| 摘要 |
A blasting composition is disclosed which consists of at least 50% by weight of a solid particulate and undissolved nitrate oxidizer salt, usually ammonium nitrate prills (AN), and 10 to 40% by weight of a dense water-in-oil emulsion, mixed into the granular material to partially but not completely fill the interstices between the granule, giving the composition enough density that it will sink in water filled boreholes but not making it so dense that it will not detonate. The composition contains up to 10% by weight of oil as a fuel, part of which may be mixed with the dry granules before the emulsion. a greasy water-repellant material, is mixed into the undissolved oxidizer. The presence of air or gas in the interstices increases sensitivity of the composition to detonation while its density, greater than that of conventional dry ammonium nitrate-fuel mixtures (ANFO) provides it with greater blasting energy. |
