Ammunition and explosives – Blasting – Patterned blasting
Patent
1992-01-29
1993-11-16
Nelson, Peter A.
Ammunition and explosives
Blasting
Patterned blasting
102313, 149 92, F42B 300, C06B 2534
Patent
active
052613275
ABSTRACT:
A method of quarry blasting is provided wherein boreholes are loaded with alternating layers of ANFO and AP propellant. A primary charge is used to detonate the composition column. The low velocity propellant enhances the ANFO explosion, and produces high pressure gas and high temperatures for breaking and casting the rock, while minimizing fly rock, ground vibrations, and air noise.
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