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Principles of Mining: Valuation, Organization and Administration: Copper ...
No preview available - 2017
Principles of Mining: Valuation, Organization and Administration
No preview available - 2015
advantage alternative amortization amount annual application arise assay average banket basis broken Broken Hill calculations capital outlay character combined shaft comparative compressed air compressed-air copper cost crosscuts cubic foot demand dependent determination discussion distance drill duction economic electrical equipment exhausted expenditure extension in depth factors feet filled with waste fixed charges foot gold haulage holes horizon inclined deposits increased installation investment labor less levels limitations load loss machine-drilling machines mechanical efficiency ment metal contents metal mines method miners mining engineer operating ore-bodies ore-breaking output oxidized pillars possible price of metal production profit in sight prospecting pumps result rill risk roadway rock samples saving shoveling skip speculative speed square-sets steam stulls sublevels sulphides surface timber tion tonnage tons transmission transmission medium tunnel underground usually valuation vertical shaft volume walls warrant West Australia width winding winzes zinc zone
Page 167 - When this stage arrives, violence disappears in favor of negotiation on economic principles, and the unions achieve their greatest real gains. Given a union with leaders who can control the members, and who are disposed to approach differences in a business spirit, there are few sounder positions for the employer, for agreements honorably carried out dismiss the constant harassments of possible strikes.
Page 168 - The sooner some miners' unions develop from the first into the second stage, the more speedily will their organizations secure general respect and influence. "The crying need of labor unions, and of some employers as well, is education on a fundamental of economics too long disregarded by all classes and especially by the academic economist. 'When the latter abandon the theory that wages are the result of supply and demand, and recognize that in these days of international flow of labor, commodities...
Page 182 - Mr. HC Hoover has tabulated the risks of mining as follows.:* " 1. The risk of continuity in metal contents beyond the sample faces. " 2. The risk of continuity in volume through the blocks estimated. 3. The risk of successful metallurgical treatment. ; 4. The risk of metal prices, in all but gold. 5. The risk of properly estimating costs. ' 6. The risk of extension of the ore beyond exposures.
Page 168 - ... the real controlling factor in wages is efficiency, then such an educational campaign may become possible. Then, will the employer and employe find a common ground on which each can benefit. There lives no engineer who has not seen insensate dispute as to wages where the real difficulty was inefficiency. No administrator begrudges a division with his men of the increased profit arising from increased efficiency. But every administrator begrudges the wage level demanded by labor unions whose policy...
Page 19 - Proved Ore Ore where there is practically no risk of failure of continuity. Probable Ore Ore where there is some risk, yet warrantable justification for assumption of continuity. Prospective Ore Ore which cannot be included in the above classes, nor definitely known or stated in any terms of tonnage.
Page 2 - ... in sight." In other words, mine valuation. Hoover states in his "Principles of Mining": "It should be stated at the outset that it is utterly impossible to accurately value any mine, owing to the many speculative factors involved. The best that can be done is to state that the value lies between certain limits, and that various stages above the minimum given represent various degrees of risk. Further, it would be but stating truisms to those engaged in valuing mines to repeat that, because of...
Page 193 - It is he whose intellect and direction bring to the world the comforts and necessities of daily need. Unlike the doctor, his is not the constant struggle to save the weak. Unlike the soldier, destruction is not his prime function. Unlike the lawyer, quarrels are not his daily bread. Engineering is the profession of creation and of construction, of stimulation of human effort and accomplishment.
Page 43 - Mr. Hoover in his admirable work on mine valuation says: | " What rate of excess return the mine must yield is a matter of the risks in the venture and the demand of the investor. Mining business is one where 7 per cent above provision for capital return is an absolute minimum demanded by the risks inherent in mines, even where the profit in sight gives warranty to the return of capital.
Page 48 - ... always staking his capital on the probability of having it returned within a certain time. In other words, he is gambling on the life of the mine. If a man invests money in a mining stock which yields only 5 per cent. on Annual Rate of Dividend Number of years of life required to yield — per cent interest, and in addition to furnish annual instalments which. if re-invested at 4 Per Cent. will return the original investment at the end of the period. Per Cent. 5 Per Cent. 6 Per Cent. 7 Per Cent....
Page 42 - ... some of the porphyry coppers, the large Rand amalgamations and a few others, where the ore reserves are enormous, amortization tables may be applied, but in the vast majority of mines it is out of the question. The theory of redemption or amortization of capital, according to Mr. Hoover, is that: "A portion of the annual earnings must be set aside in such a manner that when the mine is exhausted the original investment will have been restored.