Report of Commission Appointed to Investigate the Waste of Coal Mining with the View to the Utilizing of Waste

Report of Commission Appointed to Investigate the Waste of Coal Mining with the View to the Utilizing of Waste

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1893 edition. Excerpt: ... to be all in one horizontal bed with a length equal to the surface length of the lowest workable bed. Reference: --Geological Survey of Pennsylvania. N. C. F., mine sheet 23. N. C. F., cross-section sheets 8 and 9. N. C. F., columnar section sheets 16. On the south side of the basin there is a bed between the Shaft and Clifford beds from 2 to 6 feet thick; this is not included in the estimate, as it is counterbalanced (more or less) by the fact that on the north side of the basin there is an area of somewhat uncertain extent where no coal below the Shaft bed is found of workable thickness. Reference: --Geological Survey of Pennsylvania. N. C. F., mine sheets 21 and 22. N. C. F., cross-section sheets 8 and 9. N. O. F., columnar section sheets 15 and 16. Average Aver. thick-Len th Len gth of bed. Name of Bed. thickness ness of coal, of bged Coal 1 foot of bed. 81.8 per cent. ' thick. Feet. Feet. Feet. Feet. "Top " coal....... 7.3 6.0 5,640 33,840 Shaft or "Bottom" coal. 6.2 5.1. 6,300 32,130 Third......... 3.8 3.1 3,350 10,385 Dunmore........ 3.5 2.9 4,600 13,340 Total coal reduced to units of one foot in thickness.... 89,695 Surface underlaid by lowest workable bed......... 8,180 Average thickness of coal per foot of surface....... 10.96 REMARKS. The Third coal-bed, which is shown on the section as a split of the " Bottom " coal, and the Dunmore bed have not been found at their northern outcrop, and I have estimated these beds as workable for about one-half of their natural length on line of section. The "Top" and "Bottom" coal-beds are extensively worked in this vicinity. Reference: --Geological Survey of Pennsylvania. N. C. F., mine sheets 19 and 20. N. C. F., cross-section sheets...show more

Product details

  • Paperback | 42 pages
  • 189 x 246 x 2mm | 95g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236813561
  • 9781236813565