Powdery emulsion explosive for blasting granite mine and preparation method of powdery emulsion explosive

Abstract

The invention discloses a powdery emulsion explosive for blasting a granite mine. The powdery emulsion explosive is prepared by mixing 65-70 parts by weight of powdery rock emulsion explosive, 25-30 parts by weight of sodium chloride and 5-10 parts by weight of perlite, wherein the powdery rock emulsion explosive is prepared by blending 80-85 wt% of ammonium nitrate, 5-10 wt% of sodium nitrate, 4-4.5 wt% of water, 1-1.5 wt% of an emulsifier and 4.5-5 wt% of wax special for emulsification. The proportion and the production process of the original powdery emulsion explosive are changed by adding other substances such as table salt and perlite into the original powdery emulsion explosive, the powdery emulsion explosive accounts for 65-70%, the other substances account for 30-35%, and the density and the blasting performance of the original powdery emulsion explosive are reduced. The forming is goodafter blasting,the lumpiness is large, and the requirements of users are met. The powdery emulsion explosive has the advantages of high granite ore utilization rate, low mining cost, less waste material and environmental pollution reduction.

Description

technical field [0001] The invention relates to the technical field of blasting in granite mines, in particular to a powdery emulsion explosive for blasting in granite mines and a preparation method thereof. Background technique [0002] Ordinary industrial explosives with detonator sensitivity are mainly composed of water-phase materials containing ammonium nitrate and sodium nitrate and oil-phase materials containing emulsifiers, paraffin, vaseline and other oil substances. The density is generally 0.95-1.18g / cm3. After blasting, the detonation sensitivity is high, the blasting power is high, and the lumpiness after blasting is small, which is not suitable for granite mining. [0003] Granite mining needs to break the rock mass working face, and the larger the block size after mining, the better. Therefore, the demand for low detonation velocity and low intensity explosives for open-pit granite mining is increasing. The special explosive for granite is a combination of emu...

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Problems solved by technology

Adding No. 1 and No. 2 agents together in the blasting operation has potential safety hazards, and at the same time, a large amount of sulfur dioxide is produced after the explosion, which pollutes the environment. Due to the potential safety hazards in the blasting operation of the stone cracking agent used for the original mining of granite, the country has banned it at present.

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