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Erschienen in: Geotechnical and Geological Engineering 7/2022

16.04.2022 | Original Paper

The Influence of Bolt Density on Welded Wire Mesh Performance

verfasst von: Efstratios Karampinos, John Hadjigeorgiou

Erschienen in: Geotechnical and Geological Engineering | Ausgabe 7/2022

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Abstract

Rock reinforcement and surface support are typical components of ground support systems. Analytical design approaches tend to treat the ground support elements independently and do not explicitly consider the mechanical interaction between surface support and reinforcement. Empirical approaches consider their performance as a system, and do not provide guidance on the mechanical behaviour of the individual components. This paper focuses on gaining a better understanding of the reinforcement surface support interaction by combining the results from laboratory tests with advanced numerical modelling. A series of calibrated 3D distinct element method (DEM) models were constructed to emulate the mechanical behaviour of mesh in the laboratory. The developed 3D DEM models provided further insight into the impact of bolt spacing in diamond and square bolting patterns. Longer spacing between bolts provided a more ductile material response and lower load at initial wire failure. Modification to bolt spacing has a more significant influence on mesh displacement than load capacity. An increase in bolt spacing results in a substantially larger increase in the displacement when a square arrangement of bolts is used and a relatively larger load reduction when a diamond arrangement is used. Square patterns consistently provided a more ductile response with higher loading capacity at initial wire rupture than diamond patterns for the same bolt density. These results can be used in the design of rock bolting strategies under different ground conditions.

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Metadaten
Titel
The Influence of Bolt Density on Welded Wire Mesh Performance
verfasst von
Efstratios Karampinos
John Hadjigeorgiou
Publikationsdatum
16.04.2022
Verlag
Springer International Publishing
Erschienen in
Geotechnical and Geological Engineering / Ausgabe 7/2022
Print ISSN: 0960-3182
Elektronische ISSN: 1573-1529
DOI
https://doi.org/10.1007/s10706-022-02127-4

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