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Lectures on Mining Delivered at the School of Mines, Paris (Volume 1)

Lectures on Mining Delivered at the School of Mines, Paris (Volume 1)


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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. 1876. Excerpt: ... both for the different stories or horizons of one and the same deposit and for the different deposits of the same horizon.. Such in our opinion are the answers to be made to the four questions asked above (No. 256). (261) Summing up what has just been said, we see what are the considerations by which the limits of the working area belonging to a given cenlre of production are fixed; how this indefinite working area, unlimited at all events in depth, is subdivided into horizons or stories by a series of preparatory works carried out successively at different levels; and lastly, what order ought generally to be followed, cither in working the different parallel deposits intersected by these preparatory works, or in working the different horizons of the same deposit. It remains be seen how we should proceed to work one of these stories of a given deposit, and now, for the first time, wc come to the question of the Method of exploitation, removal or working away, applicable to this deposit. The methods of removal, contrary to what is the case in the works of first establishment and the preparatory works, depend, up to a certain point, on the nature of the deposit, and essentially upon its geometrical characters, especially its thickness and dip. The different methods must be described in detail; because the choice, for a given deposit, and the proper and skilful application of the method chosen, are some of the most essential subjects which an engineer has to consider. Although a great variety of methods are employed, as will, be seen further on, some general remarks may be made concerning them. (262) Where a deposit is sufficiently developed to be workable, one at least of Us dimensions is always very great, or may be looked upon as pratically unlimited. Of...


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Product Details
  • ISBN-13: 9781154040692
  • Publisher: General Books
  • Publisher Imprint: General Books
  • Height: 246 mm
  • No of Pages: 154
  • Spine Width: 8 mm
  • Width: 189 mm
  • ISBN-10: 1154040690
  • Publisher Date: 01 Feb 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 340 gr


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