Franken, Anja; Eloff, Frederik; Du Plessis, Johannes; Van Aarde, Michiel; Laubscher, Petrus; Booysen, J
(Mine Ventiliation Society of South Africa, 2009)
The National Institute for Occupational Safety and Health (NIOSH) has conducted research to improve the ventilation of large-opening mines whose entries are at least 93m2 (1,000 ft2). The ventilation of large-opening mines ...