Device for automatic wasserbedüsung in mining - recovery operation

摘要

A device for effecting automatic water spraying in a mine working employing an advanceable roof support system. The device has an elongate body with an inlet for receiving water under pressure and an outlet extending transversally of the inlet for feeding water to spray nozzles. A valve is disposed between the inlet and the outlet and is in the form of a ball urged against a seating by the water pressure.