The Deep-Level Mines of the Rand and Their Future Development; Considered from the Commercial Point of View
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The Deep-Level Mines of the Rand and Their Future Development; Considered from the Commercial Point of View

The Deep-Level Mines of the Rand and Their Future Development; Considered from the Commercial Point of View


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About the Book

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. 1902 edition. Excerpt: ...and this must, in every instance, be carefully studied when contemplating mill erection. The questions above considered have a very important bearing upon the problem of how best to plan the development and equipment, that the ultimate profit which the mine is expected to yield may be soonest realized, consistentlj' with a fair redemption of the capital outlay on plant. In considering this question, let us assume that we are dealing with a deep-level mine in the Central Witwatersrand which has an area sufficient to produce payable milling ore for 200 stamps for 20 years. Let it be assumed that the vertical shafts are sunk, and development of the mine proper is about to begin, and the value of the ore, as figured from the results of the producing mines in the immediate vicinity, has been arrived at. The first question that arises is, How soon may milling commence? This would firstly be dependent upon the conditions which were disclosed at the points where the reef was struck--that is, as to whether or not the country had been subjected to faulting; and secondly, as to whether the ore grade indicated a confirmation of the estimates which were fixed, based upon the results obtained from the neighbouring mines. If all the evidence pointed to the existence of normal conditions, then milling plant would be immediately ordered, and at 12 months from the date of order, given favourable conditions--all plans in readiness and materials awaiting shipment--it would be possible to start milling with 100 stamps, which would be gradually increased to 200 stamps as the development progressed. Let it be assumed that at the time the 200 stamp8 begin running the mine has a life of 20 years, and let the profit, on a treatment of 28,000 tons per month, be...


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Product Details
  • ISBN-13: 9781152708662
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 58
  • Spine Width: 3 mm
  • Width: 189 mm
  • ISBN-10: 115270866X
  • Publisher Date: 01 Apr 2013
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 122 gr


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