Rock Blasting A Practical Treatise on the Means Employed in Blasting Rocks for Industrial Purposes

_Drills._--The operations of blasting consist in boring suitable holes in the rock to be dislodged, in inserting a charge of some explosive compound into the lower portion of th...

_Nature of an Explosion._--The combination of oxygen with other substances for which it has affinity is called generally “oxidation.” The result of this combination is a new sub...

_Hand Boring._--When the positions and the directions of the shot-holes have been determined, the operations of blasting are begun by striking a few blows with the hammer upon t...

_Preparation of the Charge._--It is essential to the success of subaqueous blasting operations, that the explosive substance used should be suitable to the conditions under whic...

_Line of Least Resistance._--The pressure of a fluid is exerted equally in all directions; consequently the surrounding mass subjected to the force will yield, if it yield at al...