Download Blasters Training Manual for Farmers, Ranchers, Prospectors, by R.K. [Ken] House PDF

By R.K. [Ken] House

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Extra resources for Blasters Training Manual for Farmers, Ranchers, Prospectors, Engineers, Small Construction Contractors

Sample text

X. causing burning. The primer charge converts this into a detonation. And this detonation initiates a secondary high explosive base charge. Blasting caps contain highly sensitive and extremely powerful explosives and are sensitive to heat, shock and friction. Obviously, they should always be handled with extreme care! Blasting caps are packed horizontally in cartons of one hundred. Never store or place them open-end up, or otherwise expose them to foreign matter. At best, this could cause a misfire.

Test burn exactly six feet. Suppose the time consumed is 270 seconds. 32 Divide 270 by six to be obtain the average burning rate of 45 seconds per foot. 9 inches. 9 inches, so you’ d probably cut your fuse 6' 8" in length. 33 Making Fuse Primers Fuse primers are trimmed lengths of safety fuse to which a fuse blasting cap has been attached. which is relatively simple. However, this is one of the most important jobs in blasting, because it must be done with great care and attention to detail. Errors or sloppiness can have serious results!

14 13 Side Priming Side Priming. Finished Cartridge. Fig. 15. Side Priming. Notes:- 41 "Top End Priming" Also known as "Top Center Priming", provides a strong tie and a smaller diameter than side-priming, which may be of concern in some loading situations. Fig. 16 "Top End Priming". 1. Punch a hole in the center of the top of the cartridge slightly deeper than the length of the cap. 2. Insert the blasting cap and fuse. 3. Firmly tie the fuse to the cartridge. Loop a string around the cartridge several times and then make a knot.

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