Distribution Characteristics of Dust Produced in Cutting Coal and Prevention Technology at Fully-mechanized Coal Face

On the basis of analyzing the speed wind and distribution characteristics of dust concentration around shearer. Combination spray, space "vertical crossing "high-pressure spray formed in tumbler, is used to control the dust production in cutting coal. Research shows that the increase of local wind speed is the aggravated dust pollution in driver operating region, the dust spreads faster when cutting coal against wind, and the dust concentration is higher in shearer downwind side when following wind. After taking the dust reduction technology, the dust removal efficiencies of driver position and shearer downwind side 10 m are 82.72% and 86.63% respectively.