登入選單
返回Google圖書搜尋
出版Canada Centre for Mineral and Energy Technology, 1987
URLhttp://books.google.com.hk/books?id=jMEmjwEACAAJ&hl=&source=gbs_api
註釋Several sources of respirable airborne dust are present in underground hard rock mines. Recently, a fan system manufactured by Cogema (France) was developed with a silencer to reduce noise exposure. To protect the sound damping materials of the silencer, a dust filter section was added to the fan intake section. It is claimed that the filter also helps reduce airborne dust and radioactive contaminants when the fan is used as a secondary ventilation unit. This evaluation was conducted in an underground uranium mine and tests were designed to assess the filter's ability to reduce airborne respirable dust as well as airborne radioactive contaminants. Results of the radiation part of the survey are given elsewhere.