Mining in Manitoba |
Blasting Theory |
Mining Systems |
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1) Strength of the explosive should be proportional to the resistance of the rock. 2) The burden should be properly proportioned to the strength of the explosive and the resistance of the rock. 3) Blasting of the rock to leave 2 or more faces will require a smaller quantity of explosives than if only 1 free face is left by preceeding blast. 4) It is more economical to break to a system of regular faces and benches than to blast in an irregular manner 5) Where possible, the simultaneous firing of several shots grouped closely together often requires less powder than if shots are fired singly. 6) No more explosive should be used than is required to break rock to the proper size and leave it in the best position for handling. In most mining operations, explosives are placed in drill holes. If explosives are placed in a drill hole and detonated, the result is usually a crater of varying size.
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Black Powder
Liquid Oxygen
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