Page 111 - Advanced Mine Ventilation

92 Advanced Mine Ventilation

2. Calculate the pressure developed by an axial flow fan, given the same conditions as above but

blade angle, a ¼ 35 .
3. Calculate the NVP for a deep gold mine, given the following conditions:
D ¼ 10,000 ft; W 2 ¼ 0.075 lb/ft 3

t 3 ¼ t 4 ¼ 100 F; e ¼ 0.8 in. of Hg.
B ¼ 30 in. of Hg.

References

[1] Jorgensen R. Fan Engineering. Howden Buffalo Inc.; 1999.
[2] Weeks WS. Ventilation of mines. New York, NY: McGraw Hill; 1926.
[3] McElroy GE. Engineering factors in the ventilation of metal mines. USBM Bulletin No.
385; 1935.
[4] Rees JP. Ventilator calculations, transvaal chamber of mines. Johannesburg: South Africa;
1950.
[5] Hinsley FB. New method of calculating the natural ventilation in mines. Colliery Guardian
1965;211(5454).