Report on the inspection of the Khost and Shahrig coal mines, Baluchistan; 1896

 
9781236140753: Report on the inspection of the Khost and Shahrig coal mines, Baluchistan; 1896

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. 1898 Excerpt: ...dip drifts range from 150 feet to 430 feet deep. The level tuinels are from 300 feet to 450 feet long. At Takrai there is first 300 feet of level tunnel and then 300 feet of dip road in which a cage works. (5) As to how the shafts or outlets are secured.--Where the ground is soft near the surface the old tunnels are arched with stone and mortar, a round arch with vertical walls nearly 3 feet thick. All other parts are timbered where necessary with new and old railway sleepers, and also round props and planks for backing at sides and roof. Three sides are timbered, but at Takrai dip four sides are timbered. 6) Relative positions of outlets.--There are none less than' 48 feet apart, but the least horizontal distance ought ordinarily to be 60 feet. The tunnels are about 2,000 feet apart. (7) As to how persons enter and leave the mine,--They walk or climb in and out. At Takrai they are allowed to ride once down and once up the dip in each shift in a tub on the cage. At other times, they travel down or up the ladders in the back dip for 250 feet and the remainder down two stentons, each 25 feet long, and fitted with ladders. (?) As to how minerals brought out of the mine.--It is wound up at the Takrai dip in tubs on the cage, one tub on each cage, and run out of the tunnel to surface in the same tubs pushed by two men. At other parts it is brought out in gunny bags on a flat-bottomed tram, from six to eight bags on a tram, and pushed by two men. When driving the dips, the coal is pulled out in bags with hemp ropes and pulley block, or jack roll, or geared crab. Water is wound out by means of long iron rectangular buckets, J open at the top, with single iron and leather butterfly valve. (p) Age and experience of enginemen and 5oilermen.--Th& enginemen and the...

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