2 results about "ANFO" patented technology

The invention relates to the field of blasting and can be used for more efficiently extracting fossils fuels, metallic and non-metallic minerals, hydrominerals, gemstones and chemical minerals. A method for producing a dilatancy effect on producing formations comprises laying ANFO explosive charges on the surface of the ground or in holes at a distance from one another, and detonating said charges with a delay from one to the next. The number of explosive charges is equal to two or more, and the mass of the individual charges may be the same or different but sufficient to produce a dilatancy effect. If the number of charges laid is more than two, the delays between the detonations may be the same or different. The technical result is that of improving the efficiency of mineral extraction.

The invention belongs to the technical field of ammonium nitrate fuel oil explosives, and particularly relates to an ammonium nitrate fuel oil explosive and a preparation method thereof. The ammonium nitrate fuel oil explosive comprises an oil-phase-like material, granular ammonium nitrate and a density adjusting material, wherein the density adjusting material is polymer foam; in terms of the ammonium nitrate fuel oil explosive, the content of the oil-phase-like material is 5-30 wt%, the content of the granular ammonium nitrate is 55-90 wt%, and the content of the density adjusting material is 2-15 wt%; the density of the ammonium nitrate fuel oil explosive is 0.30-0.75 g / cm < 3 >; through the synergistic effect of the oil-phase-like material, the granular ammonium nitrate and the density adjusting material in specific dosage, the explosive has proper density and detonation velocity, and the low explosive return rate and the long storage period can be guaranteed.