Preparation method of explosives with differrnt densities and explosives with different density

Abstract

Disclosed are explosives, especially a preparation method for explosives of different densities and explosives of different densities. The method adjusts physical density by adding granular form physical density adjusting agent with 0.5-5.0 mm grain diameter and 0.03-0.30 g / cm3 bulk density when preparing explosives. The method can adjust the explosive's density within a large range to produce the explosives with a wide range of detonation velocity to meet different needs for explosive velocity according to different lithology, and simultaneously meet needs for different explosives in the same blasthole.

Description

[0001]The application claims priority of the following Chinese patent applications:[0002]1. Chinese patent application No. 201210002199.2, filed with Chine Patent Office on Jan. 5, 2012, entitled “Preparation Method of Emulsion Explosives with Different Densities and Emulsion Explosives with Different Densities”.[0003]2. Chinese patent application No. 201210002098.5, filed with Chine Patent Office on Jan. 5, 2012, entitled “Preparation Method of Ammonium Nitrate Fuel Oil Explosives with Different Densities and Ammonium Nitrate Fuel Oil Explosives with Different Densities”.FIELD OF THE INVENTION[0004]The invention relates to explosives, in particular to a preparation method of explosives with different densities and explosives with different densities.BACKGROUND OF THE INVENTION[0005]Generally, traditional explosives have a relatively narrow density range. However, due to different rock properties, different rocks need different detonation velocities of the explosives. Generally, the...

AI Technical Summary

Benefits of technology

[0047](3) Compared with the way of adopting slag interval charging or air-deck charging to adjust the detonation velocity of the ammonium nitrate fuel oil explosives to adapt to the requirements of different lithologies for different detonation velocities, the unit consumption is saved, the detonation energy acted on rocks is uniform, the blasting effect is good, the construction efficiency is high, the backfill workload is small, surface masses are few, and blasting toe rocks are few.

[0048](4) A variety of porous granular ammonium nitrate fuel oil explosives which have the density of 0.3-0.95 g / cm3 and further obtain the detonation velocity of 1600-3600 m / s and a variety of heavy ammonium nitrate fuel oil explosives which have the density of 0.3-1.25 g / cm3 and further obtain the detonation velocity of 1800-5000 m / s can be prepared through the preparation methods of the explosives of the invention, the requirements of different lithologies of the explosives for different detonation velocities can be met, and the requirements of different explosives in a same blast hole can be met.

[0049](5) By adopting the ammonium nitrate fuel oil explosives of the invention, the explosives with different densities, different detonation velocities and different varieties can be loaded into the same blast hole, slag interval charging or air-deck charging is not required in the process, the backfill height can be reduced to 20-23 times, and the backfill height is the most reasonable backfill height; and compared with the backfill height for the aperture length of 30-33 times in the prior art, the backfill height not only ensures the effects, but also reduces the surface masses.

Problems solved by technology

As the explosives prepared by the common explosive preparation method have the relatively narrow density range, the large-range regulation cannot be performed according to lithological changes to meet the requirements of different lithologies for different detonation velocities.

To meet the requirements of the different lithologies for explosive energy, Slag interval charging or air-deck charging needs to be adopted, so that the perforation cost is wasted and the working time is wasted; and furthermore, detonation energy acted on the rocks is non-uniform, so that the blasting effect is affected.