Experimental Study on the Performance of Different Meshes Under Quasi-Static Loading

• Published in: Rock mechanics and rock engineering Vol. 55; no. 1; pp. 249 - 258
• Main Authors: Kang, Hongpu, Yuan, Guiyang, Gao, Fuqiang, Lou, Jinfu
• Format: Journal Article
• Language: English
• Published: Vienna Springer Vienna 2022; Springer Nature B.V
• Subjects: Bearing capacity; Civil Engineering; Deformation; Diamonds; Earth and Environmental Science; Earth Sciences; Failure mechanisms; Geophysics/Geodesy; Mechanical properties; Original Paper; Peak load; Roads; Rock bolts; Steel; Stiffness; Welding; Wire; Wire cloth; Mechanical behavior; Surface support; Ground support; Experiment
• ISSN: 0723-2632; 1434-453X
• DOI: 10.1007/s00603-021-02651-4

Understanding the performance and failure mechanisms of surface support in mine roadways is paramount to the success of mine productivity. A sophisticated facility has been developed to evaluate the mechanical behavior of surface support under quasi-static loading. Three different types of mesh, welded wire mesh, chain-link mesh, and geogrid mesh are tested in conjunction with different surface components including rock bolt plate, steel strap and W-strap. It is found that the welded wire mesh has the higher stiffness and load-bearing capacity than the diamond mesh and the geogrid mesh. For each mesh, the incorporation of steel strap or W-strap helps the load to distribute more uniformly to more wires than just adopting bearing plate alone, leading to a substantial improvement in both the stiffness and the load-bearing capacity. The welded wire mesh can still withstand large deformation after peak load. In contrast, the diamond mesh and the geogrid mesh lose its capacity quickly after peak load.