URZADZENIE DO ZAPOBIEGANIA POWSTAWANIU PYLU,ZWLASZCZA PYLU SKALNEGO,ZE STROPU I ZAWALU PRZY OBUDOWIE TARCZOWEJ LUB KROCZACEJ,ZWLASZCZA W KOPALNI WEGLA

摘要

An assembly for preventing the falling of dust and debris from the roof and from the break of a mine, particularly a coal mine. The assembly comprises a shield support structure having roof bars and a roof covering disposed between the roof of the mine and the roof bars. The roof covering includes a welded wire-netting sheet having longitudinal and transverse wires with a dust-tight web welded or fixed in between said longitudinal and transverse wires.