IMPACT RESISTANT CAMBERED LAGGING ELEMENT

摘要

The present invention provides cambered impact resistant lagging roof panels for an arch support assembly which is designed for withstanding the effects of rock bursts in an underground mine. The impact resistant panels are aligned in a parallel series with their cambered faces facing upwardly and positioned transversely between adjacent sets of steel arch supports of the assembly. The impact resistant lagging panels are constructed as C-shaped metal channels with their channel openings facing downward. The panels are retained between adjacent beams under compression.