 | 1840 - 644 Seiten
...the surface, if the mass exposed to the action of the explosion be of equal consistence throughout. Charges of powder, to produce similar proportionate...be as the cubes of the lines of least resistance. Thus, if 4oz. of powder would just have a given effect upon a solid piece of rock of 2 feet thick,... | |
 | Cyclopaedia - 1852 - 258 Seiten
...in the air. This need not necessarily be the shortest line to the surface; as, for instance, a Jong line in earth may, from the same charge, afford less...according to any fanciful depth of hole bored. Thus, if 4 oz. of powder would have a given effect upon a solid piece of rock of 2 feet thick to the surface,... | |
 | Charles Knight - 1866 - 526 Seiten
...bored as by the length of the line of least resistance, or the thickness of the rock to be blasted. Charges of powder, to produce similar proportionate...be as the cubes of the lines of least resistance. In the larger class of explosions advantage may usually be taken of fissures in the rock, to economise... | |
 | Julius George Medley - 1873 - 942 Seiten
...resistance than a shorter line in rock. Supposing the material in wliich the explosion is to take place, be of uniform consistence in every direction, charges...hole bored. Thus, if 4 ounces of powder would have n given effect upon a solid piece of rock of 2 feet thick to the surface, it ought to require 13 j... | |
 | J. E. Shields - 1877 - 172 Seiten
...as for instance, a long line in earth may from the same charge afford less resistance than a short line in rock. Supposing the matter in which the explosion...to be as the cubes of the lines of least resistance : thus, if 4 oz. of powder would have a given effect upon a solid piece of rock 2 ft. thick to the... | |
 | J. E. Shields - 2002 - 150 Seiten
...as for instance, a long line in earth may from the same charge afford less resistance than a short line in rock. Supposing the matter in which the explosion...to be as the cubes of the lines of least resistance : thus, if 4 oz. of powder would have a given effect upon a solid piece of rock 2 ft. thick to the... | |
 | Great Britain. Parliament. House of Commons - 1853 - 628 Seiten
...the surface, if the mass exposed to the action of the explosion be of equal consistence throughout. Charges of powder, to produce similar proportionate...be as the cubes of the lines of least resistance. Thus, if 4 oz. of powder would just have a given effect upon a solid piece of rock of 2 feet thick,... | |
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... powder will find the least opposition to its vent in the air. This need not necessarily be the shortest line to the surface; as, for instance, a long line in earth may, from the same charge, afford less resistance than a shorter line in rock. Supposing... 