Numerical analysis of air measuring station location in a rectangular airway after turning

The air measuring station of mine airway should be located in the fully developed region is proposed and numerical tests are conducted based on six models with a coal face as a prototype.The results show that,the distance between the reasonable location of air measuring station in head entry and the turning corner is much more than 10m.The reasonable location of air measuring station in different turning angles is 163~176m after the turning corner.In calculation the range of roughness heights of model 3,the reasonable air measuring station should set after the turning corner of 144~147m.