Ventilation shafts are critical in these setups, as they introduce fresh air into deeper sections and expel contaminated air. These shafts are typically placed at regular intervals along the tunnel to ensure …

Responsible for the placement of all ventilation infrastructure for the fresh air raise, Nahanni was responsibly for a key element in Diavik’s transition to underground mining.

Oct 26, 2016 · Ventilation is the control of air movement: its amount, its quality and its direction, to maintain a safe and healthy environment in which miners can work. A lack of proper ventilation can …

The Fresh Air Raise required custom structural steel supports and frames designed to optimize underground ventilation.

A ventilation plan is needed on how to convert the existing system to the new system – this includes how to intake the current exhaust system and how to connect to the new exhaust raise.

Oct 18, 2010 · This is a fresh air raise that delivers ventilation to the lower portion of a mine in Sudbury Ontario. It is 1500ft deep,25ft in diameter and on an 80 degree incline.

2. East Fresh Air Raise (EFAR) or East Return Air Raise (ERAR) ly in Big Gossan feasibility study the last east side raise is functioned as Return Air Raise, 6m diameter. Based on the new stope …

The main return air raise (RAR) fans are also equipped with silencers to attenuate the noise levels. The two most common set points, for both main return fans, are 800 rpm during the summer months and …

The project involved the installation of a heater module as well as fan and ducting to provide heated fresh air to the underground operations at each of the two open pit mines.

Aug 1, 2022 · Typically, fresh air is delivered to the main backbone of the mine via intake raises or a fresh air portal by using large intake or exhaust fans. The contaminated air is exhausted to the …