Boddington Gold Mine (BGM) is located about 130km southeast of Perth in Western Australia. Boddington Gold Mine (BGM) produced 741,000oz of gold and 69Mlb of copper in 2011. Image courtesy of Calistemon. The ore is initially produced by floatation, which produces copper/gold concentrate with approximately 18% copper. Image courtesy of Calistemon.
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crushing mills, among many others. In many countries, noiseinduced hearing loss is one of the ... Agency (EPA)/USA report in 1981, there are more than nine million Americans exposed to a daily average occupational noise level above 85 dB(A); this number has increased to about 30 million in 1990.
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noise emissions as follows: "7. (1) Noise emitted from any premises or public place when received at other premises must not cause or significantly contribute to, a level of noise which exceeds the assigned level in respect of noise received at premises of that
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The objective of this project was to develop noise control designs for secondary crushers in taconite plants. The project included reducing the noise levels of the secondary crusher at the Jackson County Iron Company, such that the levels at 1 meter from the basic unit and 1 1/2 meters above the floor are 85 decibels, aweighted network (dba).
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Example noise levels*: 96110dB (no noise reducing features) 8493dB (outside press enclosure) 8688dB (unloading stations) 7179dB (inside control rooms . Fit enclosure (all controls outside) or provide separate control room (noise refuge) Isolate vibrating parts from floor and enclosure . Maintenance of vibrator motors and mountings