Comparison of truss bridge structures designed for conveyor belt systems

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Abstract

In open-pit mines, the installation of conveyor belt tracks may require conveyor bridges to span the terrain or existing structures. The paper compares the structural design options for truss bridge structures, with a particular focus on existing, recycled structures and prefabricated, modular elements. Three-dimensional finite element simulations were used to verify the first option, which is an existing structure meant for reuse to look at the natural frequencies, stress distributions, and deformed shapes. These results highlight the importance of investigating the vibrations caused by the movement of the conveyor belt and the wear of the rollers. The other option examined is a commercial solution based on a Bailey bridge, which is a portable, prefabricated, modular truss bridge designed for quick assembly without heavy equipment. The advantage of the modular design is that the structure can be reinforced by combining the elements, thereby increasing operational safety and economy.