KR20010095945A - Explosives which is mixture of anfo and water in oil explosives - Google Patents

Abstract

PURPOSE: An explosive by mixing an ammonium nitrate-fuel oil explosive and an emulsion explosive is provided to improve the density of the explosive by mixing the W/O type emulsion explosive with the AN-FO explosive and to improve the water-proofing in a base rock. CONSTITUTION: The explosive by mixing the ammonium nitrate-fuel oil explosive and the emulsion explosive includes the W/O(water in oil) type emulsion explosive and the ammonium nitrate-fuel oil explosive. The explosive is composed of an oxidizer water solution, in which ammonium of 60-90 and water of 5-30 are contained, the mineral oil of 3-15, an emulsifier of 0.5-10.0 and minute hollow body of 0.5-2.00. The sodium nitrate of 0.1-10 is added to the oxidizer water solution. PIBSA(Polyisobutenyl Succinic Anhydride reacted with an alcohol Anhydride) and SMO(Sorbitan Monooleate) are contained in the emulsifier.

Description

EXPLOSIVES WHICH IS MIXTURE OF ANFO AND WATER IN OIL EXPLOSIVES}

The present invention relates to explosives used in the open-air and tunnel blasting site, and more particularly to explosives that can increase the filling density and lower the explosive cost of the explosives by mixing the W / O type emulsion explosives and colostrum explosives.

Typically, W / O type emulsion explosives refers to water-in-oil explosives and super-explosives refer to ANFO. Since the composition and manufacturing method of such explosives are well known techniques, detailed descriptions thereof will be omitted. Shall be. Additionally, the W / O type emulsion explosives are disclosed in Korean Patent Application Laid-open No. 94-14482 filed by Hanwha Corporation (water-in-oil type low-performance low-speed emulsion explosive composition) and Dow Corning Corporation. Application No. 86-2491 (oil-in-water emulsion composition and preparation method thereof) and Application No. 90-12292 (oil-in-water emulsion explosive) filed in "Asahi Seigo Ohkyo Chemical Co., Ltd." It is described in detail. In addition, the ultra-explosive is described in detail in Korean Laid-open Patent Publication No. 98-1980 (a domestic ultra-explosive composition).

On the other hand, the aforementioned W / O emulsion explosive is basically a hydrocarbon oil such as mineral oil, wax and other continuous phases, and the discontinuous phase contains an aqueous solution of oxidant composed of ammonium nitrate and sodium nitrate. In addition, such emulsion explosives can be obtained having a wide range of sensitivity from the buster detonation to the primer detonation 6 by adding organic and inorganic microspheres.

Nowadays, blasting is more efficient and low-cost explosives are being used. The explosives corresponding to this are bulk-type explosives. The main raw material of the ultra-explosive is manufactured by using granular ammonium nitrate and light oil. It can be easily manufactured without complicated manufacturing facilities. Therefore, it is used for large-scale blasting work with low explosives. Today, the market share is gradually increasing in the US and Europe.

However, such a superexplosive is composed of ammonium nitrate, so that it is easily dissolved in moisture or water in the air, so that the power as an explosive is lowered and the sensitivity of the detonation is significantly lowered. In addition, there is a problem that the blasting effect is significantly lowered because the filling density of the explosives when charging in the foam hole.

Accordingly, an object of the present invention for solving the above problems is to provide an explosive that can increase the density of the explosive and improve the water resistance to the water standing in the rock by mixing the ultra-explosive with a W / O-type emulsion explosive have.

Another object of the present invention is to provide an explosive that can increase the filling density and lower the expenditure of the explosives by mixing the W / O type emulsion explosives and ultra-explosives.

The present invention according to the first aspect for achieving the above object is an aqueous solution of oxidizing agent of ammonium 60-90, water 5-30, mineral oil 3-15, emulsifier 0.5-10.0, and microspheres 0.5-20.0. After making a W / O type emulsion explosive, and then making a colostrum explosive with ammonium nitrate 90-98 and light oil 2-10, the explosive of this invention made by mixing them in a fixed ratio is proposed.

Hereinafter, preferred embodiments of the present invention will be described in detail. In addition, it should be noted that in the following description, only parts necessary for understanding the explosive preparation method of the present invention will be described, and descriptions of other parts will be omitted so as not to obscure the subject matter of the present invention.

