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Transactions of the Institution of Mining Engineers Volume 35

Transactions of the Institution of Mining Engineers Volume 35


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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. 1908 Excerpt: ... sinking of the shafts commenced in April, 1903, and the Barnsley seam was reached, at a depth of 1,995 feet, in May, 1905. The greatest quantity of water was met with between the surface and the Shafton seam, which is 708 feet below the surface, and this water, amounting to 4,000 gallons per hour, is collected in the Shafton seam, and thence pumped into a reservoir at the surface. Pumps.--The pump is of the Evans Cornish direct-acting steam-driven type, 22 inches in diameter, with a stroke of 24 inches and a 7-inch double-acting ram; and it is capable of delivering 10,000 gallons per hour, against a head of 810 feet. It is intended to add another pump to duplicate this, hut that will be a motor-driven three-throw pump. A small pump is also to be fitted in the sump below the Barnslev seam, for pumping the water collected in the shaft below the Shafton seam into watertanks in the workings. This water amounts to about 500 gallons per hour, and the pumps will be of the centrifugal type, with 2-inch inlet, and motor-driven. Sinking Engines.--Both pairs of sinking engines have cylinders 2G inches in diameter, with a stroke of 5 feet, and drums 12 feet in diameter and 9 feet wide, keyed on the crankshafts, and fitted with steam-and foot-breaks, worked independently, and steam-reversing engines. The pair of engines at the No. 2 or upcast pit are now winding coal at the rate of six full tubs per wind, each tub holding 10 hundredweights. W inding-engines.--These have cylinders 48 inches in diameter, with a stroke of 7 feet G inches, and a winding-drum 24 feet in diameter by 12 feet in width. The engines are fitted with Cornish double-beat valves and steam-reversing gear. The Barnes-and-Markhani patent automatic cut-off is also fitted. The cages are made to hold twel...


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Product Details
  • ISBN-13: 9781231217627
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 350
  • Spine Width: 19 mm
  • Width: 189 mm
  • ISBN-10: 1231217626
  • Publisher Date: 01 May 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 626 gr


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