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US 5,470,407 AGranted
Method of varying rate of detonation in an explosive composition
AssigneeNelson Brothers, Inc.
InventorsGeorge L. Griffith, Ricky T. Vance
Life of this patent
Estimating the term…
Abstract
Provided herewith is a method for preparing an explosive composition with an adjusted rate of detonation which matches the rock stratum in which blasting is to occur. The composition is comprised of a mixture of glass microballoons and plastic spheres, which mixture has been found to provide one with adjustable rates of detonation with essentially no significant difference in the carbon, hydrogen, oxygen, nitrogen and water contents or ratios and at the same time with the same overall energy.
Claims12
A process of making an explosive composition, which comprises
- (1) determining the desired rate of detonation, and
- (2) formulating a water-in-oil explosive emulsion by combining a water immiscible organic fuel continuous phase, emulsified aqueous inorganic oxidizer salt solution discontinuous phase, emulsifier, and mixture of glass and plastic microspheres, with the mixture of glass and microspheres being adjusted to provide the desired rate of detonation.
A method for blasting which comprises
- (1) determining the rock sonic velocity of the rock stratum to be blasted
- (2) and preparing a water-in-oil explosive emulsion by mixing therein a sensitizer comprised of a mixture of glass and plastic hollow spheres, with the particular mixture of glass and plastic hollow spheres providing a rate of detonation which matches the sonic velocity of the rock.
Dependencies are inferred from the claim text.