Impact of Shuttle Car Movements on Face Ventilation.
Volkwein-JC; Thimons-ED; Jayaraman-NI
Proc 4th Us Mine Vent Symp Berkeley Soc Min Metall & Explor Wilton Company, 1989 :190-194
The U.S. Bureau of Mines has studied the impact of shuttle car movement on face ventilation. Real-time measurements of air velocity, methane gas, and respirable dust were recorded and compared with a time study of face shuttle car movement. Work was conducted in a blowing face ventilation section where a scrubber- equipped mining machine operated. Air velocities decreased by an average of 35 pct as the shuttle car entered the face, restricting air flow, and increased by an average of 35 pct as the shuttle car pulled away from the face, drawing with it additional air. Return air methane levels follow the face air flow volumes, decreasing as air volume increases. The surge of air created as the shuttle car leaves the face helps to dilute methane. Respirable dust levels, however, increased as the air flow increased and decreased the scrubber capture efficiency.
Proc 4th Us Mine Vent. Symp., Berkeley; Soc Min, Metall, & Explor, Wilton, Co, 1989, Pp 190-194