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High-safety emulsion explosive for coal mine

An emulsion explosive, high-safety technology, applied in explosives and other directions, can solve the problems of ammonium ladder explosives easy to absorb moisture and agglomerate, affect safe use, and have poor water resistance, so as to ensure the safety of coal mine production and enhance the ability to resist deflagration. , the effect of improving the detonation sensitivity

Active Publication Date: 2013-05-15
CHINA COAL TECH & ENG GRP HUAIBEIBLASTING TECHN RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The powdered ammonium antimony explosives allowed in coal mines have weak water resistance and low safety, and more than 10% TNT must be added to this ammonium nitrate explosive to ensure its explosive performance. TNT is a toxic elemental explosive. It pollutes the environment and endangers human health. In addition, ammonium nitrate has strong hygroscopicity and agglomeration, which leads to the disadvantages of ammonium ladder explosives allowed in coal mines that are easy to absorb moisture and agglomerate, which seriously affects safe use. The same type of coal mines are allowed to be replaced by emulsion explosives; although water gel explosives have the advantages of simple production process, high safety performance of combustible gas, high power, good water resistance, and good blasting effect in water holes, the main raw material of water gel explosives is The price is high, the output is small, and its safety level can reach the third level at most; the source of raw materials of emulsion explosives is wide, the cost is low, and it does not contain TNT which is harmful to human body, and it is in line with the planning direction of the national civil explosive product industry development. It also has the advantages of good explosive performance, strong water resistance, reliable detonation, less toxic gas produced after explosive explosion, which is beneficial to reduce the physical harm to underground production operators and high safety in use, and has become the most promising coal mine explosive in China at present. safety explosives, but the highest level of safety for emulsion explosives currently used in coal mines in China is level three, compared with foreign countries, its safety level can at most reach the foreign medium safety level

Method used

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  • High-safety emulsion explosive for coal mine
  • High-safety emulsion explosive for coal mine
  • High-safety emulsion explosive for coal mine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Emulsion explosives for high-safety coal mines are made from the following raw materials in parts by weight:

[0029]

[0030]

[0031] The composite flame suppressant is composed of potassium chloride and ammonium chloride, potassium chloride 11.0kg, ammonium chloride 2.0kg;

[0032] The composite emulsifier is composed of sorbitan monooleate (SP-80) and soybean lecithin, 2.3kg of sorbitan monooleate and 0.5kg of soybean lecithin;

[0033] The composite oil phase is composed of paraffin, petrolatum, machine oil and chlorinated paraffin, wherein 1kg of paraffin, 1kg of petrolatum, 0.5kg of machine oil and 1.5kg of chlorinated paraffin.

[0034] The operation steps for preparing high-safety emulsion explosives for coal mines are as follows:

[0035] The first step: water phase preparation: put the ammonium nitrate, sodium nitrate, calcium nitrate, sensitizer, urea, composite flame suppressant and water in the above formula into the water phase dissolution tank wit...

Embodiment 2

[0043] High-safety emulsion explosives for coal mines are made from the following raw materials in parts by weight:

[0044]

[0045]

[0046] Composite flame suppressant is made up of potassium chloride and ammonium chloride, by weight potassium chloride 13.0kg, ammonium chloride 3.0kg;

[0047] The compound emulsifier is composed of sorbitan monooleate and soybean lecithin, 2.3kg of sorbitan monooleate and 0.3kg of soybean lecithin;

[0048] The composite oil phase is composed of paraffin, vaseline, mechanical oil, and chlorinated paraffin, including 1.0kg of paraffin, 1.0kg of vaseline, 0.4kg of mechanical oil, and 1.5kg of chlorinated paraffin.

[0049] The operating steps of the above-mentioned high-safety coal mine emulsion explosive method are the same as in Example 1, and the different process conditions are as follows:

[0050] The first step: water phase preparation: heating to a temperature of 110°C;

[0051] The second step: oil phase preparation: heating t...

Embodiment 3

[0056] Emulsion explosives for high-safety coal mines are made from the following raw materials in parts by weight:

[0057]

[0058]

[0059] Composite flame suppressant is composed of potassium chloride and ammonium chloride, potassium chloride 13.0kg, ammonium chloride 4.0kg;

[0060] The compound emulsifier is composed of sorbitan monooleate and soybean lecithin, 2.5kg of sorbitan monooleate and 0.5kg of soybean lecithin;

[0061] The composite oil phase is composed of paraffin, vaseline, mechanical oil, and chlorinated paraffin, including 1.0kg of paraffin, 1.0kg of vaseline, 0.3kg of mechanical oil, and 1.3kg of chlorinated paraffin.

[0062] The operating steps of the above-mentioned high-safety coal mine emulsion explosive method are the same as in Example 1, and the different process conditions are as follows:

[0063] The first step: water phase preparation: heating to a temperature of 115°C;

[0064] The second step: oil phase preparation: heating to a tempe...

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Abstract

The invention relates to high-safety emulsion explosive for a coal mine. The explosive comprises the following raw materials: ammonium nitrate, sodium nitrate, calcium nitrate, sensitizing agent, urea, compound flame inhibitor, water, compound emulsifier, a compound oil phase, foaming agent, foaming accelerating agent and expanded perlite; and the preparation steps of the high-safety emulsion explosive are as follows: preparing a water phase, preparing the oil phase, emulsifying, cooling, sensitizing and charging and packaging.The explosive performance accords with the GB18095-2000 standard, a mine-gas-safety test shows that the test reading is 250g, 0 / 5 when any flammable item is suspended, the mine gas does not ignite gas, and the safety level of the explosive is one grade higher than that of the explosive for three-grade coal mines with the highest grade in China; and on the premise of ensuring the safety of combustible gas, a new formula with the compound flame inhibitor, the compound foaming agent and ethanolamine nitrate or potassium nitrate added as the sensitizing agent is adopted, thus, the initiation sensitivity of the explosive is improved, the anti-deflagrability capability of the explosive is enhanced, and the safe production of the coal mine is better ensured.

Description

technical field [0001] The invention belongs to the technical field of coal mine safety production, and in particular relates to an emulsion explosive for coal mines. Background technique [0002] Permissible explosives in coal mines are an important part of industrial explosives in my country. They are classified according to the conditions of use of industrial explosives and are specially designed for use in underground coal mines where there is a risk of combustible gas and coal dust explosions. At present, in my country's coal mines, especially small and medium-sized coal mines and township coal mines, most of them still use blasting coal mining, which provides a market and development prospects for coal mines. Permitted explosives are advancing rapidly. [0003] At present, the types of explosives allowed in coal mines in my country mainly include ammonium ladder explosives allowed in coal mines, water gel explosives allowed in coal mines and emulsion explosives allowed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B31/28
Inventor 孙玉华宋家良王继峰高铭尹新周易坤戴明虎
Owner CHINA COAL TECH & ENG GRP HUAIBEIBLASTING TECHN RES INST