File:Coal mining in Illinois (1915) (14754542206).jpg

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Identifier: coalmininginilli13andr (find matches)
Title: Coal mining in Illinois
Year: 1915 (1910s)
Authors: Andros, S. O Illinois State Geological Survey University of Illinois (Urbana-Champaign campus). Dept. of Mining Engineering United States. Bureau of Mines
Subjects: Coal mines and mining
Publisher: Urbana, (Ill.) : University of Illinois
Contributing Library: University of Illinois Urbana-Champaign
Digitizing Sponsor: University of Illinois Urbana-Champaign

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Fig. 29. Steam-shovel digging erburden behind the shovel is mined. The shovel having completed thefirst circle begins a second just inside the first and continuesto move in circles with constantly decreasing diameters. In the second method, the shovel instead of traveling ina circle goes forward and back across the property in parallelstraight lines, a haulage-way for disposing of the materialmined being maintained at one side of the property.
Text Appearing After Image:
MINING PKACTICE 111 Where the shale overlying the coal is to be used for themanufacture of brick or for other purposes and is overlaid bysoil, the soil is first removed by hydraulicing. As fast as thecoal is mined, the top soil for 50 feet from the edge of thebank of the cut is washed off into the pit left by the removalof the coal. For washing off the top soil hydraulic monitorsunder a pumping-head are used as shown in fig. 28. Theamount of top soil washed per eight-hour shift varies withthe material removed; in tight ground 100 cubic yards may bethe total for eight hours; in loose ground, 2,000 cubic yardsmay be washed off. Fig. 29 shows the shovel digging theshale overburden and exposing the coal after the top soilhas been washed off. In blasting stripped coal, holes 2%inches in diameter are drilled 12 feet apart at a distance of5 to 9 feet from the face. These holes are drilled with ahand auger or with an air drill, the air being furnished bya portable compressor. The average char

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https://www.flickr.com/photos/internetarchivebookimages/14754542206/

Author

Andros, S. O; Illinois State Geological Survey; University of Illinois (Urbana-Champaign campus). Dept. of Mining Engineering;

United States. Bureau of Mines
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(Reusing this file)		 At the time of upload, the image license was automatically confirmed using the Flickr API. For more information see Flickr API detail.
Volume
InfoField
Coal Mining Investigations No.13
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Flickr posted date
InfoField
29 July 2014


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current22:02, 8 January 2016Thumbnail for version as of 22:02, 8 January 20163,424 × 2,380 (1.52 MB)SteinsplitterBot (talk | contribs)Bot: Image rotated by 90°
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