Preparation method of emulsion explosives with different densities, and emulsion explosives with different densities

An emulsion explosive and density technology, applied in the field of explosives, can solve the problems of inability to adjust in a large range, affect the blasting effect, waste the cost of perforation, etc., and achieve the effect of small backfilling workload, saving unit consumption, and less large surface blocks.

Active 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

Due to the narrow density range of the emulsion explosive prepared by the ordinary emulsion explosive preparation method, it cannot be adjusted in a large range according to the change of lithology to meet the needs of different lithologies for different detonation velocities
To meet the energy requirements of different lithologies for explosives, it is necessary to use slag spacers or air spacer charges, which wastes the cost of perforation and wastes man-hours, and the rock is not uniform due to the detonation energy, which affects the blasting effect.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Take 9.8kg of emulsified base, inject 0.32kg of sensitization solution and mix evenly, then add 3.43kg with an average particle size of 2mm and a bulk density of 0.07g / cm 3 The polystyrene foam particles are mixed evenly, loaded into the blast hole and sensitized at 0°C for 15 minutes to prepare the explosive. After measurement, the density is 0.30g / cm 3 , according to GB / T13228-1991 Detonation Velocity Determination Method for Industrial Explosives, the detonation velocity measured by the test is 1502m / s.

Embodiment 2

[0032] Take 10kg of emulsified base, inject 0.1kg of sensitization solution and mix evenly, add 0.01kg with average particle size of 5mm and bulk density of 0.3g / cm 3 The expanded perlite particles are mixed evenly, then loaded into the blast hole, and sensitized at 90°C for 20 minutes to prepare the explosive. After measurement, the density is 1.25g / cm 3 , according to GB / T13228-1991 Detonation Velocity Determination Method for Industrial Explosives, the detonation velocity measured by the test is 4993m / s.

Embodiment 3

[0034] Take 10.2kg of emulsified base, inject 0.3kg of sensitization solution and mix evenly, add 1kg with average particle size of 3mm and bulk density of 0.1g / cm 3 The rice husks were mixed evenly and put into the blast hole, and sensitized at 40°C for 20 minutes to prepare explosives. After measurement, the density is 0.53g / cm 3 , according to the GB / T13228-1991 Detonation Velocity Determination Method for Industrial Explosives, the detonation velocity measured by the test is 2702m / s.

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Abstract

The invention relates to explosives, and especially relates to a preparation method of emulsion explosives with different densities, and emulsion explosives with different densities. According to the emulsion explosive preparation method provided by the invention, a sensitizing solution is added into an emulsion substrate, and density is regulated by adding a physical density regulating agent. The physical density regulating agent is a lightweight insensitive particulate substance with a particle size of 0.5-5mm and preferably 2-4mm, and a bulk density of 0.03-0.30g / cm<3> and preferably 0.1-0.2g / cm<3>. With the emulsion explosive preparation method provided by the invention, emulsion explosive with density of 0.3-1.25g / cm<3> and detonation velocity of 1800-5500m / s can be obtained, such that demands of different lithologies on explosives with different detonation velocities can be satisfied. Also, the emulsion explosive is provided with certain waterproof and moisture-proof performances, such that remands of same water-containing blast-holes on different explosives can be satisfied.

Description

technical field [0001] The invention relates to explosives, in particular to a preparation method of emulsified explosives with different densities and emulsified explosives with different densities. Background technique [0002] There are two types of emulsion explosives prepared by the traditional emulsion explosive preparation method. A common emulsion explosive is mainly composed of an emulsion matrix, and the other is a heavy emulsion explosive mainly mixed with an emulsion matrix and porous granular ammonium nitrate, wherein the heavy emulsion explosive The content of the emulsion matrix in the medium is at least 50% (weight fraction) of the heavy emulsion explosive. The density of 1.05-1.30g / cm can only be obtained by the traditional emulsion explosive preparation method 3 Ordinary emulsion explosives and heavy emulsion explosives with better blasting effect, when the explosive chemical sensitization density is lower than 1.05g / cm 3 When the explosive energy decreas...

Claims

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Application Information

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