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. 1907 edition. Excerpt: ...Nourse Deep, a considerable amount of water was met in depth, with the occurrence of disturbed ground. All these large flows of water gradually decrease, after their first outburst, to quantities which are easily dealt with. The ordinary mine water, as it is pumped from the mine, is generally very impure, as ...
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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. 1907 edition. Excerpt: ...Nourse Deep, a considerable amount of water was met in depth, with the occurrence of disturbed ground. All these large flows of water gradually decrease, after their first outburst, to quantities which are easily dealt with. The ordinary mine water, as it is pumped from the mine, is generally very impure, as is shown by the following analysis of water from the Spes Bona: --Per gallon. Persulphate of iron..... 13.40 grains Sulphate of calcium.... 6.00 Carbonate of ..... 14.00, Matter in suspension..... 2.87, Total sulphuric acid..... 11.00 Total solids...... 34.18 Reaction of the water, acid. One gallon is approximately 58,485 grains. Most of these impurities are due to the oxidation of the ore, as is shown by a comparison of the above analysis with one of water taken from the sump of No. 1 shaft, Robinson Deep, just about the time the reef was struck: --Fer gallon. Permanent hardness..... Nil Temporary hardness..-3-23 grains Sulphuric acid...... Trace Chlorine....... 0.64 Total solids...... 19.72, Reaction of water, alkaline. The amount of water met with in sinking the vertical shafts of the deep levels is generally small, causing no serious interference with the operations. It is generally dealt with in the following manner: the surface water is collected in a sump, at a depth of from 150 to 250 feet below surface, and pumped to the surface by itself by a steam pump generally of the duplex type, about 4 or 6 inches in diameter. This water is collected by a ring cut around the shaft, as described on p. 188, and guided into a chamber which is generally cut into the pump end of the shaft. The water, which comes into the shaft below this, is collected by "ringing" the shaft at the desired points and...
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