Proper selection of fans dependent on system needs is key in reducing the safety hazards in mining applications. Primary fans can be used at both the intake side, where air is directed into the tunnel or shaft entryway (pushing air), and return side, where air flows out of the tunnel system (pulling air). The most important factor is directing air to areas currently in use, while cutting off areas not being used, which can help increase efficiency and decrease operating costs. Flow can be manipulated by use of regulators and walls, to reduce airflow into specific areas. Flow rate is measured to ensure proper ventilation, find and correct leaks, and to verify the operating point of all the fans in the system. Even with these measures, sometimes airflow or pressure is not adequate. Auxiliary or booster fans can be brought it to compensate for additional airflow.
The best way to ensure proper fan selection for both primary and secondary fans for mining applications is to speak with an experienced engineer. Detailed application information, such as flow and pressure requirements, as well as any challenges experienced with past installations, and details about the location and environment, should be provided upfront to steer selection. The New York Blower Company has the expertise and technological capabilities necessary to select the most efficient fans dependent on specific job requirements. Contact your local representative to speak about your specific mine and tunnel ventilation requirements, or to request a quote.
Global Mining Review, January/February 2020 - Steve Back discusses important selection criteria when evaluating ventilation systems for underground mines.
Axial, Centrifugal and Mixed Flow Fans
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VXAP Axial Fans with inlet bell and diffuser