Improving Duct Parameters to Design Auxiliary Ventilation in Mining Roadways Driven

Abstract

The level of air leakage of air movement through the duct to the face in underground mine is an important factor in ensuring the efficiency of ventilation during mining roadways being driven in mine. Ventilation ducting system leakage can, in many cases, supply an insufficient quantity of air to the workplace. Based on the experimental data of the duct leakage measurement when mining roadways driven in Ha Lam Coal mine, a relationship of leakage coefficient, aerodynamic parameter and geometric parameter of the duct has been derived; also maximum vent length with certain auxiliary ventilation equipments has been determined.