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US 4,543,136 AGranted
Water-in-oil emulsion explosive composition
AssigneeNippon Oil and Fats Co., Ltd.
InventorsKohji Edamura, Akio Torii, Katsuhide Hattori, Hiroshi Sakai
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Abstract
A gas-retaining agent having a particle size of 177-3,000 .mu.m is effective for improving the safety of water-in-oil emulsion explosive compositions against methane and coal dust and for improving the sympathetic detonability of the explosive compositions without deteriorating their strength.
Claims4
A water-in-oil emulsion explosive composition comprising:
- a continuous phase consisting of a carbonaceous fuel component;
- a disperse phase consisting of an aqueous solution of inorganic oxidizer salt;
- and
- an emulsifier and a gas-retaining agent, wherein at least 30% by volume of said gas-retaining agent has a particle size of 600-3,000 .mu.m.
1 more element
Dependencies are inferred from the claim text.