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

The invention provides a method for preparing ammonium nitrate fuel oil explosives with different densities, detonation velocities, and varieties that can be used in the same blast hole without the need for slag interval charging or air-deck charging. The use of these explosives results in savings in unit consumption, uniform detonation energy on rocks, good blasting effect, high construction efficiency, small backfill workload, and reduced surface masses and blasting toe rocks. Additionally, the invention allows for the use of heavy ammonium nitrate fuel oil explosives with higher detonation velocities. The reduced backfill height also ensures the desired effects and reduces 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.