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Preparation method of ammonium nitrate fuel oil explosives with different densities, and ammonium nitrate fuel oil explosives with different densities

An ammonium explosive and density technology, applied in the field of explosives, can solve the problems of uneven, unsatisfactory, and high unit consumption of rocks, and achieve the effects of uniform detonation energy on rocks, reduction of large blocks on the surface, and low blasting cost.

Inactive Publication Date: 2013-07-10
QINGDAO TARGET MINING SERVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The traditional on-site mixed ammonium oil explosives are divided into porous granular ammonium oil explosives and heavy ammonium oil explosives. Porous granular ammonium oil explosives are not only not waterproof and moisture-proof, but must take moisture-proof measures or replace explosives in case of water-containing blastholes and wet blastholes. Variety or packaged emulsion explosives, resulting in high unit consumption, and the density of this explosive is 0.85-0.95g / cm 3 , the detonation velocity is 2600-3600m / s, and the range of density and detonation velocity is narrow, which cannot meet the requirements of different lithology changes for different detonation velocity
Although heavy ammonium oil explosives have certain moisture-proof and waterproof capabilities, their density is 0.95-1.35g / cm 3 , the detonation velocity is generally 2800-5000m / s, which cannot meet the requirements of different lithology changes for different detonation velocities
In order to meet the requirements of different lithologies for different detonation velocities of explosives, the use of the above two types of explosives requires slag interval charge or air interval charge, which wastes the cost of perforation and wastes man-hours, and because the rock is not uniform due to the detonation energy, it affects the blasting effect, and the explosives in the same blasthole cannot be selected for any variety

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Preparation of porous granular ammonium explosive:

[0036] Take 9.35kg of porous granular ammonium nitrate and 0.65kg of diesel oil and mix well, then add 0.01kg to the mixture of porous granular ammonium nitrate and diesel, particle size 0.5mm, bulk density 0.03g / cm 3 Expanded perlite particles, mixed evenly to prepare porous granular ammonium explosive. The density is determined to be 0.9g / cm 3 ; According to the GB / T13228-1991 industrial explosives detonation velocity measurement method, the explosive detonation velocity in this embodiment measured by the test is 3302m / s.

Embodiment 2

[0038] Preparation of porous granular ammonium explosive:

[0039] Take 9.55kg porous granular ammonium nitrate, 0.45kg diesel, 3.5kg particle size 2.3mm, bulk density 0.12g / cm 3 The polystyrene foam particles are mixed uniformly to prepare a porous granular ammonium explosive. The density is determined to be 0.30g / cm 3 ; According to the GB / T13228-1991 industrial explosives detonation velocity measurement method, the explosive detonation velocity in this embodiment measured by the test is 1633m / s.

Embodiment 3

[0041] Preparation of porous granular ammonium explosive:

[0042] Take 9.45kg of porous granular ammonium nitrate and 0.55kg of diesel oil and mix evenly, then add 1.5kg to the mixture of porous granular ammonium nitrate and diesel, particle size 5mm, bulk density 0.3g / cm 3 The rice husks are mixed uniformly to prepare porous granular ammonium explosives. The density is determined to be 0.71g / cm 3 ; According to the GB / T13228-1991 Industrial Explosive Detonation Velocity Measurement Method, the explosive detonation velocity in this embodiment measured by the test is 3306m / s.

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Abstract

The invention relates to explosives, and especially relates to a preparation method of ammonium nitrate fuel oil explosives with different densities, and ammonium nitrate fuel oil explosives with different densities. According to the invention, density is regulated by adding a particulate physical density regulating agent with particle size of 0.5-5.0mm and a bulk density of 0.03-0.30g / cm<3> during an ammonium nitrate fuel oil explosive preparation process. With the method, the density of porous particulate ammonium nitrate fuel oil explosive can be regulated to 0.3-0.95g / cm<3>, such that a porous particulate ammonium nitrate fuel oil explosive with detonation velocity of 1600-3600m / s can be obtained; or the density of heavy ammonium nitrate fuel oil explosive can be regulated to 0.3-1.25g / cm<3>, such that a heavy ammonium nitrate fuel oil explosive with detonation velocity of 1800-5000m / s can be obtained. Therefore, demands of different lithologies on different explosive detonation velocities can be satisfied, and demands of different blast-holes on different explosives can be satisfied.

Description

Technical field [0001] The invention relates to explosives, in particular to a method for preparing ammonium explosives with different densities. Background technique [0002] The traditional on-site mixed ammonium explosives are divided into porous granular ammonium explosives and heavy ammonium explosives. The porous granular ammonium explosives are not waterproof and moisture-proof. When there are water-containing blastholes and wet blastholes, moisture-proof measures must be taken or the explosives must be replaced. Varieties or packaging emulsion explosives, resulting in high unit consumption, and the explosive density is 0.85-0.95g / cm 3 , The detonation velocity is 2600-3600m / s, and the density and detonation velocity range are narrow, which cannot meet the requirements of different lithology changes for different detonation velocity. Although heavy ammonium explosives have certain moisture and water resistance, the density is 0.95-1.35g / cm 3 , The detonation speed is gener...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B31/28C06B23/00
CPCC06B23/003
Inventor 薛世忠
Owner QINGDAO TARGET MINING SERVICES
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