The design for the pre-ventilation system of the Okaba Coal deposit required 145 m3/s of air with a main fan pressure of 2.73 kPa, with four booster fans of air volume, 110 m3/s, 125 m3/s, 95 m3/s, 105 m3/s with fan pressure of 0.63 kPa, 0.87 kPa, 0.47 kPa, 0.50 kPa and with exhaust fan of 70 m3/s at fan pressure of 0.38 kPa respectively, all required to ventilate the mine. The design is basically on longwall mine as it met the geological condition, engineering properties of the deposit and the design parameters to ensure better safety of miners and offers a great coal recovery. CAD software (AutoCAD) was used in the complete design of the underground coal mine ventilation system for Okaba Coal deposit.
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