First, the explosive preparation method proposed in the present invention is a polyisobutylene succinic anhydride (Polyisobutenyl Succinic Anhydride reacted with an alcohol Anhydride: hereinafter referred to as "PIBSA") and sorbitan, which are generally used as an emulsifier of explosives. Sorbitan Monoleate (hereinafter referred to as "SMO") type was used. Experimental results using these emulsifiers showed that PIBSA type emulsifiers had no deterioration in detonation and detonation sensitivity even after 6 months of storage stability test, but SMO type emulsifiers did not detonate significantly after 3 months.

In addition, the present invention is about 0.5 to 5.0 of the microspheres in the emulsion explosives to determine the effect according to the amount of the pre-treatment agent (hereinafter referred to as "microspheres") in the W / O emulsion explosives including super-explosives Test by addition. This test resulted in no detonation in the case of 0.5 microspheres, and in 5.0 the detonation decreased and 6 months later. At this time, the above-mentioned microspheres are hollow spheres having a size of 10 to 200 μm or more and 50 or more. In general, inorganic hollow spheres mainly containing organic materials such as phenol resin and polyvinyl chloride and glass are used. These materials were found to not change the sensitivity and speed of detonation even after 6 months.

Hereinafter, the present invention will be described in detail based on the preferred embodiment of the present invention, but the present invention is not limited to the embodiment. In addition, the explosive preparation method according to the present invention comprises a W / O type emulsion explosives manufacturing process and a super-explosives manufacturing process and a process for mixing them, will be described in detail for each process below.

{Example 1}

First process; W / O type emulsion explosive manufacturing process

Mineral oil 6, a continuous fuel component, is mixed with an aqueous solution of an oxidant in a discontinuous phase of ammonium nitrate 75 and water 16, and an emulsifier 1.5 containing PIBSA and a glassy microsphere 1.5 are mixed. A type emulsion explosive was prepared.

Second process; Colostrum Explosives Manufacturing Process

A colostrum explosive was prepared by mixing ammonium nitrate 94 and diesel oil 6 having a granule of 1.0 to 2.0 mm in size of 85 or more.

Third process; Mixing process

The explosives of the present invention were prepared by mixing the W / O type emulsion explosives 80 and the colostrum explosive 20 having the composition described above.

{Example 2}

The explosive charge of the present invention is prepared by mixing the W / O emulsion explosive charge 50 prepared in the same manner as in the first step of Example 1 and the colostrum explosive 50 prepared in the same manner as in the second step of the first embodiment. It was.

{Example 3}

The explosive charge of the present invention is prepared by mixing the W / O emulsion explosive charge 10 prepared in the same manner as in the first step of Example 1 and the colostrum explosive 90 prepared in the same manner as in the second step of the first embodiment. It was.

{Example 4}

First process; W / O type emulsion explosive manufacturing process

Mineral oil 6, which is a continuous fuel agent, is mixed with an aqueous solution of an oxidant which is a discontinuous phase of ammonium nitrate 75 and water 16, and an emulsifier 1.5 containing SMO and 1.5 glass microspheres 1.5 are mixed. A type emulsion explosive was prepared.

Second process; Colostrum Explosives Manufacturing Process

A colostrum explosive was prepared by mixing ammonium nitrate 94 and diesel oil 6 having a granule of 1.0 to 2.0 mm in size of 85 or more.

Third process; Mixing process

The explosives of the present invention were prepared by mixing the W / O type emulsion explosives 80 and the colostrum explosive 20 having the composition described above.

{Example 5}

First process; W / O type emulsion explosive manufacturing process

W / O is mixed with 6.1 of PIBSA-containing emulsifier and 0.5 glassy microspheres by mixing discontinuous phase oxidant solution with ammonium nitrate 75.8 and water 16.1. A type emulsion explosive was prepared.

Second process; Colostrum Explosives Manufacturing Process

A colostrum explosive was prepared by mixing ammonium nitrate 94 and diesel oil 6 having a granule of 1.0 to 2.0 mm in size of 85 or more.

Third process; Mixing process

The explosives of the present invention were prepared by mixing the W / O type emulsion explosives 80 and the colostrum explosive 20 having the composition described above.

{Example 6}

First process; W / O type emulsion explosive manufacturing process

W / O was mixed by mixing a continuous fuel mineral oil 5.8, a continuous fuel material, mineral oil 5.8 with ammonium nitrate 72.3 and an aqueous oxidant solution of 15.4 water, and a mixture of emulsifier 1.4 containing PIBSA and glass microspheres 5.0. A type emulsion explosive was prepared.

