File:OldRoomAndPillar.png
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Summary
| Description |
English: Original caption: "Fig. 25. Method of Working the Georges Creek Big Vein, 1850." This illustrates room and pillar mining in its primitive form. There is no obvious ventilation planning, and both pillar sizes and heading orientation appear random. The notation "furnace" probably refers to a ventilation shaft where a fire was maintained to improve air circulation. |
| Date | |
| Source | Percentage of Extraction on of Bituminous Coal with Special Reference to Illinois Conditions, Engineering Experiment Station Bulletin No. 100, University of Illinois, page 91. Reprinted from H. V. Hesse and E. M., Maximum Recover of Coal Illustrations of Wasteful Early Methods of Mining in the Georges Creek Region and Suggested Economic Methods, Mines and Minerals Vol. XXIX, No. 8 (March, 1909), page 374. |
| Author | C. M. Young |
The text states that this plan is based on an actual survey, probably done in a mine near Frostburg Maryland. It would be interesting to track it down to its original location.
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This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 15:08, 20 July 2009 | | 1,313 × 837 (174 KB) | Douglas W. Jones | {{Information |Description={{en|1=Origional caption: "Fig. 25. Method of Working the Georges Creek Big Vein, 1850." This illustrates room and pillar mining in its primitive form. There is no obvious ventilation planning, and both pillar sizes and head |
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