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Emulsion explosive permissible in grade-three coal mine

A technology of emulsified explosives and coal mines, applied in explosives, non-explosive/non-thermal agent components, offensive equipment, etc., to achieve good foam-fixing ability, obvious effect, and strong water resistance

Inactive Publication Date: 2016-07-06
雅化集团旺苍化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to meet the above conditions, the existing three-level coal mine permitted emulsion explosives have made a corresponding compromise on the combination of emulsifiers, flame suppressants and sensitizers, so that the explosion of the three-level coal mine permitted emulsion explosives produced will have a negative impact on the underground mines. The explosion suppression safety of explosives meets the requirements, but the guarantee period is only 120 days

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Ammonium nitrate 70.0~80.0 parts

[0028] Sodium nitrate 7.0~11.0 parts

[0029] 7.5~11.0 parts of water

[0030] Sodium chloride 6-10 parts

[0031] Microcrystalline wax 1.2~1.5 parts

[0032] Continuous phase 3.5~4.8 parts

[0033] Emulsifier 2~2.5 parts

[0034] Sensitizer 0.3~0.6 parts.

[0035] The continuous phase is selected from one or more mixtures of conventional three-line oil, vacuum distillate oil, vacuum wax paste, residue wax paste, light deasphalted oil, and heavy deasphalted oil.

[0036] Described emulsifying agent is made by following method:

[0037] In terms of weight percentage, take 60% sorbitan monooleate and 5% polyacrylamide, mix and heat to 75°C, then add 35% soybean lecithin and stir at 75°C for 3 hours to compound to obtain an emulsifier.

[0038] The sensitizer is prepared by mixing N,N-dinitrosopentamethylenetetramine and water in a mass ratio of 1:2.

[0039] Preparation of permitted emulsion explosives for tertiary coal mines:

...

Embodiment 2

[0048] Preparation of permitted emulsion explosives for tertiary coal mines:

[0049] Preparation of emulsifier: by weight percentage, take 60% sorbitan monooleate and 5% polyacrylamide, mix and heat to 75°C, then add 35% soybean lecithin and stir at 75°C for 3 hours to compound That is the emulsifier.

[0050] Preparation of sensitizer: mix N,N-dinitrosopentamethylenetetramine with water at a mass ratio of 1:2 to prepare a sensitizer.

[0051] Water phase preparation: Mix and heat 7500g of ammonium nitrate, 900g of sodium nitrate, 80g of sodium chloride and 95g of water to form an oxidant water phase, heat at 110°C and keep it warm for 35 minutes to obtain a water phase solution;

[0052] (2) Preparation of oil phase: Mix and heat 13g of microcrystalline wax, 41g of vacuum distillate oil and 22g of emulsifier to form a combustible oil phase; heat at 90°C and hold for 30 minutes to obtain an oil phase liquid;

[0053] (3) Emulsification: add the water phase solution and the ...

Embodiment 3

[0057] Preparation of permitted emulsion explosives for tertiary coal mines:

[0058] Preparation of emulsifier: by weight percentage, take 60% sorbitan monooleate and 5% polyacrylamide, mix and heat to 75°C, then add 35% soybean lecithin and stir at 75°C for 3 hours to compound That is the emulsifier.

[0059] Preparation of sensitizer: mix N,N-dinitrosopentamethylenetetramine with water at a mass ratio of 1:2 to prepare a sensitizer.

[0060] Water phase preparation: mix and heat 8000g ammonium nitrate, 1100g sodium nitrate, 100g sodium chloride and 110g water to form an oxidant water phase, heat at 110°C and keep it warm for 35 minutes to obtain a water phase solution;

[0061] (2) Oil phase preparation: Mix and heat 15g of microcrystalline wax, 48g of residual oil wax paste, and 25g of emulsifier to form a combustible oil phase; heat at 90°C and hold for 30 minutes to obtain an oil phase liquid;

[0062] (3) Emulsification: add the water phase solution and the oil phase ...

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PUM

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Abstract

The invention provides an emulsion explosive permissible in a grade-three coal mine. The emulsion explosive is prepared from the following components: ammonium nitrate, sodium nitrate, water, sodium chloride, microcrystalline wax, a continuous phase, an emulsifier and a sensitizing agent. With aqueous solutions of oxidizing agents like ammonium nitrate and a flame eliminating agent as dispersion phases and a special hydrocarbon (such as diesel fuel fraction, vacuum distillate oil, pressure-reduced cerate, residuum cerate, light deasphalted oil and heavy deasphalted oil) as a continuous phase, the emulsion explosive is prepared by carrying out emulsification under the action of a surfactant (an emulsifier) for formation of water-in-oil type emulsion colloid and then carrying out chemical sensitization. The emulsion explosive has good explosion performance, good security, small amount of fume, hard and non-sticky body, good water resistance, and small changing amplitude of indexes before an expriation data. The emulsion explosive is applicable to explosion of a high-gas mine, a high-gas area in a low-gas mine and a working face with the dangers of coal (rock) and gas outburst.

Description

technical field [0001] The invention relates to a permitted emulsion explosive for third-grade coal mines. Background technique [0002] Emulsion explosives allowed in coal mines are widely used in coal mining blasting projects. In view of the characteristics of dangerous and explosive substances such as gas and coal dust in coal mines, it is required that in addition to considering the explosive performance of explosives in coal mines, special When considering the blasting operation, the explosion suppression safety of explosive explosion on underground explosives. In order to meet the above conditions, the existing three-level coal mine permitted emulsion explosives have made a corresponding compromise on the combination of emulsifiers, flame suppressants and sensitizers, so that the explosion of the three-level coal mine permitted emulsion explosives produced by it will have a negative impact on underground mines. The explosion suppression safety of explosives meets the ...

Claims

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Application Information

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IPC IPC(8): C06B31/32C06B23/00
Inventor 李飞李文乾陈晓霞张永燕
Owner 雅化集团旺苍化工有限公司
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