Design and experiment study on air curtain dust control device of mine fully-mechanized heading face

According to high dust concentration, low visibility of the working environment, fast mechanical wear degree and other disadvantages of the fully-mechan ized heading face in mine rock roadway, an air compressor was applied to provide the air sources of the air curtain dust control device. An air curtain dust control devic e with an air jet box, inverted U shaped jet chamber and other components was studied based on the mine rock roadway fully-mechanized heading face. In order to det ermine the rationality of the air compressor as the air sources and the dust control effect of the air curtain dust control device, mine trial roadway with a length of 15 m, width of 4 m and height of 5 m was built for the trial at the test base. The experiment results showed that high pressure air duct as the air sources of the air curtain dust control, before and after the air curtain installed, a total dust concentration at the operation location was 752.78 mg/m3 and 133.33mg/m3 individually. The dust control efficiency was 82.3%. An effective dust control air curtain could be formed, the environment of the mine rock roadway heading face was improved and thus the air curtai n dust control device could provide a new method to the dust prevention and control of the fully-mechanized heading face.