Ventilation of Deep Mines in Northern Ontario

The numerous factors associated with the prov1s1on of satisfactory air conditions in hot and humid Canadian mines are described. The main heat sources are auto-compression and the actual flow of heat from the rock. Temperatures reach 97°F at a depth of 8,100 feet. Various methods used in coping with high temperatures are described, including the use of ice stopes and heat exchangers. Moisture control, desirable air volumes and velocities, sizes of airways and methods of distribution are important considerations. A comparison of the temperatures, humidities and types of airways of two deep mines should prove useful in the design of future ventilation systems.
Keywords: Air, fresh air, geothermal gradient, Northern Ontario, South Africa, stopes, Heat, Mine, Mines, Rock, Rocks, stope, Temperature, Ventilation
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