The Deep level Mines of the Rand and Their Future Development Considered from the Commercial 1902 - Softcover

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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. ...on a 100-stamp basis. This figure is approximately the average to be deducted from the statement of expenditure on deep-level properties on the Witwatersrand at the present date. In the case of the 40 claims and 60 stamps, the equipment and development figures at £5800 per stamp. It has been shown that a company of 40 claims containing 20,000 tons per claim valued at 15s. per ton profit, situated 5000 feet from the outcrop, where the average dip is 40 degrees, is not a paying one; whilst, on the contrary, if the size of the property is increased to 100 claims it becomes a sound paying one. The factors of value assumed are based on the data available at present time, and regarded from a general standpoint, may be taken as in the neighbourhood of average. On this basis, therefore, it is evident that we require at least 100 claims to make the scheme a profitable one. As between mine and mine, however, in individual cases, there will be found an infinite divergence in all of these factors, and each case must be treated on its peculiar merits. That is to say, it is impossible to establish any rule to apply equally to all properties situated at a distance of 5000 feet, or any other distance, from outcrop. For instance, in the two cases exemplified, the former may be in a neighbourhood where the grade is such that a profit of 30 per ton may be looked for, or the reef thickness may prove to be equal to 40,000 tons per claim. Either of these variation make all the difference to the proposition, and 40 claims containing 40,000 tons per claim, capable of yielding a total recovery of 60s. per ton, is obviously a much more valuable proposition than 80 claims at 20,000 tons per claim, at the same recovery value per ton. In regard to capital...

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