Preprints2024, 2024040192. https://doi.org/10.20944/preprints202404.0192.v1
APA Style
Marulanda, L., Vallejos, J., & Velásquez, J. (2024). Explicit Numerical Study on Dynamic Behavior of Threadbar under Impact Loading. Preprints. https://doi.org/10.20944/preprints202404.0192.v1
Chicago/Turabian Style
Marulanda, L., J.A. Vallejos and J.I. Velásquez. 2024 "Explicit Numerical Study on Dynamic Behavior of Threadbar under Impact Loading" Preprints. https://doi.org/10.20944/preprints202404.0192.v1
Abstract
Due to the continued deepening of today’s mining projects, there is a need to develop new or improved rockbolts that are strong and yielding and have high energy absorption when exposed to dynamic loading. Impact tests can provide useful information about the dynamic response of rockbolts but most laboratory tests involve high costs in preparation and result validation. Numerical modeling is an alternative that, in addition to complementing laboratory results, can be used to represent the process of deformation and energy absorption of support elements. In this paper the implementation and results obtained from a finite difference (FDM) numerical model are presented. The model functions as a simulation tool to illuminate all the elements that conform the large-scale (1:1) impact test and their behavior and influence on the dynamic response of a threadbar bolt (22 mm nominal diameter). The model was calibrated using published results and based on these results as well as parametric analysis, the response of each component (steel tube, grout, and bolt) could be identified and its behavior in terms of absorbed energy and displacement could be observed. Results show the model can provide important preliminary information to make design decisions about support elements design.
Keywords
Rockbursts; Threadbar; Dynamic testing; Numerical modelling; energy absorption
Subject
Engineering, Mining and Mineral Processing
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
