Protection against rock fall in mine - comprises corrugated arched plates located across gallery just under roof, fixed to sidewalls on anchored brackets

摘要

Protection against rock fall in a mine comprises arched plates (2) set under the roof across the gallery, with their ends fixed to the sides of the gallery (1) on brackets (3) anchored (4) to the rock face. The plates are corrugated in cross section. USE/ADVANTAGE - The ends can be let into the rock face as an alternative to the brackets, but the latter method is preferred.