Preparation method of emulsion explosive with high sympathetic detonation sensitivity

Abstract

The invention relates to the field of emulsion explosives, in particular to a preparation method of an emulsion explosive with high sympathetic detonation sensitivity, which comprises the following steps: 1, adding a salt containing monovalent anions into a first aqueous phase solution to obtain a second aqueous phase solution, wherein the first aqueous phase solution is an aqueous solution of ammonium nitrate and sodium nitrate, 2, emulsifying the second aqueous phase solution and the oil phase solution to obtain an emulsion matrix, and 3, carrying out chemical sensitization on the emulsion matrix, and charging through a filling machine to obtain the emulsion explosive with high sympathetic detonation sensitivity. The preparation method has the beneficial effects that the sympathetic detonation sensitivity of the emulsion explosive prepared by the preparation method disclosed by the invention is improved, and meanwhile, the storage time of the emulsion explosive can also be prolonged.The emulsion explosive prepared by the preparation method disclosed by the invention has the characteristics of high detonation velocity, large sympathetic detonation distance, strong low-temperatureresistance and the like.

Description

technical field

[0001] The invention relates to the field of emulsion explosives, in particular to a method for preparing emulsion explosives with high detonation sensitivity. Background technique

[0002] Sensitivity is the ability of explosive substances to undergo explosive changes under the action of external energy. The minimum energy required to cause an explosive change in a substance is called the excitation impulse. The smaller the excitation impulse required to cause explosive changes, the more sensitive the explosive and the greater its sensitivity.

[0003] Fujian Province is a hilly terrain, the geological environment of the mining area is complex, and there are a large number of joints, fissures and caves. Affected by this terrain, when emulsion explosives are used for millisecond delay blasting operations, occasional post-explosion blast hole charges do not fully explode Or the situation of detonation rejection, the study believes that this is because the la...

Examples

preparation example Construction

[0012] A kind of preparation method of the big emulsified explosive of detonation sensitivity of the present invention comprises the following steps:

[0013] Step 1: adding a salt containing a monovalent anion to the first aqueous phase solution to obtain a second aqueous phase solution, the first aqueous phase solution being an aqueous solution in which the solute includes ammonium nitrate and sodium nitrate;

[0014] Step 2: After emulsifying the second aqueous phase solution and the oil phase solution, an emulsified matrix is ​​obtained;

[0015] Step 3: chemically sensitize the emulsified matrix and charge it through a filling machine to obtain an emulsified explosive with high detonation sensitivity.

[0016] The principle of the present invention is: the stability of the emulsion explosive system depends on the interaction of the electric double layer on the surface of the colloidal particles. When the charge of the electric double layer on the surface of the colloidal...

Embodiment 1

[0028] A preparation method for an emulsion explosive with high detonation sensitivity, comprising the steps of:

[0029] Step 1: adding a salt containing a monovalent anion to the first aqueous phase solution to obtain a second aqueous phase solution, the first aqueous phase solution being an aqueous solution in which the solute includes ammonium nitrate and sodium nitrate;

[0030] Step 2: After emulsifying the second aqueous phase solution and the oil phase solution, an emulsified matrix is ​​obtained;

[0031] Step 3: chemically sensitize the emulsified matrix and charge it through a filling machine to obtain an emulsified explosive with high detonation sensitivity.

[0032] The percentage by weight of each component in the above-mentioned second aqueous phase solution is 79% to 82% of ammonium nitrate, 3% to 6% of sodium nitrate, and 9% to 16% of water, wherein the salt containing monovalent anions The ratio of the weight to the total weight of the second aqueous phase s...

Embodiment 2

[0035] A kind of preparation method of high temperature sensitized emulsified explosive with high detonation sensitivity, prepare 1t of this aqueous phase solution including 799kg ammonium nitrate, 60kg sodium nitrate, 140kg water and 1kg sodium chloride, the prepared aqueous phase solution and oil phase The solution was emulsified at 95°C to obtain an emulsified matrix, which was chemically sensitized and filled with a filling machine, packed into rolls with a weight of 300g, a diameter of 32mm, and a length of 34cm; The drug rolls are packed into one bag, and four bags of drug rolls are packed into a box; the explosive performance of the emulsion explosives from new products to storage for 12 months is tested respectively, as shown in Table 1;

[0036] Table 1

[0037]

technical field

[0001] The invention relates to the field of emulsion explosives, in particular to a method for preparing emulsion explosives with high detonation sensitivity. Background technique

[0002] Sensitivity is the ability of explosive substances to undergo explosive changes under the action of external energy. The minimum energy required to cause an explosive change in a substance is called the excitation impulse. The smaller the excitation impulse required to cause explosive changes, the more sensitive the explosive and the greater its sensitivity.

[0003] Fujian Province is a hilly terrain, the geological environment of the mining area is complex, and there are a large number of joints, fissures and caves. Affected by this terrain, when emulsion explosives are used for millisecond delay blasting operations, occasional post-explosion blast hole charges do not fully explode Or the situation of detonation rejection, the study believes that this is because the la...

Examples

preparation example Construction

[0012] A kind of preparation method of the big emulsified explosive of detonation sensitivity of the present invention comprises the following steps:

[0013] Step 1: adding a salt containing a monovalent anion to the first aqueous phase solution to obtain a second aqueous phase solution, the first aqueous phase solution being an aqueous solution in which the solute includes ammonium nitrate and sodium nitrate;

[0014] Step 2: After emulsifying the second aqueous phase solution and the oil phase solution, an emulsified matrix is ​​obtained;

[0015] Step 3: chemically sensitize the emulsified matrix and charge it through a filling machine to obtain an emulsified explosive with high detonation sensitivity.

[0016] The principle of the present invention is: the stability of the emulsion explosive system depends on the interaction of the electric double layer on the surface of the colloidal particles. When the charge of the electric double layer on the surface of the colloidal...

Embodiment 1

[0028] A preparation method for an emulsion explosive with high detonation sensitivity, comprising the steps of:

[0029] Step 1: adding a salt containing a monovalent anion to the first aqueous phase solution to obtain a second aqueous phase solution, the first aqueous phase solution being an aqueous solution in which the solute includes ammonium nitrate and sodium nitrate;

[0030] Step 2: After emulsifying the second aqueous phase solution and the oil phase solution, an emulsified matrix is ​​obtained;

[0031] Step 3: chemically sensitize the emulsified matrix and charge it through a filling machine to obtain an emulsified explosive with high detonation sensitivity.

[0032] The percentage by weight of each component in the above-mentioned second aqueous phase solution is 79% to 82% of ammonium nitrate, 3% to 6% of sodium nitrate, and 9% to 16% of water, wherein the salt containing monovalent anions The ratio of the weight to the total weight of the second aqueous phase s...

Embodiment 2

[0035] A kind of preparation method of high temperature sensitized emulsified explosive with high detonation sensitivity, prepare 1t of this aqueous phase solution including 799kg ammonium nitrate, 60kg sodium nitrate, 140kg water and 1kg sodium chloride, the prepared aqueous phase solution and oil phase The solution was emulsified at 95°C to obtain an emulsified matrix, which was chemically sensitized and filled with a filling machine, packed into rolls with a weight of 300g, a diameter of 32mm, and a length of 34cm; The drug rolls are packed into one bag, and four bags of drug rolls are packed into a box; the explosive performance of the emulsion explosives from new products to storage for 12 months is tested respectively, as shown in Table 1;

[0036] Table 1

[0037]

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