5.1. INTRODUCTION5.2. THE ATKINSON EQUATION AND THE SQUARE
LAW5.3. DETERMINATION OF FRICTION FACTOR5.4. AIRWAY
RESISTANCE5.4.1. Size of airway5.4.2. Shape of airway5.4.3. Airway
lining5.4.4. Air density5.4.5. Shock losses5.4.6. Mine
shafts5.4.6.1. Shaft walls5.4.6.2. Shaft fittings5.4.6.3.
Conveyances5.4.6.4. Entry and exit losses5.4.6.5. Total shaft
resistance5.4.6.6. Methods of reducing shaft resistance