Second process; Colostrum Explosives Manufacturing Process

A colostrum explosive was prepared by mixing ammonium nitrate 94 and diesel oil 6 having a granule of 1.0 to 2.0 mm in size of 85 or more.

Third process; Mixing process

The explosives of the present invention were prepared by mixing the W / O type emulsion explosives 80 and the colostrum explosive 20 having the composition described above.

{Example 7}

First process; W / O type emulsion explosive manufacturing process

Mineral oil 6, a continuous fuel component, is mixed with an aqueous solution of an oxidant in a discontinuous phase of ammonium nitrate 75 and water 16, and an emulsifier 1.5 containing PIBSA and a glassy microsphere 1.5 are mixed. A type emulsion explosive was prepared.

Second process; Colostrum Explosives Manufacturing Process

A colostrum explosive was prepared by mixing ammonium nitrate 94 having a granular particle size of 1.0 to 2.0 mm and diesel oil 6.

Third process; Mixing process

The explosives of the present invention were prepared by mixing the W / O type emulsion explosives 80 and the colostrum explosive 20 having the composition described above.

On the other hand, as a result of testing the properties of the explosives made by the method according to each of Examples 1 to 7 described above, it can be seen that the properties of the explosives are significantly improved compared to conventional W / O type emulsion explosives or colostrum explosives, which are described in detail in Table 2. Indicated.

Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Detonation sensitivity O O O O Ｘ O O Storage stability 1 month O O O O Ｘ O O 3 months O O Ｘ Ｘ - O O 6 months O Ｘ - - - O O In width 1 month 5,350 4,700 3,200 5,270 Ｘ 4,850 5,130 3 months 5,270 4,620 3,270 - - 4,930 5,070 6 months 5,290 4,670 3,220 - - 4,790 5,160 density 1.25 1.12 1.00 1.26 1.32 1.12 1.23

Here, 1) the explosion sensitivity is said to be exploded when the W / O emulsion width of about 500g.

2) The storage stability is regarded as 1 cycle for 24 hours at -20 ℃ and 24 hours at + 60 ℃, which means that it explodes when detonated with converted water without quality change for 1 month at room temperature.

3) After 1 day of manufacture, the speed was measured by using an electric contact method in air. A PVC tube of 65 mm thick and 4 mm thick was used. (Unit: m / s)

4) Density was measured using a cup of known volume (unit: g / cc).

On the other hand, in the above detailed description of the present invention has been described with respect to specific embodiments, various modifications are possible without departing from the scope of the invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, the present invention utilizes each other's advantages rather than using conventional W / O type emulsion explosives or colostrum explosives alone to maximize the amount of rocks generated after blasting by increasing the filling density of the explosives in the blast holes. It has the advantage to do it.

In addition, the explosives of the present invention has a good rock crushing effect can reduce the secondary crushing cost, there is an increased effect that can be used while adjusting the amount of the W / O emulsion explosives according to the water content in the rock.

Claims (9)

Explosives made by mixing water-in-oil emulsion explosives and colostrum explosives. According to claim 1, wherein the water-in-oil emulsion explosives, An explosive containing a mixture of superexplosives and emulsion explosives, comprising an aqueous solution of an oxidizer having ammonium of 60 to 90, water of 5 to 30, mineral oil 3 to 15, emulsifier 0.5 to 10.0, and microspheres 0.5 to 20.0. 3. The explosives of claim 2, wherein 0.1 to 10 more sodium nitrate is added to the aqueous oxidant solution. The explosive mixture of an ultra-explosive and an emulsion explosive according to claim 2, wherein the emulsifier is an emulsifier containing polyisobutylene succinic anhydride or sorbitan monooleate. The method of claim 2, wherein the microspheres are at least one selected from the group consisting of {phenol resin organic, polyvinyl chloride organic, glass-based inorganic material} explosives mixed with an ultra-explosive and emulsion explosives . 6. The explosive mixture of the ultra-explosive and emulsion explosives according to claim 5, wherein the microspheres are hollow spheres having a size of 10 to 200 µm or more. The explosive mixture of claim 1 wherein the colostrum explosive is composed of ammonium nitrate 90-98 and diesel oil 2-10. 8. The explosive mixture of claim 7 wherein the ammonium nitrate has a particle size of 0.1 to 3.0 mm or more and a bulk density of 0.7 to 0.9 g / cc. The explosive mixture of any one of claims 1 to 8, wherein the mixing ratio of the emulsion explosive and the colostrum is about 80 to 10:20 to 90.