Heat Treatment and Ventilation Optimization in a Deep Mine

Table 1

Air volume of underground ventilation shaft in 1118 m pit of Jinqu Gold Mine.

Ventilation tunnel	Air volume (m^3/s)	Air speed (m/s)
1118 m pithead inlat air tunnel	22.3	2.1
Blind shaft entry	21.5	2.4
640 m level main air tunnel	21.1	2.3
640 m level leading to the main return air tunnel	18.3	3.4
440 m inclined shaft airway	5.4	1.2
440 m level return air well	5.2	2.1
440 m level working face	0.2	0.07
280 m inclined shaft airway	0	0
280 m level return air well	0	0
280 m level working face	0.1	0.05