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Lectures on Mining Delivered at the School of Mines, Paris (Volume 3)

Lectures on Mining Delivered at the School of Mines, Paris (Volume 3)


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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. 1886. Excerpt: ... CHAPTER XXII. ARRANGEMENTS AT THE SURFACE. (609) A. Haulage from the mouth of the mine to the point where the waggons are emptied. a. On the level. /8. Downhill. Ordinary inclined planes. Double-acting inclined planes, much used at the Grand-Combe mines. Balancepits. Combination of a shaft and a level. y. Uphill. Eaise the mouth of the shaft, or the level of the platform on which the waggons are received, by means of a scaffolding. Employ the winding-engine for the purpose of performing the accessory service of raising the waggons to the required height, either by drawing them up an inclined plane, or by raising water for working a water-balance, or have a small separate steamengine connected with the same boilers as the large one. B. Emptying the waggons or corves. The waggons having been brought to the pit top and conveyed along the surface, require to be emptied. The following operations are necessary: 1. Overturning the waggon. Various kinds of tipping-machine?. Emptying the large kibbles employed at Mons, already described Marsaut's tipping-machine. (See Ponson, Plate XLV.; Burat, Plates III. and IV.; Combes, Plate XLVI.) 2. Picking. 3. Screening. (See Ponson, Plate LXI.; Burat, Plate XXVI.) 4. Loading for sending off. (See Ponson, Plate LXIII.) This is done in two ways. 4 Distinguish the two leading principles: a. For economy of labour. (Newcastle, Mons, &c.) fi. For saving the large coal, facilitating the picking. (GrandCombe, &c.) The choice to be made depends on commercial considerations, on the hardness of the coal, on the larger or smaller proportion of stones, &c. Note.--The part of this chapter referring more particularly to the mechanical preparation of coal will be fully treated further on. CHAPTER XXIII. ON THE MECHANICAL PREPARATION OF M...


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Product Details
  • ISBN-13: 9781153948531
  • Publisher: General Books
  • Publisher Imprint: General Books
  • Height: 246 mm
  • No of Pages: 82
  • Spine Width: 4 mm
  • Width: 189 mm
  • ISBN-10: 1153948532
  • Publisher Date: 05 Feb 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 213 gr


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