Rock Drills Design Construction And Use
Rock Drills Design Construction And Use
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In our eReader you can find the full English version of the book. Read Rock Drills Design Construction And Use 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 Rock Drills Design Construction And Use
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1 Eng. And Min. Journ. , Dec. 14, 1907.
EXAMPLES OF ROCK DRILL PRACTICE 303 The hole is then cleaned with a blow-pipe made for the purpose, and charged with the heavy charge.
" In charging, the sticks are usually split down the side so that when tamped they will spread readily. Each stick is placed on the sharp end of a spoon and pressed to the bottom of the hole, where it is tamped with, a round wooden tamping stick of oak or hickory 8 to 12 ft. Long. The last stick or part of stick passed in ...contains the cap, or primer, and fuse, electric firing being employed in the district only for sinking purposes. This last stick is called the starter and is prepared by making a round cavity in the end of the mass of powder with a sharp stick. The primer is slipped over the end of the fuse and tightly crimped with a pair of pincers or the teeth so as to prevent water from moistening the primer. The end of the fuse bearing the primer is then inserted into the hole in the starter and the paper covering is drawn up over the fuse above the primer and securely tied with a stout string.
What to read after Rock Drills Design Construction And Use?
You can find similar books in the "Read Also" column, or choose other free books by Eustace M Weston to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
1 Eng. And Min. Journ. , Dec. 14, 1907.
EXAMPLES OF ROCK DRILL PRACTICE 303 The hole is then cleaned with a blow-pipe made for the purpose, and charged with the heavy charge.
" In charging, the sticks are usually split down the side so that when tamped they will spread readily. Each stick is placed on the sharp end of a spoon and pressed to the bottom of the hole, where it is tamped with, a round wooden tamping stick of oak or hickory 8 to 12 ft. Long. The last stick or part of stick passed in ...contains the cap, or primer, and fuse, electric firing being employed in the district only for sinking purposes. This last stick is called the starter and is prepared by making a round cavity in the end of the mass of powder with a sharp stick. The primer is slipped over the end of the fuse and tightly crimped with a pair of pincers or the teeth so as to prevent water from moistening the primer. The end of the fuse bearing the primer is then inserted into the hole in the starter and the paper covering is drawn up over the fuse above the primer and securely tied with a stout string.
What to read after Rock Drills Design Construction And Use?
You can find similar books in the "Read Also" column, or choose other free books by Eustace M Weston to read onlineMoreLess
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