Abstract: Large amount of blasting dust are generated in the stope of metal mines， which not only seriously harms the occupational health of underground workers， but also causes air pollution when discharged to the ground through the return air shaft. Based on this， a new type of multi-component water stemming formula was developed. Taking the roadway stope of Meishan Iron Mine as the test site， the dust changes of four types of water stemming and the changes of CO and NO concentration in the fumes after blasting were measured by means of on-line monitoring， and the inhibition effect of different types of water stemming on the fumes and dust of stope blasting was analyzed. The results show that: the changes of CO and NO concentration follow the law of "double peak curve" after stope blasting， which is basically universal； the multi-component water stemming has a better performance in dust suppression than that of the common water stemming， and its relative respirable dust reduction rate is much higher than that of total dust， that is to say， multi-component water stemming has better respirable dust suppression effect； in the aspect of toxic and harmful gas suppression， compared with common water stemming， the multi-component water cannon mud increased the inhibition efficiency of CO by 51.9%， but has not significant inhibition effect on NO， that is， the additives in multi-component water stemming has an obvious inhibition effect on CO， while the clear water plays a key role in the inhibition of NO.

Key words: Stope blasting, Multi-component water stemming, Dust and smoke, Suppression effect