Oval ducts in mining ventilation systems: Optimization of the operation costs and increase of clearance in mine roadways

To optimize the clearance in mine roadways and reduce operation costs, new oval ducts can be used in auxiliary ventilation systems instead of conventional circular ducts. In this work, an experimental study was conducted to investigate the performance of conventional circular ducts compared to two types of oval ducts with equivalent cross-sectional area. The laboratory tests were conducted on a te...