File:Coal miner spraying rock dust.jpg

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Size of this preview: 800 × 533 pixels. Other resolutions: 2,560 × 1,707 pixels | 3,216 × 2,144 pixels.

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	16:21, 4 December 2013		3,216 × 2,144 (654 KB)	JZNIOSH	User created page with UploadWizard

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File:Coal miner spraying rock dust.jpg from Wikimedia Commons

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Coal dust

Metadata

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Camera manufacturer	Panasonic
Camera model	DMC-TZ3
Author	Kenneth W. Fent
Exposure time	1/30 sec (0.033333333333333)
F Number	f/3.3
ISO speed rating	400
Date and time of data generation	11:19, 31 March 2009
Lens focal length	4.6 mm
Image title	This photo was taken 900 feet underground in a bituminous coal mine. The coal miner in the photo is spraying rock dust (primarily calcium carbonate). Rock dust is used to reduce the combustible fraction of coal dust in the air. We were at the mine for a health hazard evaluation (2009-0085) of coal miners’ exposures to respirable dust and silica during rock dusting. To me occupational health and safety means going into deep dark places to address health and safety concerns.
Horizontal resolution	240 dpi
Vertical resolution	240 dpi
Software used	Adobe Photoshop Lightroom 4.3 (Windows)
File change date and time	09:07, 16 May 2013
Exposure Program	Normal program
Exif version	2.3
Date and time of digitizing	11:19, 31 March 2009
APEX shutter speed	4.906891
APEX aperture	3.444932
APEX exposure bias	0
Maximum land aperture	3.44 APEX (f/3.29)
Metering mode	Pattern
Light source	Flash
Flash	Flash fired, compulsory flash firing
Sensing method	One-chip color area sensor
Custom image processing	Normal process
Exposure mode	Auto exposure
White balance	Auto white balance
Digital zoom ratio	0
Focal length in 35 mm film	28 mm
Scene capture type	Standard
Contrast	Normal
Saturation	Normal
Sharpness	Normal
Date metadata was last modified	05:07, 16 May 2013
Unique ID of original document	93E9551C43E96DF2F73706000BB215D6
Short title	WV Coal Miner
Keywords	NIOSH Safety Work Workers Workplace coalminer dust mine occupational rock dusting silica
IIM version	4