Advanced control method and theoretical analysis on reversed airflow of mine main shaft in winter

Acording to the readily occurrence of airiow reversal in winter which was ificut to prevent and control in main intake shaf of cal mines in China,theeffect of natural wind pressure on airfiow status in main shaft as analyze thoreticaly: n combinaton withthe mine cas e,the cauises faificw feversalocured in main shat in winter were discussed by measuring and analzing the change of natural wind pressure between intake shatis and the advance control method ofthis phenomenonwas alsoresearched. The resuts showed that with the decreasing of atmospheric environment temperature the average temperatr diference between intakesthatis with diferent heat souce ditiribution was increased gradual y.which resulted in he accumuilation of natural wind pressure and further caused the aifiow reversain main shat in winter .The matho d of montoring intake shafisair temperature and wind speed in real time and regulating the volume of hot air for heating intake shafswas put forward. This metaod was easy and fe astble, and coud decrease thearfovw temcerature diffrence betwee intake shatis and make the main shat's aifiow state changed in one hour. Using this method,the main shaft's airfiow reversal could be prevented and contrlled conveniently and effectively