Patent ID: 7740421
Filing Date: 2010-06-22
Classification: E21C,E21D,E21F

Abstract:
1. A water system for the admission of pressurized water to spray systems arranged on a powered support assembly for underground mining, comprising: at least one plow or shearer track spray system including at least one spray nozzle; at least one of a goaf space spray system including at least one spray nozzle, a canopy spray system including at least one spray nozzle, and a side spray system including at least one spray nozzle; a central water line for feeding the at least one plow or shearer track spray system spray nozzle and the at least one of the at least one goaf space spray system spray nozzle, the at least one canopy spray system spray nozzle, and the at least one side spray system spray nozzle; a spray valve block; a central water line connection located on the spray valve block; and a plurality of control valves, each of the plurality of control valves being arranged in the spray valve block, wherein each of the plurality of control valves is associated with a respective one of the plow or shearer track spray system and the at least one of the goaf space spray system, the canopy spray system, and the side spray system; and the spray valve block is located on the powered support assembly as a unit separated from a hydraulic valve block, wherein fluid circuits of the spray valve block are connected solely to the central water line such that the spray valve block is completely separated from a hydraulic medium.