Strategic mine ventilation control : a source of potential energy savings

Issues related to ventilation requirements in mines were reviewed. Ventilation typically accounts for up to 45 per cent of the energy used in underground mines. Recent studies have demonstrated negotiating with diesel engine exhaust emissions is the most demanding ventilation requirement in mines. Trackless mining also requires large volumes of air. Ventilation is also required to control dust and noxious pollutants, as well as to control heat. However, some mines can appear to be over-ventilated. Two options are currently available to control ventilation requirements: (1) changes in design parameters for mobile diesel-powered equipment; and (2) ensuring that ventilation is used efficiently. The benefits of replacing diesel engines include downsizing auxiliary systems; reducing power requirements for primary system operations; and reducing amounts of energy consumed for air conditioning purposes. Despite the significant ventilation reduction potential of fuel cells and hybrid engines, the benefits may not be economically viable. It was concluded that the benefits of modifying ventilation design criteria must be carefully measured before implementing new ventilation control strategies. 4 figs.