Low-temperature-resistant high-power coalmine-permitted water-gel explosive and manufacturing method thereof

A water-gel explosive, low-temperature resistant technology, applied in explosives and other directions, can solve the problem of no relevant reports, and achieve the effects of ensuring gas safety, improving frost resistance, and improving performance.

Inactive Publication Date: 2013-09-25
安徽理工大学爆破工程与器材研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no relevant report on the permissible water-gel explosives in low-temperature resistant and high-power coal mines.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] It can detonate normally in the range of -20°C, and the explosive power is greater than 26m (ballistic throwing method). The high-power emulsion explosive is allowed for low-temperature resistant coal mines. The selected components and mass ratio are: the concentration is 84% ​​methylamine nitrate solution 34, water 10. Ammonium nitrate 29, sodium nitrate 12, formamide 2, urea 2, sodium dodecylbenzene sulfonate 0.3, turmeric powder 0.9, fine atomized aluminum powder 0.8, composite alkali metal halide flame suppressant 6, expansion Perlite powder 2.4, bubble stabilizer 0.1, crosslinking agent 0.1.

[0027] According to the above-mentioned components and content, the low-temperature-resistant high-power coal mine permissible water-gel explosive of the present invention is made through the following preparation steps:

[0028] Step 1: Heat the MMAN solution to 65-75°C, measure the concentration of MMAN, and set aside;

[0029] Step 2: Dissolve part of ammonium nitrate and...

Embodiment 2

[0035] It can detonate normally in the range of -20 ℃, and the explosion power is greater than 25m (ballistic throwing method). The low-temperature resistant coal mine allows high-power emulsion explosives. The selected components and mass ratio are: methylamine nitrate 34.66, water 10.95, ammonium nitrate 28.55 , sodium nitrate 15.4, formamide 2, urea 2, sodium dodecylbenzene sulfonate 0.3, kale powder 0.95, fine atomized aluminum powder 0.5, composite alkali metal halide flame suppressant 6 (KCl 2.5, NH4Cl 3.5 ), expanded perlite powder 2.4, bubble stabilizer 0.1, crosslinking agent 0.1.

[0036] According to above-mentioned components and content, according to the preparation procedure of embodiment 1, both can manufacture above-20 ℃, the high-power emulsified explosive that the explosion power is greater than 26m (ballistic throwing method) is allowed in low temperature coal mine.

Embodiment 3

[0038]It can detonate normally in the range of -15°C, and the explosive power is greater than 27m (ballistic throwing method). The low-temperature resistant coal mine allows high-power emulsion explosives. The selected components and mass ratio are: methylamine nitrate 33.80, water 11.35, ammonium nitrate 25 , sodium nitrate 15.4, formamide 1.5, urea 1.5, sodium dodecylbenzene sulfonate 0.3, kale powder 0.9, fine atomized aluminum powder 0.6, composite alkali metal halide flame suppressant composite alkali metal halide flame suppressant 6 (of which KCl 3, NH4Cl 3), expanded perlite powder 2.4, bubble stabilizer 0.1, crosslinking agent 0.1.

[0039] According to above-mentioned components and content, according to the preparation steps of embodiment 1, both can manufacture above-20 ℃, the high-power emulsified explosive that the explosion power is greater than 27m (ballistic throwing method) is allowed in low-temperature coal mine.

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Abstract

The invention relates to a low-temperature-resistant high-power coalmine-permitted water-gel explosive and a manufacturing method thereof. The explosive is composed of a methylamine nitrate solution, water, ammonium nitrate, sodium nitrate, formamide, urea, sodium dodecylbenzenesulfonate, sesbania powder, fine atomized aluminum powder, a composite alkali metal halide flame inhibitor, expanded perlite powder, a foam stabilizer and a crosslinking agent. According to the invention, sodium nitrate and sesbania powder are first well mixed; ammonium nitrate is dissolved in water, such that an ammonium nitrate solution is prepared; formamide is dissolved in the methylamine nitrate solution; the three are mixed in an agent mixing tank; the composite alkali metal halide flame inhibitor, the fine atomized aluminum powder, the expanded perlite powder, the foam stabilizer and the crosslinking agent are sequentially added; and the mixture is well mixed and is packaged into sticks. The explosive has high explosion power, and can be normally initiated and detonated under an experimental temperature of 0 DEG C to -20 DEG C. The explosive does not contain toxic component, and does not pollute the environment. The process is simple, and continuous production can be realized.

Description

Technical field: [0001] The invention relates to a new formulation and manufacturing method of low-temperature-resistant coal mine permissible water-gel explosives, which can be used in blasting operations in cold regions with an ambient temperature above -20°C or in other low-temperature environments, especially in blasting at low temperatures. It is used for crushing medium-hard and above rocks on the working face with high gas outburst and coal dust explosion hazards. Background technique: [0002] Water-gel explosives have strong water resistance, high density, high power, safe production and use, especially can be made into small-diameter (below 50mm) coils, and are an excellent mine blasting drug. At present, my country's existing third-level and second-level Inert marble powder (CaCO3) is basically used in the formula of water-gel explosives allowed in high-grade coal mines as a flame suppressant for the explosion reaction of explosives to coal mine gas, but the inhibi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B31/32
Inventor 颜事龙
Owner 安徽理工大学爆破工程与器材研究所
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