High-power class-3 coal mine permissible water-gel explosive and production method thereof

A water-gel explosive and powerful technology, applied in explosives and other directions, can solve problems such as secondary explosion, and achieve the effects of high safety, stable explosive performance and lowering of ambient temperature

Inactive Publication Date: 2015-05-20
淮北矿业控股股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there have been reports on the development of high-power coal mine water-gel explosives in China. For example, the high-power coal mine water-gel explosives of Anhui University of Science and Technology, application number: 201210450704. Explosive power and alkali metal halides can be used to quickly reduce the sensitivity of water-gel explosives, but metal aluminum powder is prone to secondary explosions in high gas and coal dust environments, and is generally not used in high gas mine blasting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A kind of high-power three-level coal mine water-gel explosive, the explosive includes the following substances in weight percentage: 25 parts of ammonium nitrate solution with a concentration of 72%, 40 parts of methylamine nitrate solution with a concentration of 86%, 14 parts of solid ammonium nitrate, 10 parts of sodium nitrate, 1.2 parts of safflower powder, 0.2 parts of crosslinking agent, 3 parts of expanded perlite, 6 parts of calcium carbonate powder, and 0.04 parts of potassium iodide;

[0053]According to the above-mentioned components and content, the high-power high-safety coal mine water-gel explosive of the present invention is made according to the following preparation steps,

[0054] The specific operation steps are as follows:

[0055] a. Dilute the high-concentration ammonium nitrate solution with water to a concentration of 72%, and keep it warm at 65~75°C for later use;

[0056] b. The prepared 86% methylamine nitrate solution is kept warm and he...

Embodiment 2

[0061] A high-power third-grade coal mine permitted water-gel explosive, said explosive comprising the following substances in weight percentage: 32 parts of ammonium nitrate solution with a concentration of 81%, 38 parts of methylamine nitrate solution with a concentration of 83%, 10 parts of solid ammonium nitrate, 9 parts of sodium nitrate, 1.3 parts of fennel powder, 0.3 parts of potassium pyroantimonate solution, 2.4 parts of expanded perlite, 7 parts of calcium carbonate powder, and 0.03 parts of potassium iodide;

[0062] According to the above-mentioned components and content, according to the specific operation steps of Example 1, the water-gel explosive with high power and high safety allowed in coal mines is produced.

[0063] Performance test results: explosive density 1.07g / cm 3 ,, the detonation velocity is 3456m / s, the intensity is 13.5mm, the detonation distance is 4cm, the working capacity is 2612ml, and the gas safety half test dose is ≥400g.

example 3

[0065] A high-power third-grade coal mine permitted water gel explosive, the explosive includes the following substances in weight percentage: 30 parts of ammonium nitrate solution with a concentration of 74%, 37 parts of methylamine nitrate solution with a concentration of 85%, 12 parts of solid ammonium nitrate, 12 parts of sodium nitrate, 1.1 parts of fennel powder, 0.3 parts of potassium pyroantimonate solution, 2.6 parts of expanded perlite, 9 parts of calcium carbonate powder, and 0.02 parts of potassium chloride;

[0066] According to the above-mentioned components and content, according to the specific operation steps of Example 1, the water-gel explosive with high power and high safety allowed in coal mines is produced.

[0067] Performance test results: explosive density 1.05g / cm 3 ,, the detonation velocity is 3307m / s, the intensity is 12.9mm, the detonation distance is 5cm, the working capacity is 2589ml, and the gas safety half test dose is ≥400g.

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Abstract

The invention provides a high-power class-3 coal mine permissible water-gel explosive. The explosive is prepared from the following substances in parts by weight: 25-32 parts of an ammonium nitrate solution having the concentration of 72%-82%, 35-40 parts of a methylamine nitrate solution having the concentration of 83%-86%, 9-15 parts of solid ammonium nitrate, 8-12 parts of sodium nitrate, 0.8-1.5 parts of a gelatinizing agent, 0.1-0.3 part of a cross-linking agent, 2-4 parts of a sensitizer and 5-10 parts of a flame inhibitor, as well as 0.02-0.04 part of a high-performance flame inhibitor. The production method of the explosive comprises the following steps: firstly, preparing the methylamine nitrate solution and the ammonium nitrate solution, then orderly adding the methylamine nitrate solution, the ammonium nitrate solution, the solid ammonium nitrate, the sodium nitrate, the gelatinizing agent, the flame inhibitor, the sensitizer and on the like to a mixing tank, and adjusting the density to the range of 1.05-1.15g / cm<3> and controlling the pH value within the range of 5.0-5.8 after mixing evenly; next, adding the cross-linking agent, thereby obtaining the high-power class-3 coal mine permissible water-gel explosive. The production method of the high-power class-3 coal mine permissible water-gel explosive has the advantages of simple production process and low production cost; the explosive is stable in performance, the coal mine gas safety is high, the explosive capacity is big, and the blasting operation effect is improved.

Description

technical field [0001] The invention relates to an explosive, in particular to a permitted water-gel explosive used in high-power tertiary coal mines and a manufacturing method thereof. Background technique [0002] Coal mine type water gel explosive is a kind of water-containing explosive. Due to its unique water resistance and high gas safety performance, coal mine type water gel explosive is widely used in coal mine underground operations in environments containing gas and coal dust. The safety of coal mine type explosives is divided into Level, level two and level three, among which level three coal mines have the highest safety level and the least explosive power. The existing level three coal mine water-gel explosives have a combustible gas safety index that is far higher than the national standard requirements, and other types of explosives are far from comparable , water-gel explosives have been comprehensively and mandatoryly promoted and used underground in coal mi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B31/28
Inventor 郭爱清何家林车美玲武秀梅鲁强张泽峰
Owner 淮北矿业控股股份有限公司
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