Handbook of Mining Details
Handbook of Mining Details
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In our eReader you can find the full English version of the book. Read Handbook of Mining Details Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Handbook of Mining Details
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Plank and is held in position by a sprag across the drift as shown. The sprag has to be moved once or twice during a round, but this does not take much longer than changing the height of the arm on the column of a piston 106 HANDBOOK OF MINING DETAILS machine. All thp holes except the lifters are given an upward slope; they are put in nearly horizontal and cleaned with a blowpipe connected to the air supply.
Driving Inclined Raises with Stoping Drills (By Arthur O. Chris- tensen) . The usual pr...actice is to drive raises to connect levels for ventilation, or to prospect veins or the country above tunnels, as small as is possible to work in, to drive them perpendicular, and to timber with pairs of stulls 3 1/2 or 4 ft. Apart. In the case of such work I have found two styles of raise easier, cheaper and safer to drive than the type mentioned. The first is a type of in- clined raise which is described below. The second is a type of vertical raise described in the following article.
The inclined raise may be run at any desired angle in the vein, or may cut through the country rock.
What to read after Handbook of Mining Details?
You can find similar books in the "Read Also" column, or choose other free books by Charles Herman Fulton to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Plank and is held in position by a sprag across the drift as shown. The sprag has to be moved once or twice during a round, but this does not take much longer than changing the height of the arm on the column of a piston 106 HANDBOOK OF MINING DETAILS machine. All thp holes except the lifters are given an upward slope; they are put in nearly horizontal and cleaned with a blowpipe connected to the air supply.
Driving Inclined Raises with Stoping Drills (By Arthur O. Chris- tensen) . The usual pr...actice is to drive raises to connect levels for ventilation, or to prospect veins or the country above tunnels, as small as is possible to work in, to drive them perpendicular, and to timber with pairs of stulls 3 1/2 or 4 ft. Apart. In the case of such work I have found two styles of raise easier, cheaper and safer to drive than the type mentioned. The first is a type of in- clined raise which is described below. The second is a type of vertical raise described in the following article.
The inclined raise may be run at any desired angle in the vein, or may cut through the country rock.
What to read after Handbook of Mining Details?
You can find similar books in the "Read Also" column, or choose other free books by Charles Herman Fulton to read onlineMoreLess
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