Transactions of the Federated Institution of Mining Engineers Volume 12
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Transactions of the Federated Institution of Mining Engineers Volume 12

Transactions of the Federated Institution of Mining Engineers Volume 12


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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1897 Excerpt: ...Hose-pipe watering is also largely practised. The underground conditions of the company's collieries are such that dry cleaning of dust is totally inadequate. Trans. Fed. Inst., vol. xii., page 282. VOL. XII.-1890-97. OCEAN COAL COMPANY, LIMITED: DEEP NAVIGATION COLLIERY. The Deep Navigation colliery comprises two winding-shafts, each 17 feet in diameter. The No. 1 shaft is used as a downcast, and is sunk to a depth of 2,280 feet to the 9 feet coal-seam; and the No. 2 shaft is used as an upcast. Each of the shafts is fitted with steel-rail slides. At the No. 1 shaft is a Cornish pumping-engine, with a cylinder 100 inches in diameter, and 11 feet stroke. There are seven forcingpumps on the pumping-engine, between the surface and the four feet landing, all of 10 feet stroke. The three top pumps are 26 inches in diameter; the two next pumps are 22 inches in diameter; and Nos. 6 and 7 pumps are 10 inches in diameter. A small special pump placed in the six feet landing delivers its water into the No. 7 lift. The lengths of each set of pumps respectively are 255, 270, 285, 800, 285, 300, and 270 feet. The pumping-engine is now only worked at the rate of two strokes in 70 seconds, but is capable of being worked at the rate of four strokes per minute. The total weight of spear-plates, pump-rods, and rams is 194 tons. There is a counter-balance beam in the shaft at a depth of 735 feet, one end being connected to the pumprods and the other end carries a weight of 30 tons. The winding-engine has two inverted vertical cylinders, each 54 inches in diameter, and 7 feet stroke. The winding-engine lifts 4 trams of coal on two flats at one lift (each tram when loaded weighs about 32 cwts.), and together with the cage, shackles, and rope raises a total weight at the start fr...


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Product Details
  • ISBN-13: 9781130013115
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 332
  • Spine Width: 18 mm
  • Width: 189 mm
  • ISBN-10: 1130013111
  • Publisher Date: 01 Mar 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 594 gr


